Posted by buickanddeere on October 02, 2012 at 15:30:33 from (173.241.102.148):
In Reply to: Re: 301 reverser help posted by RGMartin on October 02, 2012 at 15:10:35:
Adjusting a relief valve only regulates the max pressure. More shims and holding a valve closed tighter, that is already closed. Is not going to raise the pressure. Isolate the high-low pack supply and measure trans oil pressure. The high-low pack maybe leaking. Either pump is pumping air from a suction side leak. The suction side is restricted. The pump output restriction has been reduced due to leak(s). Or the pump is worn out. Anything hydraulic changed or added on the tractor? How are the high pressure functions? 2250 psi for the power steering, loader, backhoe etc? Which valve and where exactly are you tinkering with?
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