You got to remember some new tractors today arnt ment to grease. Thats why no zerks. Thats part of there (the makers) plan is to crudely LET THEM WARE OUT. That way YOU have to spend more $$$ to have it fixed. Or replace it. And trying to grease sealed bearings does no good. There sealed. The only way you can grease SOME sealed bearings is to dis-assyemble that part, pry the rubber seals off the bearings and pack them with grease and try to get the seal back in there. And even then there's nothing saying the seal will stay put after it's been broken for the first time. NOTE: I wouldnt do this if your machine is still under warantee.