I have this Main pump it came off a bobcat 334 excavator it works perfectly , it will fit several bobcat models including 331, 325,231, 325 and several others, if you’re tractor lags power this could be your issue, I ended up with unit chasing a problem which turned out to be something else, these pumps cost thousands $ to buy new at dealer, if you have a older Bobcat excavator you might want to get this pump in your parts inventory . Call Tom at > 83one - 43one - zero 906