1. The entire vehicle is weak and moves slowly. After inspection, the valve for merging and diverting is stuck and cleaned, and it works normally
2. When the lifting arm of the machine is unable to perform other actions due to force or overflow, the automatic excavation of the small arm is preliminarily judged to be caused by the deformation of the pressure compensation valve and valve hole seat of the device rod HI valve, which cannot be sealed, resulting in internal oil leakage. The PLS pressure is also caused by the internal leakage of the oil. The feedback pressure of the pump before the internal leakage decreases, and the angle of the inclined plate decreases. The pump displacement decreases and the action is slow. After replacing the new bucket rod pressure compensation valve and repairing the valve seat, the machine is tested and checked for normal operation
3. The whole vehicle is unable to move slowly. After replacing the pressure compensation valve carbon ring, the machine was tested and the operation was normal. The second level pressure reached 329KG/CM2, and the fault was eliminated
