Komatsu 130 excavator walking slow and weak reason

Fault phenomenon:

"I have a Komatsu 130-7 excavator. I have done more than 2,000 hours. I have no power to dig and break. It has been digging for a few days and it is powerful. After that, it is powerless. What is the reason?"

Failure analysis:

Komatsu 130 excavator walking slow and weak reason

1 First check the pilot pressure to see if the pilot pressure is within the normal range, and find the abnormality to adjust;

2 The one-way valve inside the multi-way valve is damaged, resulting in poor sealing, resulting in increased pressure. At this time, the displacement of the pump reaches the minimum, so there will be a slow running failure.

3 There is also the possibility that the pilot control oil pressure is too low, and the oil pressure needs to be adjusted;

4 It may be the failure of the secondary relief valve. The secondary relief valve is damaged and causes malfunction. It needs to be replaced.

5 It is also necessary to pay attention to whether the seal ring of the central swivel joint is damaged or not, if it is damaged, replace it with a new one;

6 It is also possible that the inside of the traveling motor has been damaged, resulting in serious internal leakage of the motor, which causes the Komatsu 130 to walk slowly and weakly;

Troubleshooting:

Komatsu 130 excavator walking slow and weak reason

1 Adjust the pilot pressure

2 Replace the broken check valve

3 Adjusting oil pressure

4 Replace the secondary relief valve

5 Replace the central swivel joint seal

6 Repair or replace the travel motor

The above is a common fault phenomenon, fault analysis and fault resolution method for the faults related to the "Katsumatsu 130 excavator walking slow and weak", which is based on the maintenance experience of the Komatsu excavator for many years.