Maintenance of hydraulic excavator 

Schools with rich experience in excavator maintenance training point out that hydraulic equipment generally has a high failure rate due to design, manufacturing, transportation, installation, debugging and other reasons in the early stage of use. With the extension of running time and the continuous elimination of the problem, the fault string will gradually decrease. In the later stage of equipment use, due to wear, corrosion, aging fatigue, etc. during long-term use, the number of faults gradually increases. Only in the middle of use does the equipment failure tend to be random and stable, that is, the effective working life of the equipment. However, if it is not used improperly or potential faults are not diagnosed and eliminated in time, even during the effective life period, sudden and serious faults cannot be ruled out. Therefore, careful study and summary of equipment faults and diagnostic techniques are the prerequisite for correct and timely troubleshooting of various faults.　　
　　液压挖掘机在一些特殊场合作业后，往往需要对设备进行保养，下面就来看看在寒冷地区与灰尘区工作后，要做哪些保养吧。　　
　　1.液压挖掘机在寒冷地区作业后的保养措施除应进行正常的例保作业外，还应特别注意以下两点:　　
　　(1)防止行走部位冻结，工作完毕后，要把枯在车体上的泥用水清洗干净，并把机械停放在混凝土或木板或者坚固干燥的地面上。　　
　　(2)幻活塞杆的防冻，作业结束后，液压缸的活塞杆要最大限度地缩回来。如果活塞杆露在外面，杆表面上会因空气中水分凝集而冻结，或者因粘附的土冻结，造成端盖密封件的损坏。
　　2.液压挖掘机在灰尘多的场地作业后的保养措施有以下几点:　　
　　(1)作业结束后要清扫空气过滤器；　
　　(2)要将堆积在暖气装置、油冷却器上的灰尘清除干净；　
　　(3)经常对油料进行检查，定期使用液压油过滤机对油进行处理。防止灰尘混进工作油、燃油中去；　
　　(4)作业后及时洗车，不要让沾附的灰尘变成污垢积存下来。