Jim Pollock
Member
Well we bought a new drive for the pump. The one with the rubber bushings. This didn't help it much. We put a gauge in the rear outlet and the pressure is around 1600 but the needle fluctuates back and forth about 200 psi. Then we took off what we thought was the priority valve that is mounted up under the cowl on the right side. I believe this actually just a connector for all the lines. There is absolutely nothing inside except drilled passages. We then put the gauge on the line coming directly from the pump. We are getting a fluctuating needle here also. It goes from about 2500 to 2000 real fast and as soon the engine shuts off it goes to zero. So I am leaning toward the pump being the problem. It seems to have a stuck piston or the valves are leaking badly or something. I know you can buy a rebuild kit from deere but it looks like only O-rings. Anybody had any luck rebuilding these or not. Could it just be the stroke control valve?
By the way this pump does have a destroking screw on the bottom of the pump and when I screw the screw in it does destroke the pump and it quits making noise all together and also the hydraulics quits working as it should.
By the way this pump does have a destroking screw on the bottom of the pump and when I screw the screw in it does destroke the pump and it quits making noise all together and also the hydraulics quits working as it should.