English
English Severe wear and tear of the hydraulic
pump has a fatal impact on the excavator, so such problems must be
solved in time for the excavator. When repairing the hydraulic pump of
an excavator, find the cause of the failure from the following three
points:
(1) Check the internal leakage of the boom cylinder
The easiest way to repair the
hydraulic pump of an excavator is to raise the boom to see if there is
an obvious free fall. If the drop is obvious, disassemble the oil
cylinder for inspection, and replace the sealing ring if it is worn.
(2) Check the control valve
First, clean the safety valve and
check whether the valve core is worn or not. If it is worn, replace it.
If there is no change after the safety valve is installed, check the
abrasion of the control valve spool. The use limit of the clearance is
generally 0.06MM. If the safety valve is severely worn, it should be
replaced.
(3) Measure the pressure of hydraulic pump
If the pressure is low, adjust it. If
the pressure still cannot be adjusted, it means that the hydraulic pump
is severely worn.
