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1.故障现象1台长期在选矿厂尾矿库工地作业的原装日立ZAXIS350LC-3型挖掘机使用3752h后,作业过程中有时出现柴油机动力不足、全机动作缓慢故障。故障发生后,切断电源线或者带电拔掉泵扭矩电磁阀、泵2的流量电磁阀(比例电磁阀)插头数次,就能恢复正常。因赶工期须使用该挖掘机,所以未将挖掘机开回车间修理,驾驶员采用上述方法维持该挖掘机继续使用了3个月,直到该故障频繁发生,无法继续使用,才将该
1. Symptom After a long period of 3752h operation of the original Hitachi ZAXIS350LC-3 excavator working at the tailings dam site of the concentrator, the diesel engine sometimes runs out of motivation during the operation, and the entire machine moves slowly. After the fault, cut off the power cord or unplug the pump torque solenoid valve, pump 2 flow solenoid valve (proportional solenoid valve) plug several times, you can return to normal. Due to the time of the need to use the excavator, it did not open the excavator back to shop repairs, the driver using the above method to maintain the excavator continued to use for 3 months until the fault occurs frequently, can not continue to use before the