Not all 100 series suspension are configured, as the one in your driveway
I work on many different 100 series configuration. Most of the coils I replace, are on AHC system. Wherein when I replace with the longer Toyota AHC coils. I like to add 30MM spacers to each side (@PADDO first suggested this to me). Which is very nice combo to enhance ride and extend life of globes.
Toyota AHC coils w/30mm spacer are ~4" longer, than old stock LX.
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When dealing with AHC suspension, installing new OEM Land Cruiser coils and 30mm spacer. Either I use the spring compressor on DS or I "must" release not only drop down flexible brake line (unless longer SS flexables installed), but also the AHC height sensor adjuster arm. Which I prefer not to release either, as sometimes leads to a can of worms, eating up my time.
Personally I find it easier to use spring compressor, when I hit limit on AHC sensor arm and brake line. This only happens on driver side. In any case I never stretch either, especially the flexible brake lines, or it may rupture internally.
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Some fear the spring compressors, fearing they'll release and take their head off. Have no fear, when properly attached! Strut spring compressor (which is only type I have in my tool box) have locks. They do take setting up in just the right spot, to fit up in vehicle once on coil for install. Which for me is easy, as I've done dozens.
For most none AHC configurations, spring compressor is not needed. But when needed they're a time saver IMHO.
Tip:
I use a bottle jack to press down rear end, after releasing shock from lower end along cushion/collar from stabilizer bar, while jack/stand braces up diff/axle on opposite side to pivite off of..
Bottle jack, allows me to keep both hand free for R&R of coil, while closely watching brake line(s) and AHC adjustor for limits.
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No pics of the compressor you use in action?
I have the same setup. 2006 LC with AHC, 30mm rear spacers. No spring compressor needed to install. One banana job. My sensor arm isn't that stretched, I only unbolt the brake line mount on the frame above along with the sway links and shocks. Jack up the opposing side and push down with a little force on the droop side and the spring jumps out. Installing with the 30mm spacer takes a little more of a push down on the axle but it isn't nearly anything forceful.
Can't imagine that scenario is all that different between LCs.
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