Glad I could help. They seem to be a figure-it-out-the -best-you-can tractor. There must be people out there who know some of this stuff, but you never seem to be able to find them when you need them.
The bearings I said could be greased will need to be tapped out and back in. Same idea as front wheel bearings on a car.
Some more info that may be helpful. Massey Ferguson sold this same tractor as a MF1120. You should be able to get some literature from AGCO for it, probably also some parts. I got some basic service and owner manuals and a parts manual. It has exploded diagrams for the tractor and part numbers, unfortunately the front PTO is an attachment and its not in there.You should also be able to source some parts at a Kubota dealer, they are similar tractors.I have bought U-joints from them for the mower.