JD 490E Hydraulic System Problem

A 490E approaching 7,000 hrs in service was working, but running toward the hot side, when it suddenly lost power and will not spool up under load. Pressure relief valves were removed checked and replaced without any issues being found. The hydraulic tank filters were removed and inspected with no issues being found. Pilot filter was removed and replaced, again with no issues being found. The pilot pump was pressure tested and found to meet specifications. Pressure testing the main pump...

JD 490E Hydraulic System Problem

JD 490E Hydraulic System Problem