51 b john deere

I had the same leak on both sides of my 1950 B. On the operators left side, I removed the bearing cup/cover assembly. No parts moved or fell out. I cleaned the metal shim the best I could. It had no paper gaskets installed so I put a tiny 1/16 inch round bead of silicone black rtv gasket sealant goo on both sides of the metal shim, reassembled and tightened everything back down. I no longer have a leak.
More than likely I wont have any problems with a leak in this area again but I may not have done this correctly or like everyone else would have. I have not tackled the right side of the tractor yet. We'll see how it goes.

My two cents,

MACE

If I understand your description, you are talking about the left hand differential bearing quill. The gaskets on the left hand quill are used to adjust the side to side clearance of the differential. You probably do not want to disturb this without being prepared to split the tractor if something goes wrong. If you pull the quill, you are also pulling the lefthand differential bearing cup. The gaskets consist of a steel shim as well as a number of paper gaskets. John Deere still sells the gaskets.

I would try to tighten the bolts holding the quill first, and see if you can stop the leak that way. If you do pull it apart, try to save the gaskets so you can mic how thick the assembly is.

Good luck,

Kurt