Maintenance method and cause analysis of a Komatsu excavator with weak boom recovery. A Komatsu 225 excavator felt weak when the boom was retracted during operation
Common reasons for Komatsu excavator boom recovery failure:
1. Excavator boom cylinder fault
2. Excavator boom regeneration solenoid valve fault
3. Inappropriate flow adjustment of main pump of excavator
4. The excavator valve group is worn
Komatsu excavator boom recovery failure repair process:
1. Check the boom cylinder for damage and internal leakage. Check the boom regeneration solenoid valve for fault
2. Check whether the flow of the main pump is inappropriate. If it is too small, adjust it on the test bench Check whether the components in the valve group are worn. If they are worn to different degrees, install them for commissioning after maintenance, and the excavator boom recovery failure disappears
