What should be checked if the excavator is unable to dig

The main reasons for the lower working efficiency of the excavator are the weak digging of the bucket and the slow lifting speed. However, this fault seems simple and involves many components. This article will summarize the analysis of the reasons for the inability of bucket excavation. For reference only.
When the excavator is weak and the lifting speed is slow, the user is recommended to check the cause of the failure according to the following inspection sequence.
1. Check whether the pressure of self-reducing valve is normal
2. Check whether the bucket PPC valve leaks internally.
3. Check whether the main valve rod of the bucket is faulty.
4. Check whether the safety oil suction valve is faulty.
5. Check whether the oil seal of oil cylinder has internal leakage.
The path from the high-pressure oil of the main pump to the bucket cylinder includes the main pump, the main control valve, and the bucket cylinder. Find the position of corresponding parts according to this order for troubleshooting. The problem of weak digging can be solved.