(1) Determine the nature and severity of the fault. According to the site conditions, determine whether there is a fault, what kind of problem (pressure, speed, action or other), and the severity of the problem (normal, minor fault, general fault or serious fault).


(2) Find the failed component and the failed location. According to the symptom and related information, find the fault point in order to further eliminate the fault. The main point here is to clarify where the problem lies.


(3) Further search for the initial cause of the failure, such as hydraulic oil pollution, low reliability of hydraulic components of Parker vane pump accessories, and unsatisfactory environmental factors. Here mainly to clarify the external causes of failure.


(4) Mechanism analysis. Carry out in-depth analysis and discussion on the causal chain of the fault to understand the ins and outs of the problem.


(5) Troubleshoot. The main purpose is to eliminate the various factors that caused the failure and restore the system to normal.