I purchased a Kubota B7200HST for an excellent price because the mower deck gear box was seized. It is amazing how they don't run without lube. I managed to disassemble the gear box and replace (4) bearings and (2) seals and the deck works perfectly.
After using it for a while I smelled belt and smoke from under the hood. The Dinamo (generator) seized up. I just replaced (3) bearings in that (easier than the gearbox) and I will put it back on the tractor tonight.
When it was running it mowed through the roughest nastiest stuff with tons of power---no problem. I am very excited to get this tractor running again. I am sure it was an awesome tractor in it's day and it will be again.