MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
starting a separate thread as i had asked about dual pos coil problems, but turns out problem's on the damper side.
it's a sektor converted to dual pos coil. srandard MoCo compression damper, and a rebound damper for a coil fork, single flow, not dual.
so some kind of hydro-lock, meaning the fork won't compress more than 50mm of it's ~145mm.
I've had lowers off and pushed on the rebound damper foot and it stopped short.
but how do i isolate whether is the compression or rebound damper that’s at fault?
they would both appear to let oil through in the compression direction (when i blow through them).
i have spare rebound dampers so i guess i could try bunging one of them in.
on compression, does the rebound damper both move through the oil, and push some of the oil up into the compression damper, at a controlled rate?
It could be as simple as too much oil in the damper; just unthread the MoCo cartridge, check the oil level and adjust as necessary.
Of course, if the extra oil was ingested from the lowers then it could be that the shaft seal needs replacing.
yep makes sense, but lowers seemed to have the right amount of oil come out when i pulled them off. ~ 6ml each side
but that's the only thing that makes sense so far.
i guess i just do all the seals and pop it back together
It the shaft seal was knackered, all the damping oil would be in the lowers and it would be obvious when that were taken off. It's either overfilled or something is stuck or slipped. Perhaps the compression lock no longer operates at the adjuster and it's stuck closed.
The first generation of the Charger dampers were blowing bladders due to overfilling via a defective lower sealhead, I figured the same could be happening here....
There's not much going on on a MotionControl compression assembly, it will either let oil through or it won't. The overfilling is easy to diagnose by just removing the MoCo unit and cycling the rebound shaft.
The correct oil level will have the bottom of the fully threaded MoCo unit barely touching the oil surface at full shaft extension. One could measure the distance between the lip at the top of the unit and the o-ring at the bottom, then use a depth gauge to match this when filling up the damper.
it's not overfilled, i did it correctly myself and checked as otsdr described, and have been using for a good few months since, before the problem started.
the compression lock and adjuster appear to be working fine, but soething may have been stuck and just come loose when i emptied the oil out. seems unlikely tho that somehting could block the port but that it would still open and close normally
i guess i'll give it all a good clean, bung it back together and swap out the rebound damper for another i have.
yes would have been good to pull the comp dapmer first as you say otdsr, and cycle the rebound befoer emptying oil. that would have given a good indication