There are many reasons for the failure caused by excavator powerlessness. It is necessary to clearly understand the cause of the failure causing excavator powerlessness and inaction before we can know how to deal with the occurrence of such failure. This article will describe the maintenance examples of Hitachi zx360k-5a excavator.
First, don't panic when the excavator suddenly produces no action fault of the whole vehicle during construction. The main reason for the fault is that the pilot oil at the pilot handle of the excavator is cut off and can't reach.
Maintenance method:
1. What if the Hitachi zx360k-5a excavator works and the whole vehicle fails to move (weak)? First, the safety solenoid valve coil is damaged and does not work At this time, the problem can be solved as long as the solenoid valve coil is replaced with the travel solenoid valve coil on the side. Of course, the travel can only have a low gear In the future, just buy a coil and install it There is a problem with the circuit to the solenoid coil, and there is no power At this time, just switch the plug of the high-speed and low-speed solenoid valve to the safety solenoid valve Note that after the replacement, the high and low speed switch of walking is used to control whether there is action. At the same time, walking is only at low speed.
2. The problem was not solved after replacing the coil and wire head. At this time, it must be that the internal electromagnetic valve core is stuck with dirt At this time, just remove the coil, remove the valve element, clean the foreign matters and reassemble The most foolproof method is to tighten the emergency screw on the back of the safety solenoid valve, and then the construction can be resumed Do not let the safety lock lose its function. As long as the operating handle acts, the excavator will act accordingly. Drivers must pay attention to safety.
3. If none of the above methods can be solved, it may be that the pilot pump of your equipment has a problem or the oil outlet pressure is lower than. At this time, it is best to ask a professional service engineer to check and repair The whole car doesn't operate. It looks serious. In fact, it's the simplest fault. There's no big problem, let alone how much money it costs.
Related reading:
The problem of the high-pressure oil supply pump of the excavator occurs occasionally in some cases. It may be that the pressure in the common rail pump is absolutely greater than that of the oil pump. How can the oil get through? Very simply, the return oil from the lubricating camshaft of the oil transfer pump is introduced into the inlet of the oil transfer pump by the failed seal Can this sealing ring be removed and replaced? It can be replaced. Check the part number, disassemble the oil supply pump and replace the failed seal.
