1. Mud pump vibration
1. Causes: the pump shaft is not concentric with the diesel engine (or motor), the impeller is unbalanced, or the bearing is damaged;
2. Solutions: adjust the concentricity, perform a balance test on the impeller, and replace the bearing.
2. Low outlet pressure and low flow rate
1. Causes: air inside the pump, excessive clearance between the impeller and the front liner plate, the clutch not engaging tightly, or wear of the impeller or liner plate;
2. Solutions: vent the gas inside the pump, adjust the clearance, adjust the clearance of the clutch friction plates, and replace the impeller or liner plate.
3. Slow water intake of the mud pump
1. Causes: excessive clearance between the front liner plate and the impeller, the outlet pipe failing to seal out air, or incomplete priming;
2. Solutions: adjust the clearance, adjust the outlet pipe, and install a vacuum pumping device.
4. Rapid wear of the impeller journal
1. Causes: low head of the high-pressure water pump, misaligned packing, or the pump shaft not being concentric with the rear cover;
2. Solutions: replace it with a high-pressure pump whose head is higher than that of the mud pump, replace the packing, and adjust the concentricity.
5. The mud pump does not draw water
1. Causes: insufficient priming water, inability to discharge air from the pump, air leakage in the suction pipe, or excessive clearance between the front liner plate and the impeller;
2. Original solutions: continue priming with water, check whether the pipeline leaks air, and adjust the clearance between the impeller and the front liner plate.
6. Rapid wear of the mud pump
1. Causes: poor construction environment (large particles), long transport distance, or a long water inlet pipeline;
2. Solutions: change the sand yard, add a booster unit, and shorten the water inlet pipe to reduce cavitation.