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Hydraulic pump?
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Posted by Ken on September 26, 1999 at 20:10:43 from (205.168.177.172):
I have an IH wheel loader/ backhoe, 1972, 3500A.
The backhoe has very little power, the loader has more power but seems slow. I have tested the backhoe cylinders for internal leaks, (the dipper cylinder leaks, all the rest are ok). I put a pressure gauge on the boom circuit (directly behind the control valve) it showed a pressure of 700# while raising the boom and a pressure of 1000# when the cylinder was fully retracted. When I put the pressure gauge on the loader boom (left side) it achived a pressure of 1200# and 1500#.
I think I need to rebuild or replace the main pump.
Am I on the right track? Or should I be looking at the MCV pump? I don't have access to a flow meter, so the pressure gauge is my best diagnostic tool.
Also does anyone have a ballpark $ figure to rebuild or replace the pumps?
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