W-type vacuum pump and troubleshooting common phenomenon: the vacuum is too low Cause: 1. Inhalation gas temperature is too high 2. Gas valve and valve seat contact poor 3. Gas valve rupture, spring damage 4. Cylinder and piston ring gap Too large 5. End cap and piston clearance is too large Elimination method: 1. Add cooling device cooling gas 2. Scraping 3. Replacement 4. Replace the piston ring 5. Adjust the gap phenomenon: Motor overload reasons: 1. Eccentric ring gap Small 2. Rod burnout 3. Poor exhaust Elimination Methods: 1. Adjust the gap 2. Repair or replacement 3. Check the clear phenomenon: Impact sound during operation Reason: 1. Piston rod nut loose 2. Connecting rod bushing And Crosshead pin wear 3. Connecting rod bush clearance is too large 4. Defective eccentric ring detritus 5. There are debris in the cylinder Elimination: 1. Fastening 2. Repair replacement 3. Re-investigation or replacement 4. Shim pad adjustment 5. Clean up the debris in the cylinder