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Sometimes a picture can speak a thousand words. That could help you ID the thing if you can't find the numbers. The numbers you gave are either foriegn to me, or incomplete. The A--.... number appears to be an incomplete serial number, with the "A" indicating a Belgian assembled tractor. The rest of them don't mean a thing to me. However, if you look on the bellhousing, aft of the starter, you should see a horizontal, machined flat spot. Here, you should find the serial number, the model number, and the "UNIT" number. They will be hand stamped, probably not very deeply, and perhaps eroded away by battery acid at this point. Anyway, that's where they're supposed to be. Now to the other questions.... 1. If this is a 4000 "All Purpose", then no, I do not believe that that axle pivot pin can be replaced. It's fitted as part of the axle center section. If it has the "swept back" utility axle, then yes, I do believe that the pin can be replaced. So be careful of what you're ordering there. I guess you could machine an weld in a new pair of pins for the "AP" axle if you wanted to. 2. Described above. 3. Not sure on that. I thought the pan could be dropped without removing anything else... but i'd have to look again to refresh my memory. 4. Yes, to replace the axle shaft seal, the axle must be removed, the brakes pulled out, the reduction gears removed, and then the axle shaft removed. Don't forget the lock on the axle shaft bolt... Change the seal, and retorque the axle shaft to spec to set the preload.
If you're just changing the boot on the brake rod, then you just take the brak linkage apart on the outside. There is no need to separate the axle. Good luck. Rod
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