Hitachi ex120-3 excavator has no action
Excavators often encounter failures during construction, which brings us a lot of inconvenience and trouble! Today, we're going to share some tips on how to solve the problem of no action of Hitachi ex120-3 excavator in Baoji.
The solution of Hitachi ex120-3 excavator without action:
First of all, it is necessary to check whether there is a fault in the safety locking valve. If the safety lock valve is blocked or jammed, the oil can not push the main control valve through the proportional pressure control valve, and the whole vehicle will not act. This kind of fault can be solved by replacement.
Check whether the main overflow valve is faulty. If the spring in the main relief valve breaks or the set pressure is too small, the pressure of the whole system will be low, and the pressure of the pressure oil in the main pump will not be able to overcome the resistance of the actuator to work, which will lead to no action failure of the excavator.
