Most of the reasons for the traveling fault of excavator are related to the hydraulic system. Today, I have summarized several common causes of walking faults and told you where the causes of the faults are.
A Hitachi zx240-3 excavator used to be unable to walk when working on the construction site. It can only move when stepping on one side. The two pedals work together. Now the single action of the bucket can't dig the soil. It can't support either idling or refueling trucks The total pressure is too low for normal travel and rotation. I found a local repairman to check that the big pump was worn out. I replaced it with a new one for test run, but it still remained the same as before. What caused the Hitachi zx240-3 excavator to walk slowly and powerlessly, and the bucket was powerless.
Basic information of excavator
Equipment brand: Hitachi
Equipment model: zx240-3
Ex factory date: July, 2014
Working hours: 4000 hours
The Hitachi zx240-3 excavator is slow and weak, and the bucket is weak. Cause analysis:
1 Center sub oil seal
2 the oil pressure is too low
3. Replace the oil seal in the oil separator. If it fails, the distribution valve should be repaired
4 circuit problems
5 does the excavator have a right travel? If so, it should be the problem of the check valve.
6 there are two check valves near the oil pipe from the main pump of the main control valve. Disassemble them to see if there is any problem
7. Increase the pressure of the rotary travel overflow valve, conduct the pressure test of the oil cylinder and travel terminal separately, and conduct the secondary pilot pressure test to judge that the fault can be in place
8 there is a problem with the multi-way valve.
9. Check whether the pressure and force of the hydraulic system are normal. If not, the Hitachi zx240-3 excavator will be slow and weak, and the bucket will be weak. Increase the test bench to detect the pressure and force.
