长臂挖掘机

省时 省力 省财富

挖掘机遇到故障时需要进行故障排查，在排查问题前需要对挖掘机整机进行排查故障前确认的相关事项后开始进行故障排查，以下就是长臂挖掘机整机操作无动作故障排查前需要确认的几个项目。

When the excavator encounters a fault, it needs to carry out troubleshooting. Before troubleshooting, it is necessary to carry out troubleshooting on the whole excavator after confirming the relevant items before troubleshooting. The following are the items that need to be confirmed before troubleshooting the complete operation of the long-arm excavator.

①操作先到手柄，大臂、小臂、铲斗都没有动作；

① Operate the handle first, and the boom, jib and bucket do not move;

操作检查：同时操作回转和行走；

Operation inspection: simultaneously operate slewing and walking;

原因分析：若回转与行走也无动作，可能安全杆存在故障；

Cause analysis: if there is no action for rotation and walking, the safety bar may be faulty;

维修建议：

Maintenance suggestions:

1.修复安全杆电磁阀，若连接电源也无法正常工作，可能是线圈烧坏或阀芯卡死，需要更换电磁阀；

1. Repair the solenoid valve of the safety bar. If the power supply is connected and it cannot work normally, the coil may be burnt or the valve core may be stuck, and the solenoid valve needs to be replaced;

2.电磁阀可以正常工作，可能是齿轮泵损坏或先导溢流阀出现了故障，导致先导回路无法建立压力，需要测量先导压力，确认主泵是否有损坏是否需要更换。

2. The solenoid valve can work normally. It may be due to the damage of the gear pump or the failure of the pilot overflow valve, resulting in the failure of the pilot circuit to establish pressure. It is necessary to measure the pilot pressure to confirm whether the main pump is damaged and whether it needs to be replaced.

②大臂、小臂、铲斗油缸回收机外摆时无力；

② The boom, jib and bucket oil cylinder recovery machine is weak when swinging outward;

操作检查：测量主溢流阀压力；

Operation inspection: measure the pressure of the main relief valve;

原因分析：可能主溢流阀压力过低，即受到很小的负载就会被打开，导致液压油直接回油箱，工作装置无法发挥其应有的性能；

Cause analysis: the pressure of the main overflow valve may be too low, that is, it will be opened under a very small load, resulting in the direct return of hydraulic oil to the tank, and the working device cannot play its due role;

维修建议：将主溢流阀压力调节到操作说明书规定值。

Maintenance suggestion: adjust the pressure of the main relief valve to the value specified in the operating instructions.

③大臂、小臂、颤抖油缸回收机外摆动作慢；

③ The boom, jib and trembling oil cylinder reclaimer swing out slowly;

操作检查：确认工作模式、发动机转速，并测量先导压力；

Operation check: confirm the working mode, engine speed, and measure the pilot pressure;

原因分析：速度慢是由于提供给作业装置的流量不足引起的，先导压力过小，阀芯无法被全部打开；模式选择是否是微操作或简单操作，降低了发动机转速，减少了主泵的流量；流量控制阀被开启或打开状态下被卡死；

Cause analysis: the slow speed is caused by insufficient flow provided to the operating device. The pilot pressure is too small, and the valve core cannot be fully opened; Whether the mode selection is micro-operation or simple operation reduces the engine speed and the flow of the main pump; The flow control valve is opened or stuck in the open state;

维修建议：

Maintenance suggestions:

1.将先导压力调节到操作手册要求的数值；

1. Adjust the pilot pressure to the value required by the operation manual;

2.选择正确的工作模式，无法选择模式，或先导指示灯已经切换，但发动机转速、流量无变化时，排查控制器故障；

2. When the correct working mode is selected and the mode cannot be selected, or the pilot indicator has been switched, but the engine speed and flow have not changed, troubleshoot the controller;

3.流量电磁阀是否处于工作状态。

3. Check whether the flow solenoid valve is in working condition.

如果您的挖机在施工过程中遇到了整机操作无动作的故障,可以按照以上方法进行简单检查排查,如果还不能解决故障，建议还是直接询问专门的维修师傅了！关注我们http://www.dybocheng.com，了解相关的使用事项！

If your excavator encounters a fault that the whole machine does not work during construction, you can simply check and troubleshoot it according to the above methods. If the fault cannot be solved, it is recommended to ask the special maintenance technician directly! Follow us http://www.dybocheng.com , understand the relevant use matters!