The production practice has proved that it is very important to diagnose and maintain the common faults of hydraulic excavator quickly and accurately, which is an important guarantee to determine the engineering indexes, and can guarantee the engineering quality, safety, construction period and good social and economic benefits. There are many fault forms of hydraulic excavators. The research on common fault diagnosis and maintenance key technologies of hydraulic excavators can get twice the result with half the effort. In actual diagnosis and maintenance of hydraulic excavators, it is necessary to follow the principle of "first easy, then difficult, first external, then internal, first important, then general" to analyze and solve problems. It is necessary to check the external leakage of the excavator, check the oil quantity, oil quality, blockage and wear condition of components, judge the equipment fault phenomenon and state detection parameters in time, analyze the causes of the fault and put forward the troubleshooting methods, so that the hydraulic excavator can quickly adapt to the changeable environment, give full play to its stability performance, improve the reliability of its hydraulic system, and greatly reduce its failure rate, Ensure its safe and efficient work, extend its service life.
