Regarding excavator walking failures, most of the reasons are related to the hydraulic system. Today, I have summarized the walking faults caused by several common causes and told you where the faults are.
A Hitachi ZX240-3 type excavator in the project used to be unable to walk when working on the site. It cannot be walked on one side. The two pedals can only move together. Now the bucket moves in a single action, whether it is idle or idle No fuel truck can support it. The total pressure is normal and the rotation pressure is too low. I found a repairman in the local area to check that the big pump was worn out, and the new big pump was tested. There was no change in the old appearance. What caused the Hitachi ZX240-3 excavator to walk slowly and weakly, and the bucket was weak.
Basic information of excavator
Equipment brand: Hitachi
Equipment model: ZX240-3
Release date: July 2014
Working time: 4000 hours
Hitachi ZX240-3 excavator walking slow and weak, bucket failure analysis:
1 Center oil seal.
2 The oil pressure is too low.
3 Replace the oil seal in the oil distribution and try it out, it is time to repair the distribution valve.
4 Circuit problems.
5 Is the excavator walking on the right side? If it is a problem with the check valve.
6 Main control valve There are two check valves disassembled near the oil pipe from the main pump to see if there is a problem.
7 Increase the pressure of the rotary walking relief valve, do the oil cylinder, the pressure test of the walking terminal, and the second pilot pressure test to determine whether the fault can be in place.
8 There is a problem with the multi-way valve.
9 Check whether the pressure and power of the hydraulic system are normal. If it is not normal, it will also cause the Hitachi ZX240-3 excavator to walk slowly and weakly, and the bucket will fail.
