hydraulic pressure loss

[rockinmywaypa]

hydraulic pressure loss

Maybe somebody can help me out. I have a JD 3130 that loses its hydraulic pressur whenever I lower the 3 pt lift arms, as long as they are carried in the full highest spot everything is fine. I have a loader on that I mounted but this problem only started a few months ago. Ant ideas like could there be packings in the lift cylinder(rock shaft) that could be damaged. Thanks.

 

[MMM]

Re: hydraulic pressure loss

A little confusing. The pressure should drop when lowering hitch. Do you mean any position except max lift? Many tractors also go to low preesure mode at max height. Normally when a lift piston **** is bad, hitch will hiccup and not maintain any position(off or running). Possibly an unloading valve or position control spool problem. I think you need to invest in a repair manual, as most have general hyd troubleshoot section.