U.S. Motors
Impeller Damage or Debris
U.S. Motors pool pump is noisy with a rattling or grinding sound from the wet end; flow is reduced.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Broken impeller vanes, Stones or hard debris lodged in impeller, Worn diffuser or volute causing impeller contact, Cavitation damage from running with low suction head
How to Fix / Troubleshooting
Safety first: Turn off power and close suction and return valves before opening the pump.
- Inspect basket and suction: Remove the pump lid and basket. Check for debris that may have passed into the impeller.
- Open the wet end: Remove the bolts or clamp band securing the pump housing to the motor. Separate the housing to access the impeller and diffuser.
- Check impeller condition: Inspect for cracked or missing vanes, and remove any stones or debris. Replace the impeller if damaged.
- Inspect diffuser and volute: Look for wear or grooves where the impeller may be rubbing. Replace worn diffuser or housing components.
- Reassemble and test: Reassemble the pump with new gaskets/O-rings as needed. Prime the pump and test for smooth, quiet operation and restored flow.
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Repair Difficulty
Medium
3/5
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