Common Faults and Troubleshooting Methods for Mud Pumps

Pump Vibration

• Causes: Misalignment between pump shaft and diesel engine (or motor), unbalanced impeller, damaged bearings.

• Solutions: Adjust alignment, perform balance testing on the impeller, replace bearings.

Slow Water Intake

• Causes: Excessive clearance between front liner plate and impeller, air trapped in the discharge pipeline, insufficient venting.

• Solutions: Adjust clearance, adjust the discharge pipeline, install a vacuum priming device.

Pump Fails to Prime

• Causes: Insufficient priming water, air trapped inside the pump, air leakage in the suction pipe, excessive clearance between front liner plate and impeller.

• Solutions: Continue priming, check pipeline for air leakage, adjust clearance between impeller and front liner plate.

Discharge Pressure Issues – Low Pressure, Low Flow

• Causes: Air inside the pump, excessive clearance between impeller and front liner plate, loose clutch engagement, worn impeller or liner plate.

• Solutions: Vent air from the pump, adjust clearances, adjust clutch friction plate clearance, replace impeller or liner plate.

Rapid Pump Wear

• Causes: Poor working conditions (large abrasive particles), long conveying distance, lengthy suction pipeline.

• Solutions: Change sand source, add a booster unit, shorten suction pipe length to reduce cavitation.

Rapid Wear of Impeller Shaft Neck

• Causes: Low head pressure of high-pressure water pump, misaligned packing, misalignment between pump shaft and rear cover.

• Solutions: Replace with a high-pressure pump with higher head than the mud pump, replace packing, adjust alignment.