Lowara
Worn Motor Bearings / Mechanical Wear
Pump is very noisy, with a loud grinding or rumbling sound during operation
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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
Aged or contaminated motor bearings, Misalignment between motor and pump wet end, Prolonged operation with vibration, Water ingress into bearing housing
How to Fix / Troubleshooting
Safety first: Turn off power before inspecting the pump. Do not run a pump with severe mechanical noise.
- Isolate the source: Use a mechanic’s stethoscope or a long screwdriver to listen at the motor body versus the pump housing. Bearing noise is usually loudest at the motor.
- Check for misalignment: Ensure the motor is correctly seated on the Lowara pump housing and that all mounting bolts are tight.
- Inspect for leaks: Look for water leaking from the mechanical seal area, which can migrate into bearings.
- Plan replacement: Motor bearing replacement requires disassembly and press tools. In many pool applications, replacing the motor or complete pump is more economical.
- When to call a pro: Have a technician confirm bearing failure and quote for repair or replacement.
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Repair Difficulty
Hard
4/5
Required Part
Lowara pool pump motor bearings
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