RT120Q Operator's Manual - Ditch Witch

RT120Q 

Operator’s 

Manual 

Issue 1.1 

Original Translation 

CMW ® 053-2634

RT120Q Operator’s Manual Overview - 1 

Chapter Contents 

Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 2 

Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 

Equipment Modification . . . . . . . . . . . . . . . . . . . . . . 3 

Unit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 

Operator Orientation. . . . . . . . . . . . . . . . . . . . . . . . . 5 

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 5 

• Bulleted Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 

• Numbered Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 

Overview 

CMW

Overview - 2 

Serial Number Location 

RT120Q Operator’s Manual 

Serial Number Location 

Record serial numbers and date of purchase in spaces provided. RT120Q (1) and engine serial numbers 

(2) are located as shown. 

1 2 

t37om002w.eps 

Date of manufacture 

Date of purchase 

RT120Q serial number 

Front attachment serial number 

Rear attachment serial number 

Trailer serial number 

Engine serial number 

CMW


Intended Use 

Intended Use 

The RT120Q is a riding trencher designed to install buried service lines of various sizes using a variety of 

Ditch Witch attachments. 

Attachment Max. width/diameter Max. depth 

H910 trencher 24” (610 mm) 96” (2.4 m) 

H911 trencher 24” (610 mm) 92” (2.3 m) 

H1032 plow 3” (80 mm) 42” (1.07 m) 

H1052 combo n/a 70” (1.78 m) 

H1140 saw 103” (1.03 m) 40.5” (1.03 m) 

RC120 reel carrier 84” (2.13 m) reel dia n/a 

A920 backhoe 24” (610 mm) 105” (2.7 m) 

This unit is designed for operation in temperatures typically experienced in earth moving and construction 

work environments. Provisions may be required to operate in extreme temperatures. Contact your Ditch 

Witch dealer. Use in any other way is considered contrary to the intended use. 

The RT120Q should be used with genuine Ditch Witch chain, teeth, and sprockets. It should be operated, 

serviced, and repaired only by persons familiar with their particular characteristics and acquainted with the 

relevant safety procedures. 

Equipment Modification 

This equipment was designed and built in accordance with applicable standards and regulations. 

Modification of equipment could mean that it will no longer meet regulations and may not function properly 

or in accordance with the operating instructions. Modification of equipment should only be made by 

competent personnel possessing knowledge of applicable standards, regulations, equipment design 

functionality/requirements and any required specialized testing. 

The protection offered by the Rollover Protective System (ROPS) will be impaired if it has been subjected 

to any modification, structural damage, or has been involved in an overturn accident. The ROPS must be 

replaced after a roll-over. 

CMW

Overview - 4 

Unit Components 


Unit Components 

2 3 4 

1 

5 

t37om003w.eps 

1. Rollover Protective Structure (ROPS) 

2. Operator station 

3. Control console 

4. Engine compartment 

5. Backfill blade (optional) 

WARNING: The protection offered by the Rollover Protective System (ROPS) will be impaired if it has 

been subjected to any modification, structural damage, or has been involved in an overturn accident. 

The ROPS must be replaced after a roll-over. 

CMW


Operator Orientation 

Operator Orientation 

1 

1. Front of unit 

2. Right of unit 

3. Rear of unit 

4. Left of unit 

Right and left sides of machine are determined by 

facing front of unit while seated at the controls. 

4 

2 

3 

t37om004w.eps 

About This Manual 

This manual contains information for the proper use of this machine. See Operation Overview for basic 

operating procedures. Cross references such as “See page 50” will direct you to detailed procedures. 

Bulleted Lists 

Bulleted lists provide helpful or important information or contain procedures that do not have to be 

performed in a specific order. 

Numbered Lists 

Numbered lists contain illustration callouts or list steps that must be performed in order. 

CMW

Overview - 6 


About This Manual 

CMW

RT120Q Operator’s Manual Foreword - 7 

Foreword 

This manual is an important part of your equipment. It provides safety information and operation 

instructions to help you use and maintain your Ditch Witch equipment. 

Read this manual before using your equipment. Keep it with the equipment at all times for future reference. 

If you sell your equipment, be sure to give this manual to the new owner. 

If you need a replacement copy, contact your Ditch Witch dealer. If you need assistance in locating a 

dealer, visit our website at www.ditchwitch.com or write to the following address: 

The Charles Machine Works, Inc. 

Attn: Marketing Department 

PO Box 66 

Perry, OK 73077-0066 

USA 

The descriptions and specifications in this manual are subject to change without notice. The Charles 

Machine Works, Inc. reserves the right to improve equipment. Some product improvements may have 

taken place after this manual was published. For the latest information on Ditch Witch equipment, see your 

Ditch Witch dealer. 

Thank you for buying and using Ditch Witch equipment. 

CMW

Foreword - 8 


RT120 T4i 

Operator’s Manual 

Issue number 1.0/OM-05/13 

Part number 053-2634 

Copyright 2013 

by The Charles Machine Works, Inc. 

Machine Works, Inc. 

, Ditch Witch, CMW, and Roto Witch are registered trademarks of The Charles 

CMW

RT120Q Operator’s Manual Contents - 9 

Contents 

Overview 

machine serial number, information about the type of work this machine is designed 

to perform, basic machine components, and how to use this manual 

Foreword 

part number, revision level, and publication date of this manual, and factory contact 

information 

Safety 

machine safety alerts and emergency procedures 

Controls 

machine controls, gauges, and indicators and how to use them 

1 

7 

11 

21 

Operation Overview 

an overview for completing a job with this machine: planning, setting up, installing 

product, and restoring the jobsite; with cross references to detailed procedures 

Prepare 

procedures for inspecting and classifying the jobsite, planning the installation path, 

and preparing the jobsite for work 

Drive 

procedures for startup, cold start, driving, and shutdown 

Transport 

procedures for lifting, hauling, and towing 

65 

69 

75 

81 

Trench 

procedures for trenching 

93 

Plow 

procedures for plowing 

101 

Reel Carrier 

procedures for using reel carrier 

111 

Backhoe 

procedures for digging with backhoe 

115 

CMW

Contents - 10 


Drill 

procedures for drilling 

121 

Saw 

procedures for sawing 

Systems and Equipment 

chain, teeth, sprockets, and optional equipment 

129 

137 

Complete the Job 

procedures for backfilling and restoring the jobsite and rinsing and storing 

equipment 

Service 

service intervals and instructions for this machine including lubrication, replacement 

of wear items, and basic maintenance 

Specifications 

machine specifications including weights, measurements, power ratings, and fluid 

capacities 

Support 

the warranty policy for this machine, and procedures for obtaining warranty 

consideration and training 

Service Record 

a record of major service performed on the machine 

143 

145 

187 

205 

209 

CMW

RT120Q Operator’s Manual Safety - 11 


Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 

Safety Alert Classifications . . . . . . . . . . . . . . . . . . 13 

Safety Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 

Emergency Procedures . . . . . . . . . . . . . . . . . . . . . 17 

• Electric Strike Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 

• If an Electric Line is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 

• If a Gas Line is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 

• If a Fiber Optic Cable is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 

• If Machine Catches on Fire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 

Safety 

CMW®

Safety - 12 


Guidelines 

Guidelines 

Follow these guidelines before operating any jobsite equipment: 

• Complete proper training and read operator’s manual before using equipment. 

• Contact your local One-Call (811 in USA) or the One-Call referral number (888-258-0808 in USA and 

Canada) to have underground utilities located before digging. Also contact any utilities that do not 

participate in the One-Call service. Mark proposed path with white paint prior to contacting One-Call or 

utilities. 

• Classify jobsite based on its hazards and use correct tools and machinery, safety equipment, and work 

methods for jobsite. 

• Mark jobsite clearly and keep spectators away. 

• Wear personal protective equipment. 

• Review jobsite hazards, safety and emergency procedures, and individual responsibilities with all 

personnel before work begins. Safety videos are available from your Ditch Witch ® dealer. 

• Replace missing or damaged safety shields and safety signs. 

• Use equipment carefully. Stop operation and investigate anything that does not look or feel right. 

• Do not operate unit where flammable gas may be present. 

• Contact your Ditch Witch dealer if you have any question about operation, maintenance, or equipment 

use. 

• Complete the equipment checklist located at www.ditchwitch.com/resources/safety. 

CMW®


Safety Alert Classifications 

Safety Alert Classifications 

These classifications and the icons defined on the following pages work together to alert you to situations 

which could be harmful to you, jobsite bystanders or your equipment. When you see these words and 

icons in the book or on the machine, carefully read and follow all instructions. YOUR SAFETY IS AT 

STAKE. 

Watch for the three safety alert levels: DANGER, WARNING and CAUTION. Learn what each level 

means. 

indicates a hazardous situation that, if not avoided, will result in death or serious injury. 

This signal word is to be limited to the most extreme situations. 

indicates a hazardous situation that, if not avoided, could result in death or serious injury. 

injury. 

indicates a hazardous situation that, if not avoided, could result in minor or moderate 

Watch for two other words: NOTICE and IMPORTANT. 

NOTICE indicates information considered important, but not hazard-related (e.g., messages relating to 

property damage). 

IMPORTANT can help you do a better job or make your job easier in some way. 

CMW®

Safety - 14 

Safety Alerts 


Safety Alerts 

Moving digging teeth will cause death or 

serious injury. Trench cave-in can cause you to fall. Stay 

away. 

Turning shaft will kill you or crush arm or leg. Stay away. 

Electric shock. Contacting electric lines will cause death or serious injury. 

Know location of lines and stay away. 

Jobsite hazards could cause death or serious injury. Use 

correct equipment and work methods. Use and maintain proper safety 

equipment. 

Crushing weight could cause death or serious injury. Use 

proper procedures and equipment or stay away. 

Moving parts could cut off hand or foot. Stay away. 

Explosion possible. Serious injury or equipment damage could occur. 

Follow directions carefully. 

Incorrect procedures could result in death, injury, or property damage. 

Learn to use equipment correctly. 

CMW®


Safety Alerts 

Fall possible. Riders can fall from machine and be injured or killed. Only 

operator is allowed on machine. 

Rollover possible. If machine rolls over, you could be thrown from seat and 

killed or crushed. Wear seat belt. 

Improper control function could cause death or serious injury. If control does 

not work as described in instructions, stop machine and have it serviced. 

Looking into fiber optic cable could result in permanent vision damage. Do 

not look into ends of fiber optic or unidentified cable. 

Pressurized fluid or air could pierce skin and cause injury or 

death. Stay away. 

Runaway possible. Machine could run over you or others. Learn how to use 

all controls. Start and operate only from operator’s position. 

Fire or explosion possible. Fumes could ignite and cause burns. No 

smoking, no flame, no spark. 

Avoid static electricity when fueling. Ultra Low Sulfur Diesel (ULSD) poses a 

greater static ignition hazard than earlier diesel formulations. Avoid death or serious injury 

from fire or explosion. Consult with your fuel system supplier to ensure the delivery system 

is in compliance with fueling standards for proper grounding and bonding practices. 

CMW®

Safety - 16 


Safety Alerts 

Moving traffic - hazardous situation. Death or serious injury could result. 

Avoid moving vehicles, wear high visibility clothing, post appropriate warning signs. 

Hot pressurized cooling system fluid could cause serious burns. Allow to 

cool before servicing. 

Flying objects may cause injury. Wear hard hat and safety glasses. 

Hot parts may cause burns. Do not touch until cool. 

protection. 

Exposure to high noise levels may cause hearing loss. Wear hearing 

Fall possible. Slips or trips may result in injury. Keep area clean. 

Battery acid may cause burns. Avoid contact. 

Improper handling or use of chemicals may result in illness, injury, or 

equipment damage. Follow instructions on labels and in material safety data sheets 

(MSDS). 

Breathing crystalline silica dust may cause lung disease. Cutting, drilling, or 

working materials such as concrete, sand, or rock containing quartz may result in exposure 

to silica dust. Use dust control methods or appropriate breathing protection when exposed 

to silica dust. 

CMW®


Emergency Procedures 




equipment. 

Before operating any equipment, review emergency procedures and check that all safety precautions have 

been taken. 

EMERGENCY SHUTDOWN - Turn ignition switch to stop position or push remote engine stop button (if 

equipped). 

Electric Strike Description 

Electric shock. Contacting electric lines will cause death or serious injury. 

Know location of lines and stay away. 

When working near electric cables, remember the following: 

• Electricity follows all paths to ground, not just path of least resistance. 

• Pipes, hoses, and cables will conduct electricity back to all equipment. 

• Low voltage current can injure or kill. Many work-related electrocutions result from contact with less 

than 440 volts. 

Most electric strikes are not noticeable, but indications of a strike include: 

• power outage 

• smoke 

• explosion 

• popping noises 

• arcing electricity 

If any of these occur, assume an electric strike has occurred. 

CMW®

Safety - 18 

If an Electric Line is Damaged 



If you suspect an electric line has been damaged and you are on tractor, DO NOT MOVE. Remain on 

tractor and take the following actions. The order and degree of action will depend upon the situation. 

• Warn people nearby that an electric strike has occurred. Instruct them to leave the area and contact 

utility. 

• Raise attachments and drive from immediate area. 

• Contact utility company to shut off power. 

• Do not return to jobsite or allow anyone into area until given permission by utility company. 

If you suspect an electric line has been damaged and you are off tractor, DO NOT TOUCH TRACTOR. 

Take the following actions. The order and degree of action will depend upon the situation. 

• LEAVE AREA. The ground surface may be electrified, so take small steps with feet close together to 

reduce the hazard of being shocked from one foot to the other. For more information, contact your 

Ditch Witch dealer. 

• Contact utility company to shut off power. 

• Do not return to jobsite or allow anyone into area until given permission by utility company. 

CMW®



If a Gas Line is Damaged 

Fire or explosion possible. Fumes could ignite and cause burns. No 

smoking, no flame, no spark. 

Explosion possible. Serious injury or equipment damage could occur. 

Follow directions carefully. 

If you suspect a gas line has been damaged, take the following actions. The order and degree of action will 

depend on the situation. 

• Immediately shut off engine(s), if this can be done safely and quickly. 

• Remove any ignition source(s), if this can be done safely and quickly. 

• Warn others that a gas line has been cut and that they should leave the area. 

• Leave jobsite as quickly as possible. 

• Immediately call your local emergency phone number and utility company. 

• If jobsite is along street, stop traffic from driving near jobsite. 

• Do not return to jobsite until given permission by emergency personnel and utility company. 

CMW®

Safety - 20 

If a Fiber Optic Cable is Damaged 



Do not look into cut ends of fiber optic or unidentified cable. Vision damage can occur. 

If Machine Catches on Fire 

Perform emergency shutdown procedure and then take the following actions. The order and degree of 

action will depend on the situation. 

• Immediately move battery disconnect switch (if equipped and accessible) to disconnect position. 

• If fire is small and fire extinguisher is available, attempt to extinguish fire. 

• If fire cannot be extinguished, leave area as quickly as possible and contact emergency personnel. 

CMW®

RT120Q Operator’s Manual Controls - 21 


Center Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 

Graphic Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 

Right Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 

Left Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 

Seat Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 

Seat Deck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 

Trencher Controls. . . . . . . . . . . . . . . . . . . . . . . . . . 49 

Plow Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 

Combo Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 

Backhoe Console . . . . . . . . . . . . . . . . . . . . . . . . . . 56 

Saw Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 

Drill Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 

Battery Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . 63 

Controls 

CMW

Controls - 22 

Center Console 



4 5 6 7 

3 

8 

2 

9 

1 

10 

11 

t37om001w.eps 

1. Auxiliary power outlet 

2. Horn switch 

3. Engine override switch 

4. Axle lock switch 

5. Graphic display 

6. Ground drive speed switch 

7. Reel carrier switch* 

8. Reel winder mode selector switch* 

9. Ignition key switch 

10. Ground drive foot control 

11. Steering column tilt control 

* option 

CMW



Item Description Notes 

1. Auxiliary outlet Provides power for other 

equipment. 

Power output is 12V, 10A. 

c00ic179h.eps 

2. Horn To sound horn, press. 

c00ic044h.eps 

3. Engine override switch For engine override, press. 

c00ic024w.eps 

4. Axle lock switch To lock rear axle, press top. 

To unlock rear axle, press 

bottom. 

NOTICE: To prevent mechanical 

damage, stop tractor before operating 

axle lock switch. 

IMPORTANT: After pressing switch to 

unlock axle, it may be necessary to 

move tractor 6’ (2 m) in reverse to 

fully unlock. 

CMW

Controls - 24 




5. Graphic display Graphic symbols are 

displayed for indicators and 

conditions previously shown 

with gauges. 

See more information in “Graphic 

Display” on page 26. 

! 

c00ic604w.eps 

6. Ground drive speed 

switch 

c00ic602w.eps 

3 

2 

1 

To select High (3), Medium 

(2) or Low (1), press 

appropriate switch position. 

Screen icon displays High, Medium or 

Low selection. 

7. Reel carrier switch To raise, press top. 

Optional. 

To lower, press bottom. 

c00ic205h.eps 

8. Reel winder selector 

switch 

To change backfill blade 

joystick to reel winder control 

mode, press top. 

To return to backfill blade 

mode, press bottom. 

Optional. 

c00ic642w.eps 

CMW




9. Ignition switch To start engine, insert key and 

turn clockwise. 

To stop engine, turn 

counterclockwise. 

IMPORTANT: If engine does not start 

on first attempt, check that all 

interlock requirements have been 

met, return switch to STOP, and try 

again. 

c00ic027w.eps 

10. Ground drive foot 

control 

c00ic072c.eps 

11. Steering column tilt 

control 

To move tractor forward, push 

top of pedal. 

To move tractor backward, 

push bottom of pedal. 

To increase speed in either 

direction, push pedal farther 

from center. 

To reduce speed in either 

direction, release pedal. 

To adjust tilt, pull. 

To secure steering column in 

position, release. 

Pedal should automatically return to 

neutral when released. 

c00ic037w.eps 

CMW

Controls - 26 

Graphic Display 



0% 

0% 3 0% 

0 RPM 

0 : 00 : 00 AM/PM 

15 

10 20 

RPM 

5 25 

x100 

0 30 

0 

0.0 v 0 PSI 

0 F 

0.0 H 

t37om048w.eps 

The graphic display module shows engine RPM and has icons for other functions. Soft keys allow the 

operator to toggle between various screens and functions. 


Attachment speed 

Displays precentage of 

attachment speed, and plow 

or trencher/saw mode. 

Note: Screen icons change according 

to attachment being operated. 

c00ic028w.eps 

CMW




Operator presence 

Idicates operator presence 

and start interlock condition. 

c00ic001w.eps 

Fuel level 

Displays fuel level and 

percentage. 

c00ic003w.eps 

Batery voltage 

Displays battery voltage. 

c00ic008w.eps 

Day/Night mode 

Indicates selected mode. 

c00ic010w.eps 

CMW

Controls - 28 




Engine hours 

Displays engine hours. 

0.0 H 

c00ic020w.eps 

Engine oil pressure 

Displays engine oil pressure. 

c00ic005w.eps 

Engine coolant temperature 

Displays coolant temperature. 

c00ic004w.eps 

Axle lock 

Displays status of axle 

differential lock. 

c00ic002w.eps 

CMW




Ground drive speed/ 

direction 

Displays ground drive 

direction of travel, and speed 

as a percentage. 

c00ic006w.eps 

Ground drive gear indicator 

Displays selected gear in 

center of icon. 

c00ic009w.eps 

Cruise control indicator 

Displays cruise mode status. 

c00ic032w.eps 

Parking brake indicator 

Displays parking brake 

status. 

c00ic055t.eps 

CMW

Controls - 30 




Hydraulic filter restriction 

indicator 

Displays restriction status. 

Hydraulic fluid high 

temperature indicator 

Displays hot fluid status. 

c00ic037t.eps 

Menu indicator 

Displays menu icon over key 

3. 

c00ic031w.eps 

CMW



Main Menu 

SYSTEM 

SETTINGS 

USER 

SETTINGS 

GAUGE 

DISPLAY 

DIGNOSTICS 

t33om093w.eps 

Press the center soft key to display the main menu screen, which has icons for other functions. Soft keys 

below on screen icons allow the operator to toggle between various screens and functions. 


System Settings 

This is an information display. 

c00ic015w.eps 

CMW

Controls - 32 




User Settings 

Allows operator to customize 

settings. 

c00ic016w.eps 

Gauge Display 

Press the soft key below this 

on screen icon to select. 

c00ic017w.eps 

Diagnostics 

Displays interlock icons and 

diagnostic codes, if any. 

Press soft key below on 

screen icons to return to main 

menu or gauge display. 

Note: If diagnostic codes are 

displayed, contact your Ditch Witch 

dealer. 

c00ic018w.eps 

CMW



System Settings 

SYSTEM SETTINGS 

Component 

VERSION 

Part No. 

Application 

OS 

Bootloader 

Configuration 

2 

2 

2 

3 10155 

3 10081 

3 10146 

Release 

Release 

Release 

78333159 

78333166 

78333156 

1 0 1 Beta 

0 

RT120QT4i 

Back 

Copyright 

2012 The Charles Machine Works 

t37om043w.eps 


Back 

Press soft key below this icon 

to return to previous screen. 

Press center soft key to display gauge 

screen. 

c00ic011w.eps 

CMW

Controls - 34 



User Settings 

1 

USER 

Ambient Light 

SETTINGS 

Day 

3 

Brightness 

100% 

Units 

USA Standard 

2 

Language 

English 

4 

Back Save Reset 

t33om092w.eps 


Back 




screen. 

Down 

c00ic011w.eps 


to toggle through selections 

1-4. 


screen. 

c00ic012w.eps 

CMW




Save 


to save settings. 

c00ic013w.eps 

Reset 


to return to default settings. 

c00ic014w.eps 

Day/Night 


to select day or night mode. 

c00ic010w.eps 

CMW

Controls - 36 

Diagnostics 



N 

N 

MAIN 

MENU 

GAUGE 

DISPLAY 

t37om044w.eps 

Note: If diagnostic codes are displayed, contact your Ditch Witch dealer. 


Attachment Neutral 

Indicates attachment controls 

in neutral position. 

N 

c00ic021w.eps 

CMW




Operator Presence 

Indicates operator presence 

for start interlock status. 

c00ic001w.eps 

Ground Drive Neutral 

N 

Indicates ground drive 

controls in neutral position. 

c00ic022w.eps 

Main Menu 




screen. 

c00ic019w.eps 

Gauge Display 

Press the soft key below this 

on screen icon to select. 

c00ic017w.eps 

CMW

Controls - 38 




Engine stop 

Press to stop engine from 

backhoe operator’s station. 

Switch must be raised (reset) to allow 

engine starting. 

c00ic649w.eps 

CMW


Right Console 

Right Console 

1 2 3 4 5 

t37om005w.eps 

1. Backfill blade lift/tilt or reel winder control 

2. Rear steer control* 

3. Rear steer manual/auto control* 

4. Frame tilt control 

5. Throttle 

*option 

CMW

Controls - 40 


Right Console 


1. Backfill blade lift/tilt 

function control 

c00ic625w.eps 

Reel winder function 

control 

Backfill blade mode: 

• To lower, move forward. 

• To float, move forward to 

end. 

• To raise, move backward. 

• To tilt right side down, 

move right. 

• To tilt left side down, 

move left. 

Reel winder mode: 

• To unwind, move forward. 

• To wind, move backward. 

• To lower reel winder arm, 

move right. 

• To raise reel winder arm, 

move left. 

Reel winder mode selector switch on 

center console changes function to 

control reel winder arm lift and winder 

direction. 

c00ic207h.eps 

2. Rear steer switch To move rear tracks left, 

press left. 

To move rear tracks right, 

press right. 

NOTICE: 

• Tracks move when you press the 

switch. To stop movement, 

release switch. 

• Visually verify track position 

3. Rear steer manual/auto 

switch 

To center tracks, press right. 

To manually steer rear tracks, 

press left. 

Use manual mode and the manual 

rear steer switch to bypass auto 

mode. 

CMW



4. Frame tilt control To tilt left, press left. 

To tilt right, press right. 

c00ic626w.eps 

5. Throttle To increase speed, move 

forward. 

To decrease speed, move 

rearward. 

CMW

Controls - 42 

Left Console 


Left Console 

1 

t37om006w.eps 

1. Parking brake control 

1. Parking brake control To set brake, pull handle up. 

To release brake, push 

handle down. 

Engaged parking brake disables 

ground drive. 

CMW


Rear Console 

Rear Console 

1 2 

t37om007w.eps 

1. Cruise control selector switch 2. Cruise control rpm dial control 

1. Cruise control selector To turn on, press top. Switch 

indicator and display should 

indicate that cruise mode is 

activated. 

c00ic630w.eps 

To turn off, press top again. 

Switch indicator and display 

should indicate that cruise 

mode is deactivated. 

Turn on cruise control only when: 

• ground drive motor control is in 

low 

• ground drive is in neutral 

Hand and foot controls must be in 

neutral or cruise control switch input 

will be ignored. 

CMW

Controls - 44 


2. Cruise control rpm dial 

control 

RPM 

 

To decrease engine load 

while using cruise control, 

turn clockwise. 

To increase engine load while 

using cruise control, turn 


This typically decreases engine load 

temporarily. 

This typically increases engine load 

temporarily. 

c00ic629w.eps 

CMW


Seat Console 

Seat Console 

2 

1 

t33om002w.eps 

1. Ground drive speed control 2. Attachment speed/direction control 


1. Ground drive speed 

control 

To go faster in either 

direction, move farther from 

neutral. 

To stop, return to center. 

NOTICE: Control does not 

automatically return to neutral. 

IMPORTANT: This control is disabled 

in high gear. 

c00ic631w.eps 

CMW

Controls - 46 


Seat Console 


2. Attachment speed/ 

direction control 

To go faster in either 

direction, move farther from 

neutral. 

To stop, return to center. 

NOTICE: Control does not 

automatically return to neutral. 

c00ic632w.eps 

CMW


Seat Deck 

Seat Deck 

1 

2 

1 

2 

3 

3 4 

4 

5 

t33om003w.eps 

1. Seat belt 

2. Armrest adjustment control 

3. Seat slide control 

4. Seat height adjustment lock 

5. Seat pivot control 


1. Seat belt To fasten, insert latch into 

buckle. Adjust until seat belt 

is low and tight. 

To release, lift top of buckle. 

2. Armrest adjustment 

control 

To raise or lower armrests: 

• Remove knob. 

• Adjust armrest to desired 

position. 

• Replace knob. 

CMW

Controls - 48 


Seat Deck 


3. Seat slide control To slide seat forward or 

backward, pull, then adjust 

seat. 

To lock seat in place, release. 

4. Seat height adjustment 

lock 

To lock seat height, turn 

clockwise. 

To unlock seat height, turn 


5. Seat pivot control To pivot seat to the right, pull. 

To lock seat in position, 

release. 

To return seat to front-facing 

position, swing seat left. 

Seat pivots only to the right and can 

be locked in any position from 0-90°. 

IMPORTANT: Drive tractor with 

operator’s seat facing front. If desired, 

operate rear attachments with seat 

pivoted. 

CMW


Trencher Controls 


1 2 3 

t37om008w.eps 

1. Trencher slide control* 

2. Trench cleaner lift control* 

3. Boom lift control 

*optional 


1. Trencher slide control 

(H911 only) 

To slide trencher right, push. 

To slide trencher left, pull. 

c00ic198h.eps 

CMW

Controls - 50 




2. Trench cleaner lift 

control 

To lower, push. 

To raise, pull. 

3. Boom lift control To lower, push. 


CMW


Plow Controls 

Plow Controls 

1 2 3 4 

t37om009w.eps 

1. Plow swing control 

2. Blade steer control 

3. Plow lift control 

4. Stow lock control 


1. Plow swing control To swing left, pull. 

NOTICE: 

c00ic202h.eps 

To swing right, push. 

To float, push to end. 

• If soil conditions allow, operate in 

float position. 

• Lower plow into ground before 

moving control to float position. 

• Do not raise plow with control in 


CMW

Controls - 52 


Plow Controls 


2. Blade steer control To steer right, push. 

To steer left, pull. 

c00ic203h.eps 

3. Plow lift control To raise, pull. 



NOTICE: 





c00ic204h.eps 

4. Stow lock control To lock: 

• Raise plow fully. 

• Pull stow lock handle. 

• Lower plow slightly to 

engage lock. 

Use this control to lock plow in the up 

position. 

c00ic643w.eps 

To unlock: 

• Raise plow slightly. 

• Push stow lock handle to 

release lock. 

CMW


Combo Controls 


1 2 3 4 5 6 

t37om010w.eps 

1. Plow swing control 

2. Blade steer control 

3. Plow lift control 

4. Boom lift control 

5. Plow stow lock control 

6. Trench / Plow switch 


1. Plow swing control To swing left, pull. 

NOTICE: 

c00ic202h.eps 

To swing right, push. 






• Do not raise plow with control in 


CMW

Controls - 54 



2. Blade steer control To steer right, push. 

To steer left, pull. 

c00ic203h.eps 

3. Plow lift control To raise, pull. 



NOTICE: 





c00ic204h.eps 

4. Boom lift control To lower, push. 


5. Plow stow lock control To lock: 

• Raise plow fully. 


• Lower plow slightly to 

engage lock. 

Use this control to lock plow in the up 

position. 

c00ic643w.eps 

To unlock: 

• Raise plow slightly. 


release lock. 

CMW



6. Trench / Plow switch To trench, set switch to trench 

position. 

To plow, set switch to plow 

position. 

CMW

Controls - 56 

Backhoe Console 



t37om046w.eps 

1. Remote backfill blade control* 

2. Left stabilizer control 

3. Boom/Swing control 

4. Remote throttle control switch 

5. Remote throttle enable switch 

6. Work light switch* 

7. Swing lock pin 

8. Ground drive switch 

9. Remote engine stop switch 

10. Bucket/Dipper control 

11. Stow lock control 

12. Right stabilizer control 

*optional 

CMW




1. Remote backfill blade 

control 



2. Left stabilizer control To lower, push out. 

To raise, pull in. 

3. Boom/Swing control To swing boom left, move left. 

To swing boom right, move 

right. 

To raise boom, pull. 

To lower boom, push. 

Control can perform more than one 

action at a time. By “feathering” the 

control, operator can combine 

backhoe operations. 

NOTICE: Do not operate with 

backhoe in the stowed (upright) 

position. 

4. Remote throttle To increase engine speed, 

press top. 

To decrease engine speed, 

press bottom. 

c00ic029w.eps 

CMW

Controls - 58 




5. Remote throttle enable To enable remote throttle 

control, press top. 

To disable remote throttle 

control, press bottom. 

Note: This switch must be returned to 

the OFF position for normal throttle 

control at tractor. 

c00ic030w.eps 

6. Work light switch To turn on, press right. 

To turn off, press left. 

7. Swing lock pin To lock: 

• Engage stow lock. 

• Insert swing lock pin into 

hole (1). 

To release: 

• Remove pin and store in 

hole (2). 

• Release stow lock. 

This pin locks boom from swinging 

during transport. 

NOTICE: Do not store pin in holes 

marked with an “X.” Backhoe could 

swing and destroy pin. 

8. Remote ground drive 

control 

c00ic216h.eps 

To move tractor forward, 

push. 

To move tractor backward, 

pull. 

NOTICE: 

• This control is disabled if tractor 

seat is occupied. 

• Tractor must be in low speed for 

remote ground drive to function. 

• Ensure that backfill blade, if 

equipped, and stabilizers are 

raised before operating this 

control. 

• Do not move more than 30’ (10 

m) at a time. 

CMW




9. Remote engine stop 

switch 

Press to stop engine 

immediately. 

For normal engine shutdown, use 

ignition switch. 

Note: This switch must be returned to 

the UP position to allow engine 

restarting. 

10. Bucket/Dipper control To open bucket, move right. 

To close bucket, move left. 

To move dipper in, pull. 

Control can perform more than one 

action at a time. By “feathering” the 

control, operator can combine 

backhoe operations. 

To move dipper out, push. 

11. Stow lock control To lock: 

• Raise boom fully. 


• Lower boom slightly to 

engage lock. 

• Insert swing lock pin. 

To unlock: 

• Remove swing lock pin. 

• Raise boom slightly. 


release lock. 

Use this control to lock boom in the up 

position. 

NOTICE: Always use stow lock and 

install swing lock pin during transport. 

When unlocked, store swing lock pin 

in holder located on left stabilizer 

support. 

12. Right stabilizer control To lower, push out. 

To raise, pull in. 

CMW

Controls - 60 

Saw Controls 


Saw Controls 

1 2 

t37om045w.eps 

1. Saw slide control 2. Saw lift control 


1. Saw slide control To slide saw right, push. 

To slide saw to center, pull. 

CMW



2. Saw lift control To lower, push. 


c00ic209h.eps 

CMW

Controls - 62 

Drill Controls 


Drill Controls 

1 

2 

t33om063w.eps 

1. Drilling attachment control 2. Drilling attachment 


1. Drilling attachment 

control 

c00ic655w.eps 

To rotate clockwise, press 

bore. 

To rotate counterclockwise, 

press reverse. 

IMPORTANT: Always rotate 

clockwise during drilling and 

backreaming. Rotate 

counterclockwise only to dislodge a 

dry bore bit or reamer that has seized 

in the bore hole. 

Switch should return to neutral 

position when released. 

CMW


Battery Disconnect 

Battery Disconnect 

1 

t37om011w.eps 

1. Battery disconnect switch 


1. Battery disconnect 

switch 

To connect, move left. 

To disconnect, move right. 

NOTICE: Do not operate battery 

switch with engine running. 

c00ic654w.eps 

CMW

Controls - 64 


CMW

RT120Q Operator’s Manual Operation Overview - 65 


Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 

Trenching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 

Plowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 

Drilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 

Digging with Backhoe . . . . . . . . . . . . . . . . . . . . . . 67 

Sawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 

Leaving Jobsite. . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 

Operation Overview 

CMW

Operation Overview - 66 

Planning 


Planning 

1. Gather information about jobsite. See page 70. 

2. Inspect jobsite. See page 71. 

3. Classify jobsite. See page 72. 

4. Select chain and teeth to match your soil type, if necessary. See page 140 

5. Check supplies and prepare equipment. See page 74. 

6. Haul equipment to jobsite. See page 88. 

Trenching 

1. Start unit. See page 76. 

2. Position tractor and controls. See page 94. 

3. Begin trenching. See page 96. 

4. Engage cruise control if desired. See page 138. 

5. Complete the installation. See page 99. 

6. Shut down tractor. See page 80. 

Plowing 



• offset plowing - page 109 

• coordinated plowing - page 109 

• crabbing - page 109 

3. Attach product. See page 103. 

4. Begin plowing. See page 105. 

5. Engage cruise control if desired. See page 138. 



Drilling 


2. Dig approach trench and target trench. See page 123. 

3. Assemble drill string and position tractor. See page 124. 

CMW

RT120Q Operator’s Manual Operation Overview - 67 

Digging with Backhoe 

4. Begin drilling. See page 125. 

5. Use drill string guide as needed. See page 126. 

6. Add rod. See page 127. 

7. Backream. See page 127. 


9. Disassemble joints. See page 128. 

Digging with Backhoe 


2. Set stabilizers and unstow backhoe. See page 116. 

3. Excavate. See page 117. 

4. Stow backhoe properly. See page 118. 


Sawing 



3. Begin sawing. See page 132. 


5. Backfill the trench. See page 144. 


Leaving Jobsite 

1. Backfill if necessary. See page 144. 

2. Rinse equipment. See page 144. 

3. Stow tools. See page 144. 

4. Haul equipment from jobsite. See page 88. 

CMW

Operation Overview - 68 


Leaving Jobsite 

CMW

RT120Q Operator’s Manual Prepare - 69 


Gather Information . . . . . . . . . . . . . . . . . . . . . . . . . 70 

• Review Job Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 

• Notify One-Call Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 

• Arrange for Traffic Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 

• Plan for Emergency Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 

Inspect Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 

• Identify Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 

Classify Jobsite. . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 

• Inspect Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 

• Select a Classification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 

• Apply Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 

Check Supplies and Prepare Equipment . . . . . . . 74 

• Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 

• Fluid Levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 

• Condition and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 

• Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 

Prepare 

CMW

Prepare - 70 

Gather Information 


Gather Information 

A successful job begins before you dig. The first step in planning is reviewing information already available 

about the job and jobsite. 

Review Job Plan 

Review blueprints or other plans. Check for information about existing or planned structures, elevations, or 

proposed work that may be taking place at the same time. 

Notify One-Call Services 

Contact your local One-Call (811 in USA) or the One-Call referral number (888-258-0808 in USA and 


participate in the One-Call service. 

Arrange for Traffic Control 

If working near a road or other traffic area, contact local authorities about safety procedures and 

regulations. 

Plan for Emergency Services 

Have the telephone numbers for local emergency and medical facilities on hand. Check that you will have 

access to a telephone. 

CMW


Inspect Site 

Inspect Site 

Inspect jobsite before transporting equipment. Check for the following: 

• changes in elevation such as hills or other open trenches 

• obstacles such as buildings, railroad crossings, or streams 

• signs of utilities 

• traffic 

• access 

• soil type and condition 

Identify Hazards 

Identify safety hazards and classify jobsite. See “Classify Jobsite” on page 72. 



equipment. 

To Help Avoid Injury: 

• Wear personal protective equipment including hard hat, safety eye wear, and hearing protection. 

• Do not wear jewelry or loose clothing. 

• Notify One-Call and companies which do not subscribe to One-Call. 

• Comply with all utility notification regulations before digging or drilling. 

• Verify location of previously marked underground hazards. 

• Mark jobsite clearly and keep spectators away. 

Remember, jobsite is classified by hazards in place -- not by line being installed. 

CMW

Prepare - 72 

Classify Jobsite 



Inspect Jobsite 

• Follow U.S. Department of Labor regulations on excavating and trenching (Part 1926, Subpart P) and 

other similar regulations. 

• Contact your local One-Call (811 in USA) or the One-Call referral number (888-258-0808 in USA and 


participate in the One-Call service. 

• Inspect jobsite and perimeter for evidence of underground hazards, such as: 

– “buried utility” notices 

– utility facilities without overhead lines 

– gas or water meters 

– junction boxes 

– drop boxes 

– light poles 

– manhole covers 

– sunken ground 

• Have an experienced locating equipment operator sweep area within 20’ (6 m) to each side of trench 

path. Verify previously marked line and cable locations. 

• Mark location of all buried utilities and obstructions. 

• Classify jobsite. 

Select a Classification 

Jobsites are classified according to underground hazards present. 

If working . . . then classify jobsite as . . . 

within 10’ (3 m) of a buried electric line 

within 10’ (3 m) of a natural gas line 

in sand, granite, or concrete which is capable of producing 

crystalline silica (quartz) dust 

within 10’ (3 m) of any other hazard 

electric 

natural gas 

crystalline silica (quartz) dust 

other 

NOTICE: If you have any doubt about jobsite classification, or if jobsite might contain unmarked 

hazards, take steps outlined previously to identify hazards and classify jobsite before working. 

CMW



Apply Precautions 

Once classified, precautions appropriate for jobsite must be taken. 

Electric Jobsite Precautions 

Use one or both of these methods. 

• Expose line by careful hand digging or soft excavation. 

• Have service shut down while work is in progress. Have electric company test lines before returning 

them to service. 

Natural Gas Jobsite Precautions 

In addition to positioning equipment upwind from gas lines, use one or both of these methods. 

• Expose lines by careful hand digging or soft excavation. 

• Have gas shut off while work is in progress. Have gas company test lines before returning them to 

service. 

Crystalline Silica (Quartz) Dust Precautions 

Crystalline silica dust is a naturally occurring substance found in soil, sand, concrete, granite, and quartz. 

Breathing silica dust particles while cutting, drilling, or working materials may cause lung disease or 

cancer. To reduce exposure: 

• Use water spray or other means to control dust. 

• Refer to U.S. Department of Labor Occupational Safety and Health Administration guidelines to learn 

more about appropriate breathing protection and permissible exposure limits. 

Other Jobsite Precautions 

You may need to use different methods to safely avoid other underground hazards. Talk with those 

knowledgeable about hazards present at each site to determine which precautions should be taken or if 

job should be attempted. 

CMW

Prepare - 74 

Check Supplies and Prepare Equipment 

Supplies 

• fuel 

• keys 

• personal protective equipment, such as hard hat and safety glasses 

Fluid Levels 

• fuel 

• hydraulic fluid 

• battery charge 

• engine oil 

Condition and Function 

• digging chain and teeth 

• brake pads and disc 

• fan belts 

• light bulbs 

• filters (air, oil, hydraulic) 

• tracks 

• pumps and motors 

• hoses and valves 

• signs, guards, and shields 

Accessories 

Fire Extinguisher 


Check Supplies and Prepare Equipment 

If required, mount a fire extinguisher near the power unit but away from possible points of ignition. The fire 

extinguisher should always be classified for both oil and electric fires. It should meet legal and regulatory 

requirements. 

CMW

RT120Q Operator’s Manual Drive - 75 


Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 

Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 

Safe Slope Operation . . . . . . . . . . . . . . . . . . . . . . . 79 

Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 

Drive 

CMW

Drive - 76 

Start Unit 


Start Unit 

Before operating tractor, read engine manufacturer’s starting and operating instructions. Follow 

instructions for new engine break-in. 



To help avoid injury: 

• Read operator’s manual before operating equipment. Follow instructions carefully. Contact Ditch 

Witch dealership for operation information or demonstration. 

• Wear hard hat, safety glasses, and other protective equipment required by job. Do not wear jewelry 

or loose clothing that can catch on controls. 

Runaway possible. Machine could run over you or others. Learn how to 

use all controls. Start and operate only from operator’s position. 

Rollover possible. If machine rolls over, you could be thrown from seat 

and killed or crushed. Wear seat belt. 

CMW


Start Unit 

1. Fasten and adjust seat belt. 

2. Check that ground drive control and attachment speed/direction control are in neutral. 

3. Move throttle to idle. 

4. Verify that parking brake is engaged. 

5. Turn ignition switch to the run position (key on, engine off). Cold start wait indicator will light (if 

equipped). 

Explosion possible. Serious injury or equipment damage could 

occur. Follow directions carefully. 

To help avoid injury: Do not use ether or any other type of aerosol starting fluid when unit is 

equipped with cold start option. 

6. When cold start wait indicator goes off, turn ignition switch all the way clockwise to start tractor. 

Warning alarm will sound. Indicators will light. 

• If engine does not crank, check start interlock display. 

• If engine turns but does not start within 10 seconds, allow starter to cool before trying to start 

again. 

Improper control function could cause death or serious injury. 

To help avoid injury: Stop machine and have it serviced if control does not work 

as described in instructions. 

IMPORTANT: Machine will not start if start interlock requirements are not met. See page 26 for 

start interlock information. 

7. Run engine at half-throttle or less for five minutes before operating tractor. During warmup, check that 

all controls work properly. 

CMW

Drive - 78 

Drive 


Drive 

General Operation 

Moving traffic – hazardous situation. Death or serious injury could result. 

Avoid moving vehicles, wear high visibility clothing, post appropriate warning signs. 


• Drive carefully in congested areas. Know machine’s clearance and turning radius. 

• Keep attachments low when operating on slope. Drive slowly and cautiously. 

EMERGENCY SHUTDOWN: Turn ignition switch to STOP. 

1. Turn on lights as needed. 

2. Raise backfill blade and all attachments. 

3. Release parking brake. 

4. Adjust throttle. 

5. When operating in low or medium: 

• if using the hand control, the foot control will only increase speed. 

• any opposing signal from controls causes ground drive to stop. 

6. When operating in high, ground drive stops if hand control is moved out of neutral position. 

CMW


Drive 

Safe Slope Operation 

Tipover possible. Machine can tip over and crush you. 


• Always operate with heavy end uphill. 

• Drive cautiously at all times. 

• Never jerk control levers. Use a steady even motion. 

• Do not park unit on slope without lowering digging attachment to the ground, returning all controls 

to neutral position, shutting down unit, and applying parking brake. 

Operating safely on a slope depends upon many factors including: 

• Distribution of machine weight, including front loading and absence of load 

• Height of load 

• Even or rough ground conditions 

• Potential for ground giving way causing unplanned tilt forward, reverse or sideways 

• Nearness of ditches, ruts, stumps or other obstructions and sudden changes in slope 

• Speed 

• Turning 

• Braking performance 

• Operator skill 

These varying factors make it impractical to specify a maximum safe operating angle in this manual. It is 

therefore important for the operator to be aware of these conditions and adjust operation accordingly. 

Maximum engine angle and braking performance are two absolute limits which must never be exceeded. 

These maximums are stated below since they are design limits. These design limits usually exceed the 

operating limits and must never be used alone to establish safe operating angle for variable conditions. 

Maximum engine lubrication angle – 30° 

Maximum service brake retarding force – equal to traction of both tracks. 

Maximum secondary brake retarding force – equal to traction of one track. 

Maximum park brake holding force – equal to traction of both tracks. 

CMW

Drive - 80 

Shut Down 


Shut Down 

1. When job is complete, move ground drive control to neutral. 

2. Engage parking brake and verify parking brake indicator is on. 

3. Lower all attachments to ground and let machine idle for three minutes to cool. 

4. Turn ignition switch to STOP. If leaving machine unattended, remove key. 

5. For maintenance or long-term storage, turn battery disconnect switch to disconnect position. 

CMW

RT120Q Operator’s Manual Transport - 81 


Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 

• Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 

Tie Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 

• Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 

Haul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 

Tow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 

Transport 

CMW

Transport - 82 

Lift 


Lift 

Crushing weight. If load falls or moves it could kill or crush you. Use 




Points 

Lifting points are identified by lifting decals. Lifting at other points is unsafe 

and can damage machinery. 

Procedure 

Tractor 

This machine is not configured for lifting. If the machine must be lifted, load machine into a container or 

onto a platform appropriate for lifting. See “Specifications” on page 187 for size and weight of machine. 

CMW


Lift 

Centerline Trencher 

Use crane capable of supporting the 

equipment's size and weight. See 

“Specifications” on page 187 or measure and 

weigh equipment before lifting. 

Traversing Trencher 





Combo 

Use crane capable of supporting the equipment’s 

size and weight. See “Specifications” on 

page 187 or measure and weigh equipment 

before lifting. 

CMW



Lift 

Plow 





Reel Carrier 


equipment's size and weight. See page 187 or 

measure and weigh equipment before lifting. 

CMW


Tie Down 

Tie Down 



Points 

Tiedown points are identified by tiedown decals. Securing to trailer at other 

points is unsafe and can damage machinery. 

Procedure 

Tractor 

Attach chains at front and rear tiedown points. 

Make sure chains are tight before transporting 

unit. 

t37om012w.eps 

Centerline Trencher 

Lower trencher to trailer deck and chain at 

attachment frame and through boom. Make 

sure chains are tight before transporting. 

IMPORTANT: If trencher is equipped with 

a trench cleaner, ensure that trench 

cleaner shoe is fully up and extra bolt 

(found in operator’s manual compartment) 

is installed in appropriate hole for 

additional support. 

CMW



Tie Down 

Traversing Trencher 

Lower trencher to trailer deck and chain at 

attachment frame and through boom. Make 

sure chains are tight before transporting. 

IMPORTANT: If trencher is equipped with 

a trench cleaner, ensure that trench 

cleaner shoe is fully up and extra bolt 

(found in operator’s manual compartment) 

is installed in appropriate hole for 

additional support. 

Combo 

Lower attachment to trailer deck and chain at 

attachment frame and vibrator box. Make sure 

chains are tight before transporting. 

NOTICE: 

• Engage attachment stow lock and swing 

lock devices in addition to securing at 

tiedowns. 

• Unsecured plow can swing outside the 

trailer and become a traffic hazard. Lower 

plow and chain to trailer deck before 

hauling. 

• If trencher is equipped with a trench 

cleaner, ensure that trench cleaner shoe 

is fully up and extra bolt (found in 

operator’s manual compartment) is 

installed in appropriate hole for additional 

support. 

CMW


Tie Down 

Plow 

Lower plow to trailer deck and chain at 

attachment frame and vibrator box. Make sure 

chains are tight before transporting. 

NOTICE: 

• Engage attachment stow lock and 

swing lock devices in addition to 

securing at tiedowns. 

• Unsecured plow can swing outside 

the trailer and become a traffic 

hazard. Lower plow and chain to 

trailer deck before hauling. 

Reel Carrier 

Lower reel carrier to lowest position and tie down 

at attachment arms. Make sure chains are tight 

before transporting. 

CMW


Haul 


Haul 




• Read trailer operator’s manual before loading or transporting your machine. Incorrectly loaded 

machine can slip or cause trailer sway. 

• Ensure that tow vehicle has proper tow capacity rating. 

• Attach trailer to tow vehicle before loading or unloading. 

• Park, load, and unload trailer on level ground. 

• Check that unit and trailer do not exceed size or weight regulations. 

• Load trailer correctly to avoid trailer sway. Ten to fifteen percent of total vehicle weight (equipment 

plus trailer) must be on tongue to help prevent trailer sway. 

• Connect safety chains to tow vehicle. Attach left chain to right side of tow vehicle and vice versa to 

cradle hitch. Do not connect to pintle hook or hitch ball. 

• Connect breakaway switch cable to tow vehicle. Do not connect to pintle hook or hitch ball. 

Procedure 

Inspect Trailer 

1. Check hitch for wear and cracks. Lubricate if needed. 

2. Check battery for 12V charge. 

3. Inspect lights for cleanliness and correct operation. Inspect reflectors and replace if needed. 

4. Check trailer tire pressure. Check lug nut torque with a torque wrench. Adjust if needed. 

5. Ensure trailer brakes are adjusted to come on in synchronization with tow vehicle brakes. 

6. Check ramps and trailer bed for cracks. 

CMW


Haul 

Load 





• Load and unload trailer on level ground. 

• Block trailer wheels. 

• Put ground drive control into neutral. Turn off ignition. Set parking brake. 




2. Tilt steering column down. 

3. Start tractor. See page 76 for proper start-up procedures. 

4. Raise attachments, but keep them low and centered. Check that they are not in float. 

5. Release parking brake and verify that parking brake indicator is off. 

6. Move ground drive switch to low. 

7. Slow engine to low throttle and slowly drive tractor onto trailer. 

8. Position tractor on trailer deck for proper weight distribution. 

9. Engage parking brake and verify that parking brake indicator is on. 

10. Lower attachments to trailer bed and turn tractor off. See page 80 for proper shutdown procedures. 

11. Attach chains to tractor and attachments where tiedown decals are located. See page 85. 

CMW



Haul 

Unload 



NOTICE: 


• Load and unload trailer on level ground. 

• Block trailer wheels. 



1. Lower trailer or ramps. 

2. Check that parking brake is engaged and verify that parking brake indicator is on. 

3. Check that ground drive controls are in neutral. 

4. Remove chains from tiedowns. 


6. Tilt steering column down. 

7. Start tractor. See page 76 for proper start-up procedures. 

8. Raise attachments, but keep them low and centered. Check that they are not in float. 

9. Release parking brake and verify that parking brake indicator is off. 

10. Slow engine to low throttle and slowly back unit down trailer or ramps. 

CMW


Tow 

Tow 



Under normal conditions, tractor should not be towed. If tractor becomes disabled and towing is 

necessary: 

• Do not tow for more than 200 yd (180 m). 

• Tow at less than 1 mph (1.6 km/h). 

• Steering will be very difficult. 

Procedure 

1. Engage parking brake. 

2. Block front and rear tracks to prevent unit 

from rolling. 

3. Attach tow line to all available tie-down 

points facing towing vehicle. 

4. Activate the tow valve (shown). 

• Remove floor plate. 

• Locate two hex-shaped relief valves. 

• Turn each valve (whole hex) 

counterclockwise three complete 

revolutions. 

t37om013w.eps 

NOTICE: Do not turn tow valve 

more than three revolutions. 

• Replace floor plate. 

5. Remove blocks. 

6. Fasten seat belt and adjust seat belt. 

7. Disengage parking brake. 

Warning: While towing, unit will not have brakes. 

8. After towing, turn tow valve clockwise three complete revolutions. 

CMW



Tow 

CMW

RT120Q Operator’s Manual Trench - 93 


Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 

Trench 

CMW

Trench - 94 

Setup 


Setup 

EMERGENCY SHUTDOWN - Turn ignition switch to STOP. 

Crushing weight could cause death or serious injury. Use proper 

procedures and equipment or stay away. 

To help avoid injury: Use attachments or counterweights to make front and rear loads balance when all 

attachments are raised. Contact your Ditch Witch dealer about counterweighting for your equipment. 



equipment. 

To help avoid injury: Comply with all utility notification regulations before digging or drilling. 

Incorrect procedures can result in death, injury, or property damage. 


NOTICE: The RT120Q is programmed to operate with the original attachment (trencher or plow) 

configuration. If you change attachments, contact your Ditch Witch dealer to make sure the electronic 

programming is updated. If you change attachments without updating the electronic programming, your 

attachment may not function correctly. 

CMW


Setup 

1. If using optional trench cleaner, remove bolt installed for transport. 


3. Start tractor. See page 76 for start-up procedures. 

4. Drive to starting point. Move in line with planned trench. See page 78 for driving procedures. 



7. Turn seat to the desired position. 

8. Engage axle lock. 

9. Lower boom to just above ground. 

10. Check that attachment speed/direction control is in neutral. 

11. Check that boom is in line with planned trench. 

CMW

Trench - 96 

Operation 


Operation 





• Notify companies that do not subscribe to One-Call. 

Breathing crystalline silica dust may cause lung disease. Cutting, drilling, 

or working materials such as concrete, sand, or rock containing quarts may result in 

exposure to silica dust. Use dust control methods or appropriate breathing protection 

when exposed to silica dust. 

Electrical shock. Contacting electrical lines will cause death or serious 

injury. Know location of lines and stay away. 

To help avoid injury: Expose lines by hand before digging. Cutting high voltage cable can 

cause electrocution. 

Flying objects thrown by machine may strike people. Wear hard hat and 

safety glasses. 

CMW


Operation 

Start Trench 

1. Lower backfill blade, if equipped, to reduce shock when trenching begins. 

2. If equipped with combo, set trench/plow switch to the trench position. 

3. Move attachment speed/direction control to desired speed. DIGGING CHAIN WILL MOVE. 

Moving digging teeth will cause death or serious injury. Stay away. 


• Machine might jerk when digging starts. Allow 3’ (1 m) between digging teeth and obstacle. 

• Keep everyone at least 6’ (2 m) from machine, attachments, and their range of movement. 

4. Set throttle to full engine speed. 

5. Lift trench cleaner, if equipped. 

6. Slowly lower digging boom to desired trench depth. 

CMW

Trench - 98 


Operation 

Move Forward 

1. Raise backfill blade, if equipped. 

2. Release parking brake, if set, and verify parking brake indicator is off. 

3. If using trench cleaner: 

• Use ground drive foot control to move forward about 1 foot (30 cm), or until there is enough room 

for trench cleaner to enter trench. 

• Return ground drive control to neutral to stop forward movement. 

• Raise boom slightly, then fully lower trench cleaner to lock it in place. 

• Lower boom to desired trench depth. 

NOTICE: 

• Do not have trench cleaner in working position when starting a trench. 

• Do not back up with trench cleaner in working position. 

• Do not use trench cleaner in working position in conditions where large rocks can get 

between chain and cleaner. 

4. Move ground drive hand control to desired speed. Always start trenching with ground drive speed set 

at low. Increase ground drive speed only as soil conditions permit. 

IMPORTANT: 

• Ground drive speed/direction can be controlled with foot pedal or hand lever. When 

trenching, set ground drive speed with hand lever. Use foot pedal to temporarily adjust 

speed if digging conditions change for a short distance. 

• For cruise control operation, see page 138. 

5. Operate engine at full throttle when working. 

NOTICE: 

• Do not make sharp turns. Lower boom to full depth when turning. 

• If an object becomes lodged in chain, move attachment speed/direction control to neutral 

and raise boom slightly. Reverse chain direction. If object must be removed manually, turn 

engine off and engage parking brake. 

CMW


Operation 

Finish Trenching 

1. When trench is complete, move ground drive hand control to neutral. 

2. Adjust throttle to low idle. 

3. Raise boom. 

4. As boom clears top of trench, move attachment speed/direction control to neutral. 

5. Raise trench cleaner. 

6. Swivel seat to the drive position. 

7. Disengage axle lock. 

IMPORTANT: Drive tractor in reverse 6’ (2 m) while turning steering wheel left to right to fully 

disengage axle lock. 

8. Drive a short distance away from work site. See page 78 for driving procedures. 

9. Shut down tractor. See page 80 for proper shutdown procedures. 

10. Stow trench cleaner. 

CMW

Trench - 100 


Operation 

CMW

RT120Q Operator’s Manual Plow - 101 


Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 

• Position Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 

• Attach Product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 

• Special Plowing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 

Plow 

CMW

Plow - 102 

Setup 


Setup 




To help avoid injury: Keep everyone at least 6’ (2 m) from machine, attachments, and their range of 

movement. 



equipment. 






NOTICE: 

• Do not operate vibrator unless plow is in the ground. 

• The RT120Q is programmed to operate with the original attachment (trencher or plow) 

configuration. If you change attachments, contact your Ditch Witch dealer to make sure the 

electronic programming is updated. If you change attachments without updating the electronic 

programming, your attachment may not function correctly. 

CMW


Setup 

Position Tractor 

IMPORTANT: If material must be at a constant depth, dig starting and target trenches. 



3. Drive to starting point. Move in line with planned trench. 


5. Lower backfill blade, if equipped. 

6. If equipped with combo, set trench/plow switch to the plow position. 

7. Lower plow to starting point of trench. 

8. Turn ignition switch to STOP. 

Attach Product 

To Pull Product 

1. Insert material into pulling grip. 

2. Tape grip with duct tape. 

CMW

Plow - 104 


Setup 

To Feed Product 

IMPORTANT: ROPS-attached cable guide 

should be a genuine Ditch Witch cable guide 

manufactured for this purpose. 

1. Remove cable guide. 

2. Feed cable through tube from top to 

bottom. 

3. Replace cable guide and tighten 

fasteners. 

4. Secure cable. 

CAUTION: Keep everyone away 

from material being installed. 

CMW


Operation 

Operation 





• Notify companies that do not subscribe to One-Call. 


or working materials such as concrete, sand, or rock containing quarts may result in 









NOTICE: Do not drive backward with plow in the ground. 

CMW

Plow - 106 

Prepare 


Operation 


2. Start tractor. 


4. Check that ground drive hand and foot controls are in neutral. 

5. Release parking brake and verify parking brake indicator is off. 


7. Lower reel carrier to lowest position possible, if equipped. 

NOTICE: Use extreme caution when operating reel carrier on sloped surfaces. 


9. Swivel seat to the desired position. 


CMW


Operation 

Lower Plow 

1. If equipped with combo, ensure that the trench/plow switch is in the plow position. 

2. Move ground drive hand control forward to plowing speed and lower plow blade into ground. 

NOTICE: 

• Lower plow into ground before moving plow lift control or plow swing control to float. 

• Do NOT move ground drive to reverse with plow blade in the ground. 

3. Move plow lift control to float. 

4. Move plow swing control to float. 

5. Increase engine speed to full throttle. 

IMPORTANT: Keep sod cutter edge sharp when plowing in areas with heavy grass cover or 

surface clutter. 

6. Move attachment speed/direction control forward to start plow vibration. PLOW WILL VIBRATE. 

7. Reduce attachment speed to a point with the least tractor vibration and the highest ground drive speed 

possible without track slippage. Adjust vibrator speed if ROPS vibrates excessively. 

Note: In some soil conditions, changing vibrator weights can improve plow performance. 

Contact your Ditch Witch dealer for details. 

8. Check cable for damage during plowing. Run continuity checks on electric cable and check pipe 

pressure. Damage can result from improper operation, incorrect blade choice, striking underground 

obstructions, or other conditions. 

CMW

Plow - 108 

Finish Plowing 


Operation 

1. When installation is complete, move plow swing out of float. 

2. With vibrator running, raise plow to ground level. 

NOTICE: Do not operate vibrator when plow is out of the ground. This will cause excessive 

vibration resulting in rapid wear, and possible damage to the unit and product being installed. 

3. Move attachment speed/direction control to neutral. 




7. Turn ignition switch to STOP and remove product from plow. 

8. Swing plow to center position and engage swing lock and stow lock. 





11. Drive a short distance away from work site. 

12. Shut down tractor. See page 80 for proper shutdown procedures. 

CMW


Operation 

Special Plowing 

Your Ditch Witch equipment allows you to 

plow four ways: normal plowing, offset plowing 

(1), coordinated plowing (2), and crabbing (3). 

NOTICE: Oversteering blade may damage 

blade or cable. 

Offset Plow 

Offset plowing can be used to plow next to a 

road while keeping tracks on a more stable surface or in similar conditions. 

1. Use plow swing to move plow to planned trench line. 

2. Use blade steer to position blade parallel to direction of tractor frame. 

Coordinated Plow 

Coordinated plowing can be used to turn a tight circle around a jobsite obstacle or in similar conditions. 

1. Move rear steer/center switch to the rear steer position. 

2. Use the rear steer switch to position the tracks as shown above (2). 

3. Slowly move tractor forward. 

4. Plow as normal. 

IMPORTANT: When coordinated plowing, keep plow blade straight or in the same angle position as rear 

tracks. 

Crab Plow 

Crab can be used to plow along edge of jobsite or in similar conditions. 

1. Move rear steer/center switch to the rear steer position. 

2. Use the rear steer switch to position the tracks as shown above (3). 

3. Slowly move tractor forward. 

4. Plow as normal. 

CMW

Plow - 110 


Operation 

CMW

RT120Q Operator’s Manual Reel Carrier - 111 


Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 

• Adjust Reel Winder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 

Reel Carrier 

CMW

Reel Carrier - 112 

Setup 


Setup 



Adjust Reel Winder 

1. Lower reel carrier. 


3. Remove reel. 

Crushing weight could cause death or serious 

injury. Use proper procedures and equipment or stay away. 

4. While supporting lever arm (3), remove 

bolt (1) that attaches hydraulic lift cylinder 

to lever arm. 

5. Attach cylinder rod to the correct mounting 

hole for your diameter reel: 

• For 2-5’ (61-152 cm) diameter reels, 

attach to bottom mounting hole (1). 

• For 5-7’ (152-213 cm) diameter reels, 

attach to top mounting hole (2). 

CMW

RT120Q Operator’s Manual Reel Carrier - 113 

Operation 

Operation 


1. Drive to beginning of planned plow path. 

2. Engage parking brake. 


4. Lower plow attachment. 


6. Attach service line to reel. 

away. 

Moving parts could cut off hand or foot. Stay 

7. Move reel winder selector switch to activate reel winder control functions. 

8. Lower reel winder arm until track meets reel flange. 

9. Wind service line. 

10. When finished winding, raise reel winder arm. 


12. Move reel winder selector switch to activate backfill blade controls. 



15. Follow directions in “Plow” on page 101 to begin plowing. 

CMW

Reel Carrier - 114 


Operation 

CMW

RT120Q Operator’s Manual Backhoe - 115 


Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 

Stowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 

Backhoe 

CMW

Backhoe - 116 

Setup 


Setup 

1. Move attachment speed/direction control to neutral position. 

2. Move ground drive control to neutral position. 

3. Set ground drive motor speed to low. 

4. Lower rear attachment to 6” (150 mm) above ground. 

5. Check that backfill blade, if equipped is straight and lower it to ground. 

6. Decrease engine speed to low throttle. 

7. Move to backhoe operator’s station. 

8. Lower stabilizers enough to lift front tracks. 

IMPORTANT: For more information about stabilizer controls, see 56. 

9. Remove swing lock pin from hole (1) and 

store in hole (2). 

10. Raise boom to release tension on stow 

lock. 

11. Release stow lock by pushing handle 

forward. 

IMPORTANT: For more information 

about stow lock, see page 51. 

12. Adjust engine speed to 1/2 to 3/4 throttle 

for digging. 

NOTICE: Engine speed affects 

speed of backhoe operation. 

CMW


Operation 

Operation 

Dig 

Use boom/swing control and bucket/dipper control to dig hole or trench. 

IMPORTANT: For more information about backhoe controls, see page 48. 

• Keep dipper and boom at right angles as 

much as possible for maximum power. 

• Keep bucket in line with dipper as much 

as possible. 

• Position bucket so teeth cut soil. As soil is 

cut, curl bucket under dipper. 

• Move dipper and bucket together. 

Increasing engine speed will not increase 

backhoe force. 

Move Unit 

NOTICE: Only use this method to move unit less than 30’ (10 m) at one time. 

1. Raise stabilizers. 


3. Use remote ground drive switch to move unit. 

4. Lower stabilizers. 

5. Set parking brake. 

CMW

Backhoe - 118 

Stow 


Operation 

NOTICE: Before returning to tractor operator station, raise stabilizers, return remote throttle to low idle, 

and stow and lock boom. 

1. When hole or trench is complete, lift boom 

while keeping dipper pointed at ground. 

2. Curl bucket closed and move dipper fully 

toward boom. 

3. Lift boom to highest position and latch 

stow lock. 

4. Lower boom slightly to engage lock. 

5. Engage swing lock. See page 56. 

CMW


Operation 

6. Raise stabilizers. 

7. Return remote throttle to low idle. 

NOTICE: Before returning to tractor 

operator station, raise stabilizers, return 

remote throttle to low idle, and stow and 

lock boom. 

8. Rotate seat into stowed position and 

engage seat lock (shown). 

CMW

Backhoe - 120 


Operation 

CMW

RT120Q Operator’s Manual Drill - 121 


Drilling Attachment. . . . . . . . . . . . . . . . . . . . . . . . 122 

Prepare Jobsite and Equipment . . . . . . . . . . . . . 123 

• Approach Trench. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 

• Target Trench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 

• Drill Rod and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 

Drill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 

• Using Drill String Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 

Add Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 

Backream. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 

Disassemble Joints . . . . . . . . . . . . . . . . . . . . . . . 128 

Drill 

CMW

Drill - 122 

Drilling Attachment 


Drilling Attachment 



• Do not straddle trench or drill pipe while drilling. Keep everybody at least 10’ (3 m) away from drill 

pipe during operation. 

• Keep all persons away from material being installed. If swivel malfunctions, material being installed 

can rotate. 

• Use a guide to align drill rod when starting a bore. Guides are available from your Ditch Witch 

dealership. 



equipment. 

To help avoid injury: Set up warning barriers and keep people away from equipment and jobsite while 

drilling. 



Improper control function could cause death or serious injury. If control 

does not work as described in instructions, stop machine and have it serviced. 


• Do not alter controls. Improper control function can cause serious injury. 

• Do not tape or tie down switch or lever. 

• Stop drilling and turn off power supply if releasing control does not stop turning shaft. Have unit 

repaired. 

CMW


Prepare Jobsite and Equipment 


Approach Trench (1) 

1. Mark path where you intend to drill. 

2. Dig an approach trench (1) along the 

intended bore path. 

IMPORTANT: The approach trench should 

be at least: 

• deep enough for pipe to lay flat and 

enter soil at correct angle 

• 20’ (6 m) long 

• 4” (100 mm) wide 

Target Trench (2) 

1. Select a completion point for the drilling 

project. 

2. Dig a target trench (2) across the 

anticipated completion point. 

IMPORTANT: 

• The actual length of the target trench depends on soil conditions and length of pipe sections. Make 

it deep enough for drill bit to enter slightly above the trench floor. 

• An alternative to digging a target trench is to use an electronic tracker to locate the bit, then dig 

down with posthole diggers. This method may be desirable to minimize surface soil disturbance. 

CMW

Drill - 124 

Drill Rod and Equipment 



1. Assemble at least 20’ (6 m), but not more than 30’ (9 m), of drill rod. 

NOTICE: More than 10-15’ (3-4.5 m) of drill rod out of the trench increases the tendency of drill 

rod to bend. 

2. Install drill bit to the cutting end of the drill string. 

3. Put drill string in approach trench. 

4. Move tractor to the approach trench and align the drilling attachment with the intended bore path. 

5. Turn off engine. 

6. Attach drill string to drilling attachment. 

CMW


Drill 

Drill 

EMERGENCY SHUTDOWN: Release drilling control and turn ignition switch to STOP. 

1. Start tractor’s engine and begin clockwise (forward) rotation. 

2. Slowly advance tractor while maintaining clockwise rotation. 

NOTICE: 

• Drilling too quickly causes bit to drift off course and may bend drill rod. After bore path is 

established, speed may be slightly increased. 

• If drill rod starts to bend, stop forward movement of unit and back the unit slightly until rod 

straightens. Do not drill with bent rod. 

• If drill rod hits an obstruction, rotate drill string counterclockwise to back up slightly. 

CMW

Drill - 126 

Using Drill String Guide 


Drill 



• Do not straddle trench or drill rod while drilling. Keep everybody at least 10’ (3 m) away from drill rod 

during operation. 

• Use a drill string guide to align drill rod when starting a bore. Guides are available from your Ditch 

Witch dealership. 

Use drill string guide to align drill string as it 

enters the soil. When using drill string guide, 

follow these guidelines: 

• Use only approved Ditch Witch drill string 

guide (p/n 179-737). 

• Stand only on the left side of the approach 

trench. 

• Keep drill string guide at least 3’ (1 m) 

behind bit. 

• Use drill string guide to control only the first 

5’ (1.5 m) of the bore path. 

• After drilling 5’ (1.5 m), stop unit and 

remove drill string guide. 

• Do not use drill string guide during 

backreaming or any time the drill string is 

being pulled back. 

CMW


Add Rod 

Add Rod 

IMPORTANT: It is recommended that a helper be used to add drill rod. 

1. Use control to stop drilling attachment. 

2. Use ground drive controls to back up unit 6” (150 mm) to loosen drill rod in ground. 

3. Disconnect drill rod from drilling attachment. 

4. Use ground drive controls to move unit away from bore. 

5. Add one drill rod to continue bore. 

• Have a helper direct unit operator to align drilling attachment with new rod and stop when drilling 

attachment and rod are 1” (25 mm) apart. 

• Have a helper lightly hold rod and direct unit operator to move unit forward slowly. 

• As soon as rod begins to engage drilling attachment, have helper release rod and move hands 

and arms clear of drilling attachment. 

Backream 

After drill bit enters target trench, the bore hole may be enlarged by changing the drill bit to a backreamer 

and drawing it back through the initial bore. 

1. Turn tractor ignition switch to STOP. 

2. Replace drill bit with backreamer. 

3. Start tractor engine and begin clockwise rotation. 

NOTICE: Always rotate clockwise during backreaming. Rotate counterclockwise only to 

dislodge a dry bore bit or reamer that has seized in the bore hole. 

4. Slowly back up tractor while maintaining rotation. 

5. When backreamer exits the bore hole, stop rotation immediately. 

NOTICE: 

• Do not try to increase hole size too much in one pass. Several passes using successively 

larger reamers will save wear on machine. 

• During backreaming, keep drill string straight. Sharp bends in the drill rod at the motor 

coupling can cause rod failure. 

CMW

Drill - 128 

Disassemble Joints 


Disassemble Joints 

1. Press tab through hole in female side of 

joint (1) using special tool or screwdriver. 

2. Pull rods apart (2). 

CMW

RT120Q Operator’s Manual Saw - 129 


Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 

• Before First Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 

• Normal Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 

Saw 

CMW

Saw - 130 

Setup 


Setup 








equipment. 




Before First Use and After Replacing Bits 

NOTICE: Unless otherwise instructed, all service should be performed with tractor off. 

Check Bit Clearance 

1. Check that all bits are properly secured. 

2. Check that all bit retaining rings are secure. 

3. Spin wheel by hand and listen for bits hitting diverters. 

4. If bits hit diverters, repeat steps 1-3 to make sure bits are in the proper location and secured at proper 

depth. 

5. If bits do not hit diverters: 

• Set parking brake. 

CMW


Setup 

• Fasten and adjust seat belt. 

• Start tractor and adjust throttle. 

• Raise saw slightly. 

• Use attachment speed/direction control to rotate saw slowly. As it rotates, listen for clicking 

sounds. If clicking is present, repeat steps 1-4. 

CMW

Saw - 132 

Operation 


Operation 


or working materials such as concrete, sand, or rock containing quartz may result in 









safety glasses. 

Flying objects thrown by machine may strike people. Wear hard hat and 

Moving digging teeth will kill you or cut off arm or leg. Stay away. 


• Allow 3’ (1 m) between digging teeth and obstacle. Machine might jerk when digging starts. 


CMW


Normal Use 

IMPORTANT: 

• Saw use is not recommended for soft, wet, or sticky soil conditions. 

• Before operating saw, check bits for free rotation. Tap bits lightly with a hammer and turn 

by hand. If bits are stuck, remove and clean packed soil from bit block. 

• For best results, use retaining clip loading and removing tool and a knock-out bar included 

with saw to remove and reinsert bits. 

• Carbide bits are recommended for cutting abrasive material, such as sandstone or frozen 

sands or gravels. 



3. Drive to starting point. Move in line with planned trench. See page 78 for correct operating procedures. 


5. Move gearbox control to 1 (low). 

6. Tilt steering wheel column up. 

7. Swivel seat to the desired position. 


9. Lower saw to just above ground. 

10. Lower stabilizer until distance from bottom of skid shoe to bottom of saw bits equals desired trench 

depth. 

11. Ensure that saw is aligned with planned trench and that tracks are pointing straight ahead. Work slowly 

and carefully. 

CMW

Saw - 134 



2. Move attachment speed/direction control to desired speed. SAW WILL TURN. 

away. 

Moving digging teeth will kill you or cut off arm or leg. Stay 


• Machine might jerk when digging starts. Allow 3’ (1 m) between digging teeth and 

obstacle. 


3. Slowly lower saw to trench depth. 

Incorrect procedures could result in death, injury, or property 

damage. Learn to use equipment correctly. 

To help avoid injury: Ensure that stabilizers are in contact with the ground while sawing. 

Failure to use stabilizers correctly will damage equipment. 

4. Release parking brake and verify parking brake indicator is off. 

5. Increase engine speed to full throttle. 

6. Push ground drive control forward to trenching speed. 

IMPORTANT: 

• Lower saw into softer material then move into harder or abrasive material. For example, 

lower saw into dirt at shoulder before cutting across road. 

• For cruise control operation, see page 43. 

7. If a curved trench must be cut, make a series of straight cuts. 

8. When trench is complete, adjust throttle to low idle. 

9. Raise saw and stabilizers. 

10. As saw clears top of trench, move attachment speed/direction control to neutral. 


12. Tilt steering wheel column down. 

13. Drive a short distance away from work site. 

CMW





15. Shut down tractor. See “Shut Down” on page 80 for correct shutdown procedures. 

16. Wash bits and mounting blocks with high pressure water before parking unit overnight. 

CMW

Saw - 136 


CMW

RT120Q Operator’s Manual Systems and Equipment - 137 


Systems and Equipment 

Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 

• Operate Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 

Chain, Teeth, and Sprockets . . . . . . . . . . . . . . . . 140 

• Chain and Tooth Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 

• Chain Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 

• Chain Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 

Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . 142 

• RT120Q Tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 

• H910/H911 Trencher. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 

• H1032 Plow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 

• H1140 Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 

• A920 Backhoe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Systems and Equipment - 138 

Cruise Control 



Cruise control is a standard feature that allows the unit to automatically adjust ground drive speed 

according to digging conditions. In easier soil conditions, the ground drive speed will increase. When the 

unit encounters difficult soil conditions, the ground drive speed will decrease. The unit does this by 

adjusting ground drive pump output to maintain a preset engine speed. 

Operate Cruise Control 


Plowing 

1. First set the following controls: 

• ground drive controls to neutral 

• ground drive switch to low 

• ensure cruise control is off 

• all other controls set as desired 

2. Set ground drive hand control to maximum speed suitable for digging conditions. 

3. Press cruise control switch once and ensure that cruise control indicator lights. 

4. Use RPM control to select optimum engine speed for digging conditions. 

5. When finished plowing, move ground drive control to neutral and press cruise control switch again to 

turn off cruise control.



Trenching 

1. First set the following controls: 

• ground drive controls to neutral 

• ground drive switch to low 

• ensure cruise control is off 

• all other controls set as desired 

2. Move cruise control RPM control to arrow at center. 

3. Press cruise control switch once and ensure that cruise control indicator lights. 

4. Following procedures on page 96, begin trenching to desired depth. 

5. When desired depth is reached, ensure throttle is fully open. 

6. Slowly move ground drive control forward. 

7. Slowly adjust cruise control RPM control to match digging conditions. 

IMPORTANT: 

• In harder digging conditions, higher cruise control rpm setting may improve digging 

performance. 

• In easier digging conditions, lower cruise control rpm setting may increase ground drive 

speed. 

8. When finished trenching, move ground drive control to neutral and press cruise control switch again to 

turn off cruise control. 

9. Allow chain to dig itself free before stopping attachment.


Chain, Teeth, and Sprockets 



Chain and Tooth Maintenance 

• Always replace sprockets at the same time you replace the digging chain. Sprockets and chain are 

designed to work together. Replacing one without the other will cause premature wear of the new part. 

• Keep digging teeth sharp. Using dull, worn teeth will decrease production and increase shock load to 

other trencher components. It can also cause chain stretch, which leads to premature chain wear and 

failure. 

• Maintain the proper amount of tension on the digging chain. Overtightening will cause chain stretch 

and loss of machine performance. For correct tightening procedure, see page 162. 

• Use the tooth pattern most appropriate for your digging conditions. If you move to a different soil type, 

contact your Ditch Witch dealer for information about the most effective chain type and tooth pattern. 

Chain Types 

Chain type 

4-pitch 

2-pitch 

alternating side bar 

bolt-on adapters 

Shark Chain II 

combination 

Features 

standard chain 

more teeth for smoother cutting 

prevents spoil compaction on chain 

allow easy configuration changes 

versatile, virtually maintenance-free 

provides pick and shovel effect 

Chain Selection 

These charts are meant as a guideline only. No one chain type works well in all conditions. See your Ditch 

Witch dealer for soil conditions and chain recommendations for your area. Ask for the latest Chain, Teeth, 

and Sprockets Parts Catalog. 

• 1 = best 

• 2 = better 

• 3 = good 

• 4 = not recommended 

Chain 

Sandy 

Soil 

Soft Soil 

Medium 

Soil 

Hard Soil 

Rocky 

Soil 

Sticky 

Soil 

4-pitch cup tooth 3 1 2 3 4 1 

2-pitch cup tooth 2 3 1 1 3 4 

bolt-on adaptor, 2-pitch 4 4 3 2 1 4



Chain 

Sandy 

Soil 

Soft Soil 

Medium 

Soil 

Hard Soil 

Rocky 

Soil 

Sticky 

Soil 

bolt-on adaptor/cup tooth 

combo 

4 3 2 1 2 4 

Shark Chain II 4 3 2 1 1 4 

alternating side bar 4 4 4 4 4 1 

Soil 

sandy soil 

soft soil 

medium soil 

hard soil 

rocky soil 

sticky soil 

Description 

sugar sand, blow sand, or other soils where sand is the predominant component 

sandy loam 

loams, loamy clays 

packed clays, gumbo, all compacted soils 

chunk rock, glacial till, cobble, rip rap, gravel 

gumbo, sticky clays


Optional Equipment 


Optional Equipment 

See your Ditch Witch dealer for more information about the following optional equipment. 

RT120Q Tractor 

Equipment 

backup alarm 

light kit 

Description 

alarm sounds when tractor is in reverse 

mounts to ROPS and includes work lights and hazard light 

H910/H911 Trencher 

Equipment 

booms 

hydraulic trench cleaner 

long auger extensions 

Description 

several boom length options are available 

removes spoils from the trench floor 

for conditions that require spoils to be moved farther from the trench 

H1032 Plow 

Equipment 

blades 

toes 

bullets 

RC120Q reel carrier 

Description 

several blade options are available 

stabilize the plow for more constant depth 

allow a larger cavity for the material being installed 

designed to fit your Ditch Witch equipment and speed cable installation 

H1140 Saw 

Equipment 

cutting bit types 

Description 

rotating, self-sharpening conical bit with spring retainer, or carbide cap or 

carbide insert available. 

A920 Backhoe 

Equipment 

bucket width 

Description 

12-24” (305-610 mm) buckets available

RT120Q Operator’s Manual Complete the Job - 143 


Restore Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 

• Backfilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 

Rinse Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 144 

Stow Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 

Complete the Job 

CMW

Complete the Job - 144 

Restore Jobsite 


Restore Jobsite 

After product is installed, return spoils to the 

trench with optional backfill blade. 

Backfilling 

1. Position unit at end of trench, several feet 

from spoils. Aim tractor at outer edge of 

spoils. 

2. Adjust backfill blade to fit land contour. 

3. Move outer edge of spoils toward trench. 

Take two or more passes at spoils rather 

than moving all spoils at once. 

4. Repeat on other side of trench, if necessary. 

5. Engage float and make final pass over 

trench. 

Rinse Equipment 

Spray water onto equipment to remove dirt and mud. 

NOTICE: Do not spray water onto operator’s console. Electrical components could be damaged. Wipe 

down instead. 

Stow Tools 

Make sure all tools and accessories are loaded and properly secured on trailer. 

CMW

RT120Q Operator’s Manual Service - 145 


Service Precautions . . . . . . . . . . . . . . . . . . . . . . . 146 

Lubrication Overview . . . . . . . . . . . . . . . . . . . . . . 147 

Tier 4i Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 

Recommended Lubricants/Service Key . . . . . . 149 

• Approved Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 

• Approved Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 

• Engine Oil Temperature Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 

10 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 

50 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 

100 Hour. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 

250 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 

500 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 

1000 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 

2000 Hour. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 

As Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 

Service

Service - 146 

Service Precautions 


Service Precautions 




• Perform all service with the engine off unless otherwise instructed. 

• Refer to engine manufacturer’s manual for engine maintenance instructions. 

• Lower unstowed attachments to ground, before servicing equipment, 

Welding 

NOTICE: Welding can damage electronics. 

• Disconnect battery at battery disconnect switch, if equipped, or disconnect battery cables before 

welding to prevent damage to battery. Do not turn off battery disconnect switch with engine running 

or alternator and other electronic devices may be damaged. 

• Connect welder ground clamp close to welding point and make sure no electronic components are in 

the ground path. 

• Always disconnect the ECU ground connection from the frame, harness connections to the ECU, 

and other electronic components prior to welding on machine or attachments. 

Cleaning 

NOTICE: When cleaning equipment, do not spray electrical components with water. 

Changing Attachments 

The RT120Q T4i is programmed to operate with the original attachment configuration. If you change 

attachments, contact your Ditch Witch dealer to make sure the electronic programming is updated. If you 

change attachments without updating the electronic programming, your attachment may not function 

correctly.


Lubrication Overview 

Lubrication Overview 

1000 h 

500 h 

250 h 

100 h 

50 h 

10 h 

t37om041w.eps

Service - 148 

Tier 4i Engine 


Tier 4i Engine 

The Deutz Tier 4i TCD 3.6 L4 engine uses a computer-controlled fuel management system, turbocharger 

with charge air cooling, and exhaust after treatment system (EAT). The engine and the corresponding EAT 

system are adapted to each other and linked by an appropriate electronic controller. 

The diesel oxidation catalytic converter behind the cylinder head at the rear of the engine is a very 

recognizable feature. A crankcase breather is located on top of the left side of engine. 

Diagnostic and maintenance work may only be carried out by authorized personnel using equipment 

approved by Deutz. 

Deutz control units are equipped with self-diagnostics. Active and passive error codes are saved in the 

error memory. Active errors are displayed on the electronic display panel or error lamp (flash code) CAN 

bus. If error codes are recorded, call Product Support. 

NOTICE: Diesel engines that are equipped with an exhaust after treatment system (EAT) may only be 

operated with an ultra low sulfur diesel fuel. See “Approved Fuel” on page 151.


Recommended Lubricants/Service Key 


Item 

Description 

Tier 4i 

DEO 

Diesel engine oil meeting or exceeding Deutz specification DQC III- LA. 

NOTICE: Shipped from factory with API CJ-4 DEO meeting Deutz specification DQC II- 

LA. Change oil initially at 250 hours. 

• Engine must use low sulfated ash, phosphorous, and sulfur (low SAPS) oil. 

• See viscosity chart. 

• If oils meeting only API CJ-4 or ACEA E6/E9 are used, service interval is reduced 

to 250 hours. 

Tier 3 

DEO 

MPG 

EPG 

Diesel engine oil meeting or exceeding Deutz specification DQC III. 

NOTICE: Shipped from factory with API CJ-4 DEO meeting Deutz specification DQC II- 

LA. Change oil initially at 100 hours if fuel sulphur content exceeds 500 ppm (500 mg/ 

kg). Otherwise, initial oil change should be at 250 hours. 

• See viscosity chart. 

• If oils meeting only API CJ-4 or ACEA E7 are used, service interval is reduced to 

250 hours. 

Multipurpose grease. Use polyurea based NLGI GC-LB Grade 1.5 or lithium based NLGI 

GC-LB Grade 2. 

Extreme pressure grease. Use polyurea based NLGI GC-LB Grade 1.5 or lithium based 

NLGI GC-LB Grade 2, with extreme pressure additives. 

MPL Multipurpose gear oil meeting API service classification GL-5 (SAE 80W90) 

THF 

Tractor hydraulic fluid, similar to Phillips 66 HG, Mobilfluid 423, Chevron Tractor 

Hydraulic Fluid, Texaco TDH Oil, or equivalent 

DEAC Low silicate, fully formulated diesel engine antifreeze/coolant meeting ASTM D6210. 

Check level of fluid or lubricant 

Check condition 

Filter 

Change, replace. 

Adjust, service, or test

Service - 150 



Proper lubrication and maintenance protects Ditch Witch equipment from damage and failure. Service 

intervals listed are for minimum requirements. In extreme conditions, service machine more frequently. 

Use only recommended lubricants. Fill to capacities listed in “Fluid Capacities” on page 190. 

For more information on engine lubrication and maintenance, see your Deutz engine manual. 

NOTICE: 

• Use only genuine Ditch Witch parts, filters, approved lubricants, TJC, and approved coolants to 

maintain warranty. 

• Use the “Service Record” on page 209 to record all required service to your machine.



Approved Fuel 

Tier 4i Engine (U.S., Canada, EU, and Japan) 

Avoid static electricity when fueling. Ultra Low Sulfur Diesel (ULSD) 

poses a greater static ignition hazard than earlier diesel formulations. Avoid death or 

serious injury from fire or explosion. Consult with your fuel system supplier to ensure the 

delivery system is in compliance with fueling standards for proper grounding and bonding 

practices. 

This engine is designed to run on diesel fuel. Use only high quality fuel meeting ASTM D975 No. 2D, 

EN590, or equivalent. At temperatures below 32°F (0°C) winter fuel blends are acceptable. See the engine 

operation manual for more information. 

NOTICE: Use only Ultra Low Sulfur Diesel (less than 15 ppm (15 mg/kg) sulfur content) in this unit. 

Operating with higher sulfur content will damage the engine and aftertreatment device. 

Biodiesel blends up to 5% (B5) are approved for use in this unit. The fuel used must meet the 

specifications for diesel fuel shown above. In certain markets, higher blends may be used if certain steps 

are taken. Extra attention is needed when using biodiesel, especially when operating in cold weather or 

storing fuel. Contact your Ditch Witch dealer or the engine manufacturer for more information. 

Tier 3 Engine (Rest of World) 

This engine is designed to run on diesel fuel. Use only high quality fuel meeting ASTM D975 No. 2D, 

EN590, or equivalent. At temperatures below 32°F (0°C) winter fuel blends are acceptable. See the engine 

operation manual for more information. 

IMPORTANT: Worldwide, fuel sulfur regulations vary widely. Fuel used should always comply with local 

regulations. Prior to shipping, Tier 3 units were filled with API CJ-4 DEO. If operating fuel with sulfur 

content above 500 ppm (500 mg/kg), change oil initially at 100 hours. 

Biodiesel blends up to 5% (B5) are approved for use in this unit. The fuel used must meet the 

specifications for diesel fuel shown above. In certain markets, higher blends may be used if certain steps 

are taken. Extra attention is needed when using biodiesel, especially when operating in cold weather or 

storing fuel. Contact your Ditch Witch dealer or the engine manufacturer for more information.

Service - 152 

Approved Coolant 



This unit was filled with John Deere Cool-Gard II coolant before shipment from factory. Add only John 

Deere Cool-Gard II (p/n 255-006) or any fully formulated, ethylene glycol based, low-silicate, heavy-duty 

diesel engine coolant meeting ASTM specification D6210. 

NOTICE: 

• Use only pre-diluted coolant or concentrated coolant mixed with distilled water. Do not use tap 

water. 

• Do not use water or high-silicate automotive-type coolant. This will lead to engine damage or 

premature engine failure. 

• Do not mix heavy-duty diesel engine coolant and automotive-type coolant. This will lead to coolant 

breakdown and engine damage. 

Engine Oil Temperature Chart 

SAE 0W-30 

SAE 0W-40 

SAE 5W-30 

SAE 5W-40 

SAE 10W-30 

SAE 10W-40 

SAE 15W-40 

SAE 20W-50 

t37om047w.eps 

Temperature range anticipated before next oil change


10 Hour 

10 Hour 

Location Task Notes 

TRACTOR Check engine oil level DEO 

Check air filter indicator and clean dust trap 

Check hydraulic fluid level 

THF 

Check hydraulic hoses 

Check coolant level 

DEAC 

Check radiator fins 

TRENCHER Lube trencher tail roller EPG 

Lube trencher pivot 

Lube trencher auger bearings 

Lube trencher auger shaft 

EPG 

EPG 

EPG 

Check trencher auger bolts 

Check digging chain teeth and bits 

Check boom mounting bolts 

Check attachment mounting bolts 

250 ft•lb (339 N•m) 

200 ft•lb (271 N•m) 

Check restraint bar position 

Check trench cleaner position (if equipped) 

Check personnel restraint bar/trench cleaner bolts 

350 ft•lb (475 N•m) 

Check digging chain tension 

PLOW Lube plow pivots EPG 

Check plow vibrator oil level 

MPL 

Check plow arm pins and bushings 

Check plow connector pivots 

Check attachment mounting bolts 

200 ft•lb (271 N•m)

Service - 154 

Tractor 


10 Hour 

Check Engine Oil Level 

Check engine oil at dipstick (1) before operation 

and every 10 hours thereafter. Add DEO at fill (2) 

as necessary to keep oil level at highest line on 

dipstick. 

1 2 

Check Air Filter Indicator and Clean 

Dust Trap 

t37om014w.eps 

Check air filter indicator (1) and clean dust trap 

every 10 hours. Red band indicates filter must be 

changed. Push button (2) to re-set indicator. 

2 

NOTICE: Only open the air filter canister when 

air restriction is indicated. Change the elements, 

do not attempt to clean them. 

1 

• Compressed air or water may damage filter 

elements. 

• Tapping filter elements to loosen dirt may 

damage the elements. 

t37om015w.eps 

Wipe dust from trap every 10 hours. 

t37om016w.eps


10 Hour 

Check Hydraulic Fluid Level 

With frame level, check fluid at sight glass every 

10 hours. Add THF at fill as necessary. 

Clean dust from cap by blowing with low-pressure 

air. 

IMPORTANT: 

• Open cap slowly, tank may be under 

pressure. 

• Do not open unless adding hydraulic fluid. 

t37om018w.eps

Service - 156 


10 Hour 

Check Hydraulic Hoses 

away. 

Fluid or air pressure could pierce skin and cause injury or death. Stay 


• Before disconnecting a hydraulic line, turn engine off and operate all controls to relieve pressure. 

Lower, block, or support any raised component with a hoist. Cover connection with heavy cloth and 

loosen connector nut slightly to relieve residual pressure. Catch all fluid in a container. 

• Before using system, check that all connections are tight and all lines are undamaged. 

• Use a piece of cardboard or wood, rather than hands, to search for leaks. 

• Wear protective clothing, including gloves and eye protection. 

If you are injured, seek immediate medical attention from a doctor familiar with this type of injury. 

Check all hydraulic hoses every 10 hours.


10 Hour 

Check Coolant Level 

With engine cool, check coolant level in 

expansion tank sight glass every 10 hours. 

Maintain level so that coolant is visible in sight 

glass and no higher than bottom of fill neck. If 

low, add approved coolant. Do not overfill. Add 

pre-dilluted coolant to maintain proper freeze 

protection. 

IMPORTANT: See page 152 for information 

on approved coolants. 

t37om019w.eps 

Check Radiator Fins 

Check radiator for dirt, grass, and other foreign 

matter every 10 hours. Clean out with 

compressed air or spray wash if required. Be 

careful not to damage fins with high pressure air 

or water. Check more often if operating in dusty 

or grassy conditions. 

t37om020w.eps

Service - 158 

Trencher 


10 Hour 

Lube Trencher Tail Roller 

Wipe zerks clean and lube every 10 hours with 

EPG. Lube roller zerks on both sides of boom. 

Lube Trencher Pivot 

Wipe five zerks located on right of trencher pivot 

clean and lube every 10 hours with EPG. 

Wipe four zerks located on left of trencher pivot 

clean and lube every 10 hours with EPG.


10 Hour 

Lube Trencher Auger Bearings 

Lube two auger bearing zerks (one on each side) 

every 10 hours with EPG. 

Lube Trencher Auger Shaft 

Lube four auger shaft zerks (two on each side) 

every 10 hours with EPG. 

Check Trencher Auger Bolts 

Check trencher auger bolts every 10 hours. For 

optimal spoils delivery, adjust augers to match 

terrain and digging depth.

Service - 160 


10 Hour 

Check Digging Chain Teeth and Bits 

Check teeth (1) for wear every 10 hours. Replace 

worn teeth, using Ditch Witch replacement parts 

and maintaining original tooth pattern. 

For more efficient digging, contact your Ditch 

Witch dealer for information about the tooth 

pattern best suited to your jobsite. 

If using rock chain bits, check that bits rotate 

freely. Clean chain and check bits after each use. 

Replace bit when carbide cap or insert is worn or 

adapter can be damaged. 

Check chain every 10 hours. Replace worn or 

broken chains. If sidebars (2) are bent or loose 

on chain pins (3), chain spacers should be used 

to join sidebars. 

Check Boom Mounting Bolts 

Check 14 bolts (7 on each side) every 10 hours 

and tighten as necessary to keep bolts and other 

fasteners tight. Check for looseness or wear. 

Check that bolts are tightened to 250 ft•lb (28 

N•m).


10 Hour 

Check Attachment Mounting Bolts 

Check bolts every 10 hours and tighten as 

necessary to keep bolts and other fasteners tight. 

Check for looseness or wear. Apply Loctite 271 ® 

adhesive. Check that bolts are tightened to 200 

ft•lb (271 N•m). 

Check Restraint Bar Position 

Check restraint bar position every 10 hours, or 

anytime the digging chain is adjusted or 

replaced. The restraint bar is properly positioned 

when the end of bar extends between the center 

of the tail roller/sprocket and the end of the 

digging chain. Check for looseness or wear. 

Tighten bolts as necessary to keep them tight. 

Bolts mounting arm to boom should be tightened 

to 400 ft•lb (542 N•m). Apply Loctite 271 ® 

adhesive. 

t33om89w.eps 

Check Trench Cleaner Position 

Check trench cleaner position (if equipped) every 

10 hours, or anytime the digging chain is adjusted 

or replaced. The trench cleaner is properly 

positioned when there is 3-4 in (76-102 mm) 

between the digging teeth and the inside of the 

trench cleaner shoe (A). 

Check that bolts holding personnel restraint bar/ 

trench cleaner to arm are tightened to 350 ft•lb 

(475 N•m). Apply Loctite 271 ® adhesive. 

A 

t33om90w.eps

Service - 162 


10 Hour 

Check Personnel Restraint Bar/ 

Trench Cleaner Bolts 

Check all bolts that mount restraint bar/trench 

cleaner to arm every 10 hours and tighten as 

necessary to keep bolts tight. Check for 

looseness or wear. Apply Loctite 271 ® adhesive. 

Check that bolts holding personnel restraint bar/ 

trench cleaner to arm are tightened to 350 ft•lb 

(475 N•m). Bolts mounting arm to boom should 

be tightened to 400 ft•lb (542 N•m). 

Check Digging Chain Tension. 

Fluid pressure could pierce skin and cause injury or death. Stay away. 

To help avoid injury: Service digging boom grease cylinder only while standing on opposite side of 

boom. Wear gloves and safety glasses, and cover fitting with cloth when relieving pressure in cylinder. 

Check digging chain tension every 10 hours. 

With boom horizontal, measure distance from 

bottom of boom to chain. When properly 

adjusted, distance should be 4.5 - 5.5” (114 - 140 

mm). 

To tighten chain, loosen six bolts on trencher 

boom and pump EPG into cylinder. To relieve 

chain tension, loosen plug on grease cylinder.


10 Hour 

Plow 

Lube Plow Pivots 

Lube pivots every 10 hours with EPG. 

Check Plow Vibrator Oil Level 

Hot parts may 

cause burns. Do not touch until 

cool. 

Check plow vibrator oil on each side of vibrator 

every 10 hours. With vibrator horizontal, oil 

should be halfway up sight glass (2). Add MPL as 

needed at fill (1).

Service - 164 


10 Hour 

Check Plow Arm Pins and Bushings 

Check plow arm pins and bushings every 10 

hours. Tighten as needed. 

Check Plow Connector Pivots 

Visually check pivots every 10 hours for wear or 

damage. 

Check Attachment Mounting Bolts 

Check mounting bolts every 10 hours and tighten 

as necessary to keep bolts and other fasteners 

tight. Check for looseness or wear. Apply Loctite 

271 ® adhesive. Check that bolts are tightened to 

200 ft•lb (271 N•m).


50 Hour 

50 Hour 


TRACTOR 

Check drive belt 

Lube track pivot bearings 

MPG 

TRENCHER Check trencher gearbox oil level MPL 

PLOW Change plow vibrator oil (initial) MPL 

Tractor 

Check Drive Belt 

Check belt every 50 hours for damage or wear. 

Replace worn belt. To tension belt, loosen bolt (1) 

and adjust tensioner. See Deutz engine manual 

for more information. 

1 

t37om021w.eps 

Lube Track Pivot Bearings 

Lube track pivot bearings at zerk (shown) every 50 

hours. Use MPG. 

t37om022w.eps

Service - 166 

Trencher 


50 Hour 

Check Trencher Gearbox Oil Level 

Check oil at sight tube every 50 hours. Keep oil 

level at horizontal line on housing. If necessary, 

add MPL at fill plug. 

Plow 

Change Plow Vibrator Oil 

Hot parts may 


cool. 

Change plow vibrator oil after first 50 hours of 

operation. Drain oil at drain plug (2). Replace 

plug and move plow vibrator to horizontal 

position. Add MPL at fill (1) until oil is halfway up 

sight glass (2). Refill capacity is 4 qt (3.8 L).


100 HOUR 

100 HOUR 


TRACTOR Change engine oil (Tier 3) Initial; if using fuel with sulfur 

content above 500 ppm (500 

mg/kg) 

Check track tension 

Inspect track rollers and sprocket 

PLOW 

Check plow shear mounts 

Test plow connector pivots 

Tractor 

Change Engine Oil and Filter (Initial) 

Change engine oil and filter at 100 hours if fuel 

sulfur content is above 500 ppm (500 mg/kg). 

See page 149 for more information about DEO 

specifications. 

2 

To change: 

1. While oil is warm, remove drain plug (3). 

Drain oil and replace plug. 

2. Remove filter (1) and replace with new filter 

each time oil is changed. Add DEO at fill 

neck (2). 

1 

t37om039w.eps 

3

Service - 168 

Check Track Tension 

Check track tension every 100 hours. 


100 HOUR 

1 

To check: 

1. Elevate unit on jackstands, or lifting devices 

capable of holding the weight of the tractor. 

2. Measure tension using one of the methods 

below. Track is tensioned correctly when: 

• the track just comes into contact with the 

middle rollers, 

• when there is a 1/4” gap between the 

tracks and the middle rollers, 

• or when grease pressure is 1400-1600 

psi. 

To adjust: 

t37om023w.eps 

2 

1. Loosen bolts on each cylinder end (2). 

2. Pump MPG into zerk (1) until track is correctly tensioned. 

3. Tighten bolts on cylinder end (2). 

Inspect Track Rollers and Sprocket 

Inspect track rollers and sprocket for wear every 

100 hours. Replace as needed. 

t37om024w.eps


100 HOUR 

Plow 

Check Shear Mounts 

Check shear mounts for wear every 100 hours. 

Replace as needed. 

IMPORTANT: When replacing shear mounts, 

it is important to compress the shear mounts 

with the washers to prevent the shear mount 

from tearing. 

Test Plow Connector Pivots 

Test upper and lower connector pivots every 100 

hours. 

To test upper pivot: 

1. Lower plow to ground. 

2. Use plow lift control to put hydraulic load on 

pivot joints. Do not raise plow. 

3. As hydraulic load is applied and released, 

visually check joints for motion. If motion is 

observed, contact your Ditch Witch dealer. 

To test lower pivot: 

1. Lower plow to ground. 

2. Use hydraulic jack to place load on lower arm. 

3. As hydraulic load is applied and released, visually check joints for motion. If motion is observed, 

contact your Ditch Witch dealer. 

IMPORTANT: Lower plow blade to ground and visually inspect bushings and joints. Replace bushings if 

there is excessive motion.

Service - 170 

250 Hour 


250 Hour 


TRACTOR Engine oil and filter change DEO 

Lube driveshaft U-joints 

Lube axle spindle pins 

Check ground drive gearbox oil level 

Check differential oil level 

Lube planetary wheel ends 

EPG 

EPG 

MPL 

MPL 

MPL 

Tractor 

Engine Oil and Filter Change (Tier 3) 

Change engine oil and filter every 250 hours 

when using motor oils meeting only API CJ-4 or 

ACEA E7. See page 149 for more information 

about DEO specifications. 

2 

To change: 





neck (2). 

1 

t37om039w.eps 

3 

Engine Oil and Filter Change (Tier 4i) 


when using motor oils meeting only API CJ-4 or 

ACEA E6/E9. See page 149 for more information 

about DEO specifications. 

2 

To change: 





neck (2). 

1 

t37om039w.eps 

3


250 Hour 

Lube Driveshaft U-joints 

Lube driveshaft U-joints every 250 hours with 3-4 

shots of EPG. 

t37om025w.eps 

Lube Axle Spindle Pins 

Lube axle spindle pins every 250 hours with 3-4 

shots of EPG. 

Check Ground Drive Gearbox Oil 

Level 

Check oil level at fill (shown) every 250 hours. 

Keep level at raised horizontal line on gearbox. 

Add MPL as needed. 

t37om026w.eps 

t37om027w.eps

Service - 172 


250 Hour 

Check Differential Oil Level 

Check oil level at fill (shown) every 250 hours. 

Add MPL as needed. 

t37om028w.eps 

Check Planetary Wheel End Oil Level 

Remove track to check oil level in planetary 

wheel ends every 250 hours. Add MPL as 

needed. 

t37om029w.eps


500 Hour 

500 Hour 


TRACTOR Change engine oil and filter ONLY if using motor oil 

meeting Deutz specifications 

DQCIII-LA (Tier 4i) or DQCIII 

(Tier 3). 

Change fuel filters 

Change hydraulic fluid and filter 

THF 

Test coolant freeze protection level 

PLOW Change plow vibrator oil MPL 

TRENCHER 

Adjust headshaft bearings 

Tractor 

Change Engine Oil and Filter 


ONLY if using motor oil meeting Deutz 

specifications DQCIII-LA. See page 149 for more 

information about DEO specifications. 

2 

To change: 





neck (2). 

1 

t37om039w.eps 

3

Service - 174 


500 Hour 

Change Fuel Filters 

Change fuel filters (shown) every 500 hours. 

Change Hydraulic Fluid and Filter 

Change hydraulic fluid and filter every 500 hours. 

Change hydraulic fluid and filter every 250 hours 

if jobsite temperature exceeds 100°F (38°C) 

more than 50% of the time. 

t37om030w.eps 

2 

To change: 

3 

1. Remove drain plug (1). 

2. Drain fluid and replace plug. 

3. Change filter (2). 

4. Add THF at fill (3). 

t37om031w.eps 

1 

Test Coolant Freeze Protection Level 

With engine cool, test coolant freeze protection 

level using a hydrometer or refractometer. 

Recommended freeze protection level is -34°F 

(-37°C). Adjust as needed. 

If colder temperatures are expected, consult your 

Ditch witch dealer or coolant supplier. 

IMPORTANT: See page 152 for information 

on approved coolants. 

Use pre-dilluted coolant to maintain proper freeze 

protection. 

t37om019w.eps


500 Hour 

Plow 

Change Plow Vibrator Oil 

Hot parts may 


cool. 

Change plow vibrator oil every 500 hours. If 

normal operating temperature exceeds 100°F 

(38°C), change plow vibrator oil every 250 hours. 

Drain oil at drain plug (2). Replace plug and 

move plow vibrator to horizontal position. Add 

MPL at fill until oil is halfway up sight glass (1). 

Refill capacity is 4 qts (3.8 L). 

Trencher 

Adjust Headshaft Bearing 

Adjust headshaft bearing every 500 hours. 

To adjust: 

1. Remove cover. Remove bolts attaching 

trenching attachment motor to gearbox. 

2. Remove bolt and washers in left end of 

headshaft. 

3. Support gearbox with hoist and slide it off 

headshaft. 

4. Install spacer (p/n 184-044) in place of 

gearbox while checking bearings. 

5. Replace bolt on end of headshaft. 

6. Remove chain from headshaft sprocket. 

7. Turn chain sprocket until headshaft sprocket turns. When properly adjusted, it will take two hands and 

some effort. If it turns easily, remove a shim.

Service - 176 

1000 Hour 


1000 Hour 


TRACTOR Change differential oil MPL 

Change ground drive gearbox oil 

Change planetary wheel end oil 

MPL 

MPL 

TRENCHER Change trencher gearbox oil MPL 

Tractor 

Change Differential Oil 

Change differential oil every 1000 hours. 

To change: 


2. Drain fluid and replace plug. 

3. Add MPL at fill (1). 

t37om033w.eps 

Change Ground Drive Gearbox Oil 

Change ground drive gearbox oil every 1000 

hours. 

To change: 


2. Drain oil and replace plug. 

3. Fill gearbox with MPL at fill (1). 

t37om034w.eps


1000 Hour 

Change Planetary Wheel End Oil 

Change wheel end oil every 1000 hours. 

To change: 

1. Position wheel with plug at bottom. 

2. Remove plug. 

3. Drain oil. 

4. Reposition wheel with plug at midway 

position. 

5. Fill with MPL to plug opening. 

6. Replace plug. 

t37om035w.eps 

Trencher 

Change Trencher Gearbox Oil 

Change trencher gearbox oil every 1000 hours. 

Drain at plug. Replace drain plug and fill with 

MPL to lowest line on sight tube.

Service - 178 

2000 Hour 


2000 Hour 


TRACTOR Change engine coolant DEAC 

Check seatbelt and seatbelt 

mounting hardware 

Tractor 

Change Engine Coolant 

NOTICE: 

• The use of non-approved coolant may lead to engine damage or premature engine failure and will 

void engine warranty. 

• See “Approved Coolant” on page 152 for list of approved coolants. 

Drain cooling system at drain (2) every two years 

or 2000 hours. Add approved coolant at fill (1). 

1 

2 

t37om042w.eps


2000 Hour 

Inspect Seat Belt 

Check seat belt and mounting hardware as 

needed. Inspect the webbing, buckle and latch, 

retractor, and mounting hardware. 

Buckle and Latch 

2 

1 3 

1 

Check that the buckle and latch (1) are not broken 

or corroded. When inserting the latch into the 

buckle, the latch should insert smoothly until an 

audible click is heard. Latch should not release 

when the seat belt is tugged. 

Webbing 

Inspect seat belt webbing (2) to ensure that it is not cut, frayed or showing signs of extreme or unusual 

wear. Check the area near the buckle and latch and anywhere the seat belt has contact with equipment or 

seat. 

Retractor 

Check that the retractor (3) operates smoothly when the belt is pulled and released. Retractor should spool 

belt without locking. 

Mounting Hardware 

Inspect the seat belt mounting bolts (4) on both sides of the seat to ensure they are tight. Replace missing, 

damaged, or corroded bolts. 

4 

SeatBelt.eps

Service - 180 

As Needed 


As Needed 


TRACTOR 

Adjust parking brake 

Clean radiator fins 

Drain water separators and fuel filter 

As indicated on dash display 

TRENCHER 

PLOW 

Replace digging chain 

Clean feed tube 

Replace sod cutter and blade 

Check plow blade bolts 

210 ft•lb (285 N•m) 

BACKHOE 

Replace pins and bushings


As Needed 

Tractor 

Adjust Parking Brake 

Adjust parking brake as needed. 

To adjust: 


2. Remove orange sleeve. 

3. Twist lever clockwise to tighten. 

4. Engage parking brake to test tension. If 

tension is too tight, the brake lever will not 

engage fully. Repeat steps 1-3 as necessary. 

5. Replace orange sleeve. 

t37om036w.eps 

Clean Radiator Fins 

Clean out radiator fins with compressed air or 

spray wash if required. Be careful not to damage 

fins with high-pressure air or water. Check more 

often if operating in dusty or grassy conditions. 

Drain Water Separators and Fuel Filter 

t37om037w.eps 

Drain water separators and fuel filter as needed. 

WIF (water in fuel) indicator will indicate need. 

Drain at plug as needed until water is removed 

and fuel runs from drain. 

t37om017w.eps

Service - 182 

Trencher 


As Needed 

Replace Digging Chain 

Visually check digging chains for wear on teeth 

(1), rollers, and sidebars (2). Check pins (3) and 

bushing wear by measuring distance between 

chain pins and comparing it with a new chain. 

IMPORTANT: Replace sprockets when a new 

chain is installed. 

To remove chain: 


2. Start tractor. See page 76 for proper start-up 

procedures. 

3. Move attachment direction/speed control 

until digging chain connector pin is on top of boom. 

4. Lower boom to ground. 



7. Secure chain by clamping links on either side 

of connector pin with chain jaws. Squeeze 

jaws to reduce pressure on connector pin.


As Needed 

8. Loop cable through links nearest connector 

pin. 

away. 

Fluid pressure could pierce skin and cause injury or death. Stay 

To help avoid injury: Service digging boom grease cylinder only while standing on opposite 

side of boom. Wear gloves and safety glasses, and cover fitting with cloth when relieving 

pressure in cylinder. 

9. Loosen plug on grease cylinder to relieve chain tension. 

10. Stand clear of chain and remove lock key from connector pin. Drive connector pin out of link. 

Crushing weight could cause death or serious 

injury. Use proper procedures and equipment or stay away. 

11. Unclamp links. Slowly release cable and lower chain to ground. 

12. Lay chain on ground with teeth down.

Service - 184 


As Needed 

To install chain: 

1. Lay chain on ground with teeth down and pointed toward unit. 



4. Disengage parking brake and verify parking brake indicator is off. 

5. Move ground drive control to reverse. 

6. Back unit up until chain extends past head shaft about 1’ (305 mm). 

7. Move ground drive control to neutral. 

8. Lower backfill blade, if equipped, to ground. 

9. Lower boom to horizontal position. 



12. Pull rear end of chain over and about 10" (260 mm) past tail roller. 

13. Use hoist to pull front end of chain over head shaft sprocket. 

14. Move chain down boom until chain connector pin and lock key can be installed. Install connector pin 

and lock key. 

15. Tighten chain by pumping EPG into grease cylinder. 

Time Augers 

Ensure that augers are balanced, as shown. If 

auger timing is off, unit will bounce from side to 

side even in normal digging conditions. 

To adjust timing: 

1. Remove bolts holding augers to auger shaft 

and rotate either auger as needed until 

augers are balanced. 

2. Reinstall bolts and tighten securely.


As Needed 

Plow 

Clean Feed Tube 

Clean feed tube as needed. 

Replace Sod Cutter and Blade 

Replace worn sod cutter and plow blade as 

needed.

Service - 186 


As Needed 

Check Plow Blade Bolts 

Check plow blade bolts as needed. If loose, use 

Loctite® 242 (blue) and tighten bolts to 210 ft•lb 

(285 N•m). 

Backhoe 

Replace Pins and Bushings 

Replace pins (1) and bushings (2) when worn or 

damaged.

RT120Q Operator’s Manual Specifications - 187 


Specifications 


L2 

W2 

L1 

H1 

A2 

L4 

W4 

t37om038w.eps 

Dimensions U.S. Metric 

A2 Angle of approach 34° 34° 

H1 Height 117 in 2.97 m 

L1 Nose to rear mount length 125 in 3.18 m 

L2 Length - transport 166 in 4.22 m 

L4 Wheelbase 79 in 2.01 m 

W2 Width 89 in 2.26 m 

W4 Tread 71 in 1.80 m 

General 

Ditch Witch model RT120Q tractor, 4-wheel drive, rigid frame, hydrostatic ground drive through rubber 

tracks, 4-wheel steering, hydrostatic attachment drive, riding unit.

Specifications - 188 



Operation U.S. Metric 

Forward speeds 

Low 2.0 mph 3.2 km/h 

Medium 4.4 mph 7.1 km/h 

High 7.2 mph 11.6 km/h 

Reverse speeds 

Low 2.0 mph 3.2 km/h 

Medium 4.4 mph 7.1 km/h 

High 4.7 mph 7.5 km/h 

Vehicle clearance circle (SAE) wall to wall with optional backfill blade 

Front steer only 39.5 ft 12 m 

Coordinated steer 27 ft 8.2 m 

Ground clearance 15.5 in 394 mm 

Basic unit weight 13,600 lb 6169 kg 

Maximum allowable tractor weight 26,200 lb 11,884 kg 

Front counterweight 1300 lb 590 kg 

Side counterweight (each) 250 lb 114 kg 

Backfill Blade (optional) U.S. Metric 

Blade width 80 in 2.03 m 

Blade height 17 in 430 mm 

Lift height above ground 26 in 660 mm 

Blade drop below ground 10 in 254 mm 

Maximum swing angle (left/right) 30° 30° 

Tilt angle (up/down) 24° 24°



Power Plant U.S. Metric 

Engine: Deutz Tier 3 or Tier 4i TCD 3.6 L4 diesel, liquid cooled, 4 cyl, common rail direct injection, 

turbocharged with charge air cooling, and Tier 4i with exhaust after treatment system (EAT). 

Displacement 221 in 3 3.6 L 

Bore 3.86 in 98 mm 

Stroke 4.72 in 120 mm 

Engine manufacturer’s gross power rating per SAE J1349 121 hp 90 kW 

Estimated net power per SAE J1349 113 hp 84 kW 

Rated speed 2300 rpm 2300 rpm 

Maximum engine tilt angles* 

Longitudinal 30° 30° 

Lateral 30° 30° 

*Exceeding these operating angles will cause engine damage. This DOES NOT IMPLY machine is 

stable to maximum angle of safe engine operation. 

Power Train 

Ground drive: hydrostatic 

Differentials: planetary front and rear with rear steering 

Service brake: hydrostatic 

Parking brake: disc, hand operated 

Tracks: 450x86x42 rubber track, chevron pattern 

Attachment drive: hydrostatic, electronically-operated speed infinitely variable from zero to maximum 

Hydraulic System U.S. Metric 

Ground drive pump capacity at 2300 rpm 47.4 gpm 179 L/min 

Ground drive pump relief pressure at 2300 rpm 6200 psi 427.5 bar 

Attachment pump capacity at 2300 rpm 47.4 gpm 179 L/min 

Attachment pump relief pressure at 2300 rpm 6200 psi 427.5 bar 

Auxiliary pump capacity at 2300 rpm 13.8 gpm 52 L/min 

Auxiliary pump relief pressure at 2300 rpm 3300 psi 227.5 bar




Fluid Capacities U.S. Metric 

Fuel tank 38 gal 144 L 

Engine oil 8.4 qt 8 L 

Hydraulic reservoir 20 gal 76 L 

Hydraulic system 25 gal 95 L 

Cooling system 12.3 qt 11.6 L 

Battery (2 used) 

Group 65, SAE res. cap 165 min., SAE cold crank @ 0° F (-18° C), 875 amp 

Auxiliary power outlet - 12 volt, 10 amp 

Vibration Level 

Average vibration transmitted to the operator’s hand and whole body while plowing is 8.12 and 1.44 m/ 

sec 2 respectively. 

Operator seat complies with ISO 7096. 

Noise Levels 

Operator ear sound pressure level is 92 dBa per ISO 6394. 

Exterior sound power level is 109 dBa per ISO 6393. 

Unless otherwise specified, all figures are for standard equipment only. 

Specifications are called out according to SAE recommended procedures. Specifications are general and subject to change without 

notice. If exact measurements are required, equipment should be weighed and measured. Due to selected options, delivered 

equipment may not necessarily match that described.


H910 Trencher 

H910 Trencher 


A 3 Angle of departure 30° 30° 

A Trench depth, maximum 93 in 2.36 m 

B Trench width, maximum 24 in 610 mm 

C Boom travel down 65° 65° 

C 1 Boom travel up 50° 50° 

E 1 Centerline of trench to outside edge, left 45.5 in 1.12 m 

E 2 Centerline of trench to outside edge, right 36.5 in 927 mm 

F Headshaft height, digging chain 36 in 914 mm 

H 1 Transport height 128 in 3.25 m 

L 2 Transport length 120 in 3.05 m 

L Headshaft overhang 48.5 in 1.2 m 

N Soil discharge reach 33 in 843 mm 

Attachment weight 1750 lb 794 kg



H910 Trencher 


Headshaft speeds with RT120Q at 2300 engine rpm 

Ratio low 152 rpm 152 rpm 

Ratio standard 203 rpm 203 rpm 

Ratio high (not recommended) 247 rpm 247 rpm 

Digging chain speeds with RT120Q 

Ratio low 428 ft/min 130 m/min 

Ratio standard 572 ft/min 174 m/min 

Ratio high (not recommended) 694 ft/min 212 m/min


H911 Trencher 

H911 Trencher 


A3 Angle of departure 27° 27° 


B Trench width, maximum 24 in 610 mm 


C1 Boom travel up 50° 50° 

E1 Centerline of trench to outside edge, left 30.5 in 775 mm 

E2 Centerline of trench to outside edge, right 19 in 483 mm 


H1 Transport height 130 in 3.30 m 

L2 Transport length 134.5 in 3.42 m 

L Headshaft overhang 62.5 in 1.59 m 

N Soil discharge reach 33 in 838 mm 




H911 Trencher 


Headshaft speeds with RT120Q at 2300 engine rpm 




Digging chain speeds with RT120Q 



Ratio high (not recommended) 694 ft/min 212 m/min


H1032 Plow 

H1032 Plow 


A Cover depth* 36 in 915 mm 

A’ Penetration* 40 in 1.02 m 

A3’ Angle of departure, transport, no blade 47.5° 47.5° 

A3 Angle of departure, transport, 24” (610-mm) blade 30° 30° 

Angle of departure, transport, 30” (760-mm) blade 24° 24° 

H Angle of depression, plow max. 25° 25° 

H2 Height transport 93 in 2.36 m 

J Blade ground clearance, 30” (760-mm) blade 24 in 610 mm 

L2 Attachment length, fully lowered, no blade 97 in 2.46 m 

L2’ Attachment length, fully raised, no blade 78 in 1.98 m 

Plow swing angle 43° 43° 

Inclusive blade steer angle 89° 89° 

Center of plow to outside edge of machine, left 43.5 in 1.11 m



H1032 Plow 

Center of plow to outside edge of machine, right 45.5 in 1.16 m 

*Suggested maximum. Plow blade used will be determined by job requirements and soil conditions 


Plow vibrator force @ 1800 rpm 35,215 lb 157 kN 

Maximum material diameter 

Pulled 3 in 80 mm 

Fed 2 in 50 mm 

General U.S. Metric 

Attachment weight, without plow blade 2600 lb 1180 kg 

Counterweight required. Contact your local Ditch Witch dealer for counterweight requirements.


H1052 Combo 

H1052 Combo 

Trencher 




B Trench width 6-12 in 150-300 mm 

C1 Boom travel up 44° 44° 



L 2 Transport length (48” boom) 111 in 2.19 m 

D Transport height (48” boom) 96 in 2.44 m 

E1 Center of trench to outside edge, left* 13 in 330 mm 

E2 Center of trench to outside edge, right 76 in 1.93 m 

N Spoil discharge reach, minimum 19 in 480 mm



H1052 Combo 

L Headshaft overhang 48 in 1.22 m 

*Left edge of machine is defined as outside of digging chain guard 


Maximum headshaft speed at 2300 engine rpm 




Maximum digging chain speed 



Ratio high 1059 ft/min 323 m/min


H1052 Combo 

Plow 


A Cover depth* 36 in 915 mm 

A’ Penetration* 40 in 1.02 m 

A3 Angle of departure, transport, 24” (610-mm) blade 30° 30° 

Angle of departure, transport, 30” (760-mm) blade 24° 24° 

A3’ Angle of departure, transport, no blade 47.5° 47.5° 

H Angle of depression, plow max. 25° 25° 

H2 Height, transport 93 in 2.36 m 

J Blade ground clearance, 30” (760-mm) blade 24 in 610 mm 

L2 Attachment length, fully lowered, no blade 97 in 2.46 m 

L2’ Attachment length, fully raised, no blade 78 in 1.98 m 

Plow swing angle, left 0° 0° 

Plow swing angle, right 43° 43° 

Inclusive blade steer angle 89° 89° 

Center of plow to outside edge of machine, left 41 in 1.04 m



H1052 Combo 

Center of plow to outside edge of machine, right 48 in 1.22 mm 

* Suggested maximum. Plow blade used will be determined by job requirements and soil conditions. 

Operational U.S. Metric 

Plow vibrator force @ 1800 rpm 35,215 lb 156 644 kN 

Maximum material diameter 

Pulled 3 in 76 mm 

Fed 2 in 51 mm 


Attachment weight without boom, chain, or plow blade 3465 lb 1567 kg 

Counterweight required. Contact your local Ditch Witch dealer for counterweight requirements.


A920 Backhoe 

A920 Backhoe 


A Transport height 122 in 3.10 m 

C Ground clearance 33 in 838 mm 

D Backhoe length, stowed 117 in 2.97 m 

F Digging depth, max. 108 in 2.74 m 

G Digging depth, 2” (0.6 m) flat bottom 105 in 2.67 m 

J Operating height, fully raised 160 in 4.06 m 

K Loading height 108 in 2.74 m 

L Loading reach 78 in 1.98 m 

M Reach from swing pivot 158 in 4.01 m 

N Swing pivot to centerline axle 57 in 1.45 m 

P Bucket rotation 170° 170° 

B Stabilizer spread, transport 86 in 2.18 m



A920 Backhoe 

E Backhoe or basic unit width 82 in 2.08 m 

R Stabilizer spread, operating 121 in 3.07 m 

U Leveling angle 10° 10° 


Bucket 

Width 12-24 in 305-610 

mm 

Capacity 1.7-3.5 ft 3 0.05-.1 m 3 

Backhoe weight with 18” (686 mm) bucket 3300 lb 1497 kg 

Lift capacity, boom over end and swing arc, SAE* 

@ 48” (1.2 m) 1170 lb 530 kg 

@ ground level 1250 lb 567 kg 

@ 72” (1.8 m) 1184 lb 537 kg 

Lift capacity, dipperstick over end and swing arc, SAE* 

@ 52” (1.3 m) 3184 lb 1444 kg 

@ 96” (2.4 m) 2242 lb 1017 kg 

Swing arc 180° 180° 

Digging force 

Using bucket cylinder 6600 lb 2994 kg 

Using dipperstick cylinder 4475 lb 2030 kg 

*Lift capacities are for a stationary machine supported by stabilizers.


RC120 Reel Carrier 

RC120 Reel Carrier 

N 

L5 

t37om040w.eps 


L5 Distance from backfill blade to outside edge of reel carrier with 74 in 1.88 m 

maximum diameter reel 

N Maximum reel diameter 84 in 2.13 m 

Internal width 54 in 1.37 m 

Capacity 2500 lb 1134 kg 

Attachment weight with six 90-lb (41-kg) counterweights 1600 lb 726 kg


H1140 Saw 


H1140 Saw 

L2 

D 

J 

A 

A3 

t37om049w.eps 


A Trench depth 40.5 in 1.03 m 

Trench width 4.5, 6, 8 in 115,150, 

203 mm 

D Transport height - attachment 130 in 3.3.m 

Height - wheel on ground 102 in 2.6 m 

L2’ Overall length - wheel on ground 122.5 in 3.1 m 

J Ground clearance at wheel 27 in 700 mm 



RT120Q Operator’s Manual Support - 205 

Procedure 

Support 

Procedure 

Notify your dealer immediately of any malfunction or failure of Ditch Witch ® equipment. 

Always give model, serial number, and approximate date of your equipment purchase. This information 

should be recorded and placed on file by the owner at the time of purchase. 

Return damaged parts to dealer for inspection and warranty consideration if in warranty time frame. 

Order genuine Ditch Witch replacement or repair parts from your authorized Ditch Witch dealer. Use of 

another manufacturer's parts may void warranty consideration. 

Resources 

Publications 

Contact your Ditch Witch dealer for publications and videos covering safety, operation, service, and repair 

of your equipment. 

Ditch Witch Training 

For information about on-site, individualized training, contact your Ditch Witch dealer. 

CMW ®

Warranty - 206 


Warranty 

Ditch Witch ® Equipment and Replacement Parts 

Limited Warranty Policy 

Subject to the limitation and exclusions herein, free replacement parts will be provided at any authorized Ditch Witch dealership for 

any Ditch Witch equipment or parts manufactured by The Charles Machine Works, Inc. (CMW) that fail due to a defect in material or 

workmanship within one (1) year of first commercial use. Free labor will be provided at any authorized Ditch Witch dealership for 

installation of parts under this warranty during the first year following “initial commercial” use of the serial-numbered Ditch Witch 

equipment on which it is installed. The customer is responsible for transporting their equipment to an authorized Ditch Witch 

dealership for all warranty work. 

Exclusions from Product Warranty 

• All incidental or consequential damages. 

• All defects, damages, or injuries caused by misuse, abuse, improper installation, alteration, neglect, or uses other than those for 

which products were intended. 

• All defects, damages, or injuries caused by improper training, operation, or servicing of products in a manner inconsistent with 

manufacturer’s recommendations. 

• All engines and engine accessories (these are covered by original manufacturer’s warranty). 

• Tires, belts, and other parts which may be subject to another manufacturer’s warranty (such warranty will be available to 

purchaser). 

• ALL IMPLIED WARRANTIES NOT EXPRESSLY STATED HEREIN, INCLUDING ANY WARRANTY OF FITNESS FOR A 

PARTICULAR PURPOSE AND MERCHANTABILITY. 

IF THE PRODUCTS ARE PURCHASED FOR COMMERCIAL PURPOSES, AS DEFINED BY THE UNIFORM COMMERCIAL 

CODE, THEN THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE FACE HEREOF AND THERE ARE NO IMPLIED 

WARRANTIES OF ANY KIND WHICH EXTEND TO A COMMERCIAL BUYER. ALL OTHER PROVISIONS OF THIS LIMITED 

WARRANTY APPLY INCLUDING THE DUTIES IMPOSED. 

Ditch Witch products have been tested to deliver acceptable performance in most conditions. This does not imply they will deliver 

acceptable performance in all conditions. Therefore, to assure suitability, products should be operated under anticipated working 

conditions prior to purchase. 

Defects will be determined by an inspection within thirty (30) days of the date of failure of the product or part by CMW or its authorized 

dealer. CMW will provide the location of its inspection facilities or its nearest authorized dealer upon inquiry. CMW reserves the right 

to supply remanufactured replacements parts under this warranty as it deems appropriate. 

Extended warranties are available upon request from your local Ditch Witch dealer or CMW. 

Some states do not allow exclusion or limitation of incidental or consequential damages, so above limitation of exclusion may not 

apply. Further, some states do not allow exclusion of or limitation of how long an implied warranty lasts, so the above limitation may 

not apply. This limited warranty gives product owner specific legal rights and the product owner may also have other rights which vary 

from state to state. 

For information regarding this limited warranty, contact CMW’s Product Support department, P.O. Box 66, Perry, OK 73077-0066, or 

contact your local Ditch Witch dealer. 

First version: 1/91; Latest version: 11/11 

CMW ®

RT120Q Operator’s Manual Service Record - 209 

Service Record 

Service Performed Date Hours 

CMW ®

Service Record - 210 


Service Performed Date Hours 

CMW ®

RT120Q Operator's Manual - Ditch Witch

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