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Pollack Pete, It's possible your front bearing is siezing as it is a large roller bearing. You will probably want to replace it irregardless, as long as you are this far into the tractor. Watch out, they are expensive. It's possible too, if you don't have the distributor, oil pump, and their shaft out, that there could be some binding in there. The rear bearing is just a main-thrust bearing, could be possible that it is galled, you'll sure know when you take it off. If it looks fairly good have it miked at the machine shop along with the rod throws and bearings. Just get the number off the rear seal and any bearing house can supply it, as can NAPA probably. The front seal is a felt stuffed into that wierd stamped steel, bell shaped combination dust shield-front crankshaft seal. I don't know what the guys are doing when they work on these, they are no longer available from AGCO. I've been getting a felt from a truck supply company that is close in dimension, and stuffing it back in after prying the old one out. I can get the number for you if you wish to go that route. It seems to work well.
Hope this helps. Jim P.S. I think you've got the hard part done, in getting the stuck pistons out!
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