The efficiency of a hydraulic system mainly depends on the volumetric efficiency of the hydraulic pump. When the volumetric efficiency drops to 72%, routine maintenance is required, including replacing bearings and aging seals, and replacing or repairing friction pairs that exceed the fit clearance to restore their performance.　

The auxiliary machining process of hydraulic valves mainly includes valve body sand cleaning, component deburring, heat treatment residue removal, and cleaning of valve body sand.　

Pingmei Machinery is a coal mining machinery manufacturing enterprise located in our city, and its leading product hydraulic support has reached the forefront of domestic and international standards.