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In Reply to: JD 2020 troubles posted by Nathan Jacquin on Monday, November 02, 2009:
Well, no luck so far, I checked the intake screen filter, the pressure control valve, and the stroke control valve along with its filter. All these components are really clean and don"t show any visual signs of wear. Although the stroke control valve was shiny where it contacts the seat.
Also, I attempted to remove one main pump outlet valve. Unfortunately with the loader in the way my socket plus universal joint couldn't grab securely. I had to leave without sufficient time to spend breaking it loose.
Next, I added new fluid and ran through all the cycles for a half hour or so, it was all jumpy or barely functional at first with 2100psi standby. With slow improvements and occasional times when it worked perfectly smooth and normal, I thought I was getting somewhere. Then things started getting worse. I shut it down and re-checked the fluid, below the add mark...so I added more. Now suddenly there is really fluctuating standby pressure, anywhere from 100-2100psi. I tried to disconnect the loader and that didn"t seem to affect it at all. I am worried the valves in the pump are sticking, but not excited about taking the pump off to check all of them just yet, unless someone more wise suggests that I remove the main pump. Another thing that troubles me is that each time I replace the fluid it seems to get worse.
Any suggestions?
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