三, The pressure cannot rise
1. The oil pump is not supplying oil or the flow rate is insufficient
Exclusion method: Exclude according to the above method
2. The pressure adjusted by the overflow valve is too low or there is a malfunction
Exclusion method: readjust the pressure of the overflow valve or repair the overflow valve
3. There is a leak in the system
Exclusion method: Check the system or repair the leakage point
4. The oil pump has been working for a long time, and the screws on the pump cover have become loose
Exclusion method: Tighten the screws appropriately
5. Inhalation pipeline leakage
Exclusion method: Check all connections and seal and tighten them. 6. Insufficient oil absorption
Exclusion method: Same as the previous exclusion method
四, Excessive noise
1. Inhalation pipeline leakage
Exclusion method: Check the oil suction pipeline, seal and tighten it tightly
2. Insufficient oil absorption
Exclusion method: Exclude according to the above method
3. The pump shaft is not concentric with the prime mover
Exclusion method: Reinstall to achieve the required accuracy in the manual
4. There are bubbles in the oil
Exclusion method: Add oil or take structural measures to immerse the oil return port below the oil level
5. Pump speed too high
6. Pump pressure too high
Exclusion method: If the pressure of the pump drops below the rated pressure
7. Leakage at the shaft seal
Exclusion method: Replace the oil seal
