I have a 25hp Agtrac tractor. Bought on Marketplace, first mistake... Replace all hoses/lines from Control to FEL... Rebuilt all FEL cylinders. FEL works but is weak. Only lift about 300 lbs. Bought gauge and checked pressure. At fast idle - 800 to 900 psi. At 2000 rpm 1100 psi. The Pump has...