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@KN6KXR i tore one motor down and rebuilt it. Took about 1hr after i got it opened up. Putting it back together though, i couldnt get it perfectly back aligned to where i could spin the sq drive or the output shaft by hand. So i snugged the bolts down to where the shaft would barely turn by...

@KN6KXR The other motor doesnt have a drain port, and i guess i need to pull the allen head pipe plug and drill a small hole in it to relieve any potential pressure build up and leak through on the inner shaft seal. When i pulled the plug on disassembly, a little fluid came out. The motor...

Evidently i got the assembly of the motor right. The output shaft could be turn easily by hand before disassembly, but needed a socket on the square drive portion of the shaft to line the keyways up. I ran the motor both directions from, paying all the way out and back in 10x with no leakage.

attached are the PDFs for the motors. The TM is not specific to only the crane winch motors on the M936.

Not sure how many different motors are there, but here are two different ones i have. The top 2 pics are of the motor i just replaced both seals for output shaft and oring on the seal retainer housing. It can be seen that the output shaft support bearings between the two motors are in...

I just got all the seals and o rings in to rebuild both my winch motors today. Will start messing with one tomorrow. Those motors are a brute to move, just takes some grunting and straining to get them separated from the gearbox. if anyone needs the drawing with part numbers, let me know.