As we all know, the road conditions of domestic construction sites are extremely complex. Excavators often need to climb slopes and go down pits. If they encounter roads with large slopes and muddy and slippery roads. So, what is the reason why the excavator is powerless? What should I do when the excavator is unable to swing, lift, retract and climb? This paper describes the maintenance of Komatsu excavator.
Specific details: Komatsu pc850-8 excavator operates walking or digging action after startup, and the machine has no power. The excavator has no power not only for walking and digging, but also for turning, lifting, retracting and climbing It has been more than a week since there was no force.
Analysis reason:
It may be that the Kunming Komatsu pc850-8 excavator is unable to lift and retract its arms and climb the slope
1. The excavator throttle switch is not working properly.
2. The engine of the Komatsu excavator operates under reduced load.
3. Excavator electronic system failure.
4. Excavator battery power is low or ECM circuit is grounded.
5. The fuel injection driving pressure of Komatsu excavator is too low.
6. The fuel system of the excavator is faulty and the fuel supply is insufficient.
Troubleshooting:
1. The working device is weak due to on-site commissioning After the fault occurs, observe whether the display screen prompts the engine to run under load? [no]
3. Check whether the throttle switch operates normally? [normal] check whether the wiring of ecm70 pin connector, fuel injector connector and camshaft position sensor connector is installed correctly? [correct]
5. Check whether the power connector of ECM is loose? Is the circuit grounded? [all normal] check the fuel configuration, rated fuel limit value and FRC fuel limit value, and find that the rated fuel limit value is smaller than the specified value
7. Adjust the rated fuel limit value, start the test run, Komatsu pc850-8 excavator rotates, and there is no force to lift and retract the boom for climbing.
