once you have the centering plate, and levers off you'll see 4 bolts around each pintle shaft, removed the bolts and the centering plate mounts, and pull the smaller plate off the top of the pump. seals are set in a counterbore in the plate. the oring (actually a square cut ring) sists in a recess around the outside of the bearing. dont panic if the bearing pushes up a little when you remove the plate, install the new seal and quad ring, and push the bearing back down with the plate.Can the Pintle shaft seal be replaced in the unit? Do you know of any write ups on the process of how to do it?
Does the whine go away when the brake is off?So I finally got around to replacing all the seals and lever parts. Creep is completely gone and no leaks! Win. But now I have drive whine. No lift whine. Everything was cleaned extensively before changing out so I’m lost as to why. Any recommendations? It had zero whine prior.
No there’s actually no whine until you move the controls to drive. Almost like the breaks engaged really. But it’s reading off. No codesDoes the whine go away when the brake is off?
A slight whining might be associated with a minor creep.
Does it go away if you ease fwd or regular on either side?
No there’s actually no whine until you move the controls to drive. Almost like the breaks engaged really. But it’s reading off. No codes
Okay then it’s def not that. No real difference besides severe whine. No power loss no shutter. Any other ideas?if the brake isnt fully releasing, or "hanging up" you may have (literally) a seat of the pants feel. typically the brake will "shudder" when it's not fully released. the brake spool and coil are in a small valve block (usually) located underneath where the 4 drive hoses are connected to the hydrostat.
Okay then it’s def not that. No real difference besides severe whine. No power loss no shutter. Any other ideas?
Prior it was only on startup that you’d have to screw with it while engaged till you found neutral then there was zero whine while operating. This is now at any movement in the drive controls and at all rpms. I just pulled the case drain filters and they look good.maybe as f'd up as the steering was to start with, you never noticed the noise...?
DIYDAVE on my T300 bobcat it had very little power on the right hand track. Plus while pushing the steering stick on that side, it would make an awful squaling sound. I removed the pressure pump and then the hydraulic pump for the right side. I took it apart and found the valve plate was scratched badly, which caused less hydraulic pressure being produces and supplied to the drive motor.If it whines, First thing I generally try is to see if there are any leaks on the suction side...