Guess my problem
 

Recently I got a 1250, 782 and a 782 roller, only thing is it won't roll. The wheels turn individually but not together so I know the differential is probably OK. I don't have time to get in to it now, so I'm looking for guesses what could be frozen. It has sat outside for a long time. Besides the front axle, the hydraulic valve is the only thing that will move. It will be for sale.

The brake is stuck if it is an cast rear end.

Has external brakes, the internal brake was stuck on the other one

Remove the relief valves and see if it rolls then, or the pump must have had an internal explosion, you can salvage the ported side of the pump and use it on the 1250 and add hydraulics to it.

Never thought about the relief valves. Will check tomorrow

Might this be a problem? More Pictures to follow. The one valve lost its insides.

No more guessing, the missing parts just dropped down, the small spring was completely rusted up and the motor section was stuck. Maybe with complete tear down, thorough cleanup and a new valve, it might work, idk.