Rancho "remote" adjust debug
My "new to me" F-350 Dually came to me with 4 Rancho 9000 shocks and an odd "remote" setup for controlling them. I say odd, because it was some aftermarket (non-Rancho) digital controller plus a Fi...
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When I solve something like this, I always try to come back to the thread and document my solution in case somebody else stumbles upon the thread.
This turned out to be fairly simple. It turns out the shocks are adjustable via a small internal "piston". This piston is spring loaded, and is pushed in to increase the "stiffness" of the shock. With regular knob adjustment, the knob has a coarsely threaded "screw" attached to the knob. As it is turned clockwise toward 9, the screw pushes further against this small adjustment piston and stiffens the shock. For remote, the air pressure from the control line pushes in on that same piston. The more pressure in the line, the further in it pushes that piston, via air pressure.
I decided to just make my own adjustment screw assembly. I took a thin piece of metal (cut from a nailing strip using a pair of tin-snips ). I drilled three holes, with the outer ones being exactly 1 inch apart (same as the mounting holes on the shock). I used a tap to thread the middle hole for an "adjustment screw".
Seems to work great. Took me an hour or so to do all 4 of them.
This turned out to be fairly simple. It turns out the shocks are adjustable via a small internal "piston". This piston is spring loaded, and is pushed in to increase the "stiffness" of the shock. With regular knob adjustment, the knob has a coarsely threaded "screw" attached to the knob. As it is turned clockwise toward 9, the screw pushes further against this small adjustment piston and stiffens the shock. For remote, the air pressure from the control line pushes in on that same piston. The more pressure in the line, the further in it pushes that piston, via air pressure.
I decided to just make my own adjustment screw assembly. I took a thin piece of metal (cut from a nailing strip using a pair of tin-snips ). I drilled three holes, with the outer ones being exactly 1 inch apart (same as the mounting holes on the shock). I used a tap to thread the middle hole for an "adjustment screw".
Seems to work great. Took me an hour or so to do all 4 of them.
