Cat 3535 oil leak

[Rudy]

I have a Cat 3535 that's leaking oil. If I fill the crankcase to the top of the "dot"....within a month or so, it's down to the bottom of the "dot". It's hard to see where it's leaking from. The rear crankcase cover, and drain plug are bone dry. My best guess is the oil seal on the crankshaft (the pulley side). There's oil on my pump stand....but (again), I can't really find the source of the leak.

Can this seal be replaced from the outside (without pulling the crankshaft)? The bearings are quiet.

 

[MEP001]

Yes, the cover comes off with the seal in it. The seal goes in the backside so you have to remove the cover to replace it, so you might want to order a new o-ring for that too.