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| John Deere Tractors Discussion Forum |
Topic: 7405 hyd. problem
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| fgoeckner
07-24-2012 08:24:50
67.142.130.18
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We have a 7405 with a 740 loader with 2500 hrs. on it. Hydraulics got working real slow so we changed the hyd. pump. Put one on that was 4cc larger. Everything worked great for a couple of months then the hydaulics slowed. Checked pressures and found we have only 600 to 800 psi at low idle on both steering circuit and scv circuit. At fast idle had 3100 psi on both circuits. Thought we had an internal leak in the priority valve so we changed it. This did not fix our problem. We isolated the steering circuit and have checked the scv's for leaks. Does anyone have any ideas on were to look. Thanks Ken
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