job just purchased a old A187 s40xl hyster forklift at auction for a few hundred bucks. I was sent out to test it out and inspect it before he bid on it. everything seemed to work fine there at the auction yard, however once it got delivered to our shop now it is stuck in reverse. so far I have tried swapping the solenoids to see if one is faulty. no change. I have swapped the forward and reverse valves. no change. ive replaced the o rings on the valves. no change.replaced trans filter.no change. ive even ran it with the solenoids removed and still stuck in reverse.
if I press the forward button on the pedal it will make it stop reversing as long as I'm holding the button down.
I'm assuming this means there's an issue in the reverse drum/clutches causing them to have pressure applied ? I'm not ver versed on equipment as I was originally hired to maintain the companies fleet of vehicles but I find myself working more and more on lifts and hydraulics lately and been pretty much just figuring it out as I go.
any help or a point in the right direction would be greatly appreciated.
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This is a common fault on earlier hysters I've seen it many times.
It sounds like somebody has put the wrong oil in the transmission it does not run on atf.
The lining will have dried out and fallen off the clutch plates jamming up the clutch pack so it is always engaged, unfortunately the only fix is a transmission strip and new clutch plates in both packs. Not a hard job or mega expensive but time consuming
Anthony,
Since you can press the forward pedal switch and lift stops going in reverse, I would inspect all wiring and switches related to the travel pedal. Swap forward switch with reverse and see it changes the constant travel to forward. If so replace switch, if not make sure all wiring is good. Possible failed trans. Good Luck.
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