1. Pump vibration

Reason: The pump shaft is not concentric with the diesel engine (or motor), the impeller is unbalanced, and the bearings are damaged;

Solution: Adjust concentricity, conduct balance testing on impeller, and replace bearings.

2. Slow water filling on the pump

Reason: The gap between the front lining plate and the impeller is large, the water outlet pipe cannot seal the air, and it can be fully emptied;

Solution: Adjust the gap, adjust the water outlet pipeline, and install a vacuum device.

3. The pump does not absorb water

Reason: Insufficient water injection, inability to discharge air from the pump, air leakage in the suction pipe, large gap between the front lining plate and the impeller;

Solution: Continue to inject water, check if there is any air leakage in the pipeline, and adjust the gap between the impeller and the front lining plate.

4. Outlet pressure

Reason: There is air inside the pump, there is a large gap between the impeller and the front lining plate, the clutch is not tightly closed, and the impeller or lining plate is worn;

Solution: Drain the gas from the pump, adjust the clearance between the clutch friction plates, and replace the impeller or lining plate.

5. The pump wears out quickly

Reason: Poor construction environment (large particles), long transportation distance, and long inlet pipeline;

Solution: Replace the sand field, add a booster unit, shorten the length of the inlet pipe to reduce cavitation

6. The impeller journal wears out quickly

Reason: Low head of high-pressure water pump, misaligned packing, pump shaft and rear cover not concentric;

Solution: Replace the high-pressure pump with a head higher than the mud pump, replace the packing, and adjust the concentricity.