Jon,

I have operated/serviced an early 90's JD 750 with the type 2 closing wheel setup your talking about. When the bearings go out, we put in a new ring, new seal, 2 new bearings and also replace the stamped dust cap. The seal was always lubed with regular gun grease, nothing special. I don't remember seeing any special grease mentioned in the manual. Is this something your JD dealer recommended, or?

We replaced all boots, blades, and bearings a couple winters ago. The seals were lubed well upon reassembly but we still had some issues with the bearings going out. Upon dissassembly, the seal was shot. Is it because we didn't use that special grease?

The thing just plants 300 acres of wheat a year now and I don't have to run it so it doesn't matter to me but I just wonder what you thought.

It used to see about 1200 acres a year of soybeans plus the 300 acres of wheat.  It spends most of its time under a roof unless it is in the field.

Mike