John Deere 844b

Looking for info on this particular loader. Internet has very little info. Looking to buy a low hours unit with engine issues. Runs and drives but according to seller needs 1 head gasket done on V8 diesel. He did one side and it was better but still needs other side for a pressure issue with cooling system. Any other things to watch? I did find on the Ag forums that the motor used in these was not the greatest in a tractor but in a loader was ok. Any info would be...

John Deere 844b

John Deere 844b