There are many reasons why the hydraulic system does not operate, including electrical and mechanical. If we want to find the reason, we usually adopt the elimination method!

You should understand the hydraulic schematic diagram before working. Understand the possible reasons for the failure, and then eliminate them step by step on site. First, observe the pressure gauge to see whether there is pressure in the system, the working status of the pump, and the position of the limit. Then observe the working position of the valve when the system is working normally. , and finally determine whether there is a problem with the hydraulic cylinder.

It has nothing to do with oil quality!

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