2, second, there may be Komatsu excavator safety switch lock fault.
3, there is also the possibility that the excavator ppc lock solenoid valve coil is faulty.
4, or Komatsu excavator assembly diode do1 failure.
5, the wire harness is disconnected.
6, Komatsu excavator wire harness ground fault.
The above is to lead to the emergence of "excavator walking and rotary can not move" failure phenomenon of the six common causes, the following for you to explain in detail:
1, if the Komatsu excavator fuse blown No. 3, it is very likely that the excavator circuit in the ground faults, which led to the emergence of the excavator walking and turning can not be moved to the fault.
2, excavator safety switch locking fault, possible internal disconnection.
3, Komatsu excavator ppc locking solenoid valve coil failure, specifically may be the excavator ppc locking solenoid valve line internal disconnect or line short circuit.
4, to know whether the assembly diode do1 failure, you can specifically check the resistance value between the sub-line, if not for the specified resistance value that is the line failure.
5, wire harness short circuit, may be Komatsu excavator engine internal and connector between the harness is disconnected, or with the connector between the harness has poor contact.
6, to know is not the cause of the failure of six causes failure, just check the resistance value between the wire harness.
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