The serious wear of hydraulic pump has a fatal impact on the excavator, so such problems must be solved in time. During the maintenance of excavator hydraulic pump, find out the fault causes from the following three points:
(1) Check the boom cylinder for internal leakage
The simplest maintenance method of excavator hydraulic pump is to raise the boom to see if it has 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. If worn, replace it. If there is still no change after the installation of the safety valve, check the wear of the control valve core. The service limit of the clearance is generally 0.06mm, and it shall be replaced if it is seriously worn.
(3) Measure the pressure of the hydraulic pump
If the pressure is low, adjust it. If the pressure cannot be adjusted, it indicates that the hydraulic pump is seriously worn.
