Greg Wolodkin
Member
Well sort of, anyway. Couldn't remove the lift cover as the arms were stuck in the up position. Removed the inspection plate and could see that the piston was in place and the dog bone was where it should be. Moving the lift arms the small amount that they'd move, I could see the dog bone move but it would stop when it hit the piston. Jumped to the conclusion that the piston was seized up due to moisture and time.. hit it with PB Blaster and came inside to read old ytmag posts looking for advice.
Though I didn't believe it until I saw it with my own eyes, it was a hydraulic problem and the unload valve was stuck. Put a rag over the port on the cover plate and backed the bolt out while holding the arms up. With the bolt removed, the arms dropped like nobody's business, sending oil all over the top of the lift cover I had so carefully cleaned up already. Still need to rebuild the cover and clean up the unload valve but I've done that before.. should be no problem.
Judging by the thick layer of grease around the brake cross shaft, I think I'll go ahead and change those seals while I'm here. That's how I got my 4000su to stop marking its territory.
It looks like the axle trumpets may be leaking as well.. no active leaks, just layers of grease there that make me think it will leak more after I clean it up. Is it pretty easy to get in there and renew seals and gaskets? Anything else worth doing if I go that far? (Note too in the third picture there's a half-baked attempt to safety wire two of the bolts on the trumpet)
Though I didn't believe it until I saw it with my own eyes, it was a hydraulic problem and the unload valve was stuck. Put a rag over the port on the cover plate and backed the bolt out while holding the arms up. With the bolt removed, the arms dropped like nobody's business, sending oil all over the top of the lift cover I had so carefully cleaned up already. Still need to rebuild the cover and clean up the unload valve but I've done that before.. should be no problem.
Judging by the thick layer of grease around the brake cross shaft, I think I'll go ahead and change those seals while I'm here. That's how I got my 4000su to stop marking its territory.
It looks like the axle trumpets may be leaking as well.. no active leaks, just layers of grease there that make me think it will leak more after I clean it up. Is it pretty easy to get in there and renew seals and gaskets? Anything else worth doing if I go that far? (Note too in the third picture there's a half-baked attempt to safety wire two of the bolts on the trumpet)