Hello Our XL80 blew a hose and lost all hydraulic fluid. Replaced hose and refilled fluid. The steering assist works but no forks up down or tilt or side shift. Then we replaced the pump. Now steering still has plenty of pressure but the forks won't move at all unless the engine rpm is quite high and then they move very slowly. This is a two stage pump. Does both the steering and forks. Tried adjusting the flow priority valve with no results. Anybody else have a problem like this? S/N F005D6406N Thanks very much......Dave