Ive got a Allis Chalmers 615 backhoe, It runs good and has it's problems but when you try to move loader or backhoe pump makes a growling sound. When its ideling or moving it around it dosent make any funny sounds. It only does it when you try to dig or move loader. Hydraulics move fast but seems kinda weak in hoe. Could it be pump or a resriction in fluid ? Any help will; be greatly appreciated, THANKS
restriction or low fluid will make the pump growl look for a strainer or filter on the pump suction line from the fluid tank don't keep using this will harm the pump GL