DAB Worn or Failed Motor Bearings

Pump is very noisy, with a loud grinding or screeching sound from the motor end

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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

Age‑related bearing wear, Water ingress past mechanical seal into motor, Misalignment between motor and wet end, Corrosion from chemical exposure

How to Fix / Troubleshooting

Safety first: Turn off power and lock out the breaker. Do not run a pump with failing bearings; it can seize and overheat.

Steps to check:

  • Isolate the noise: Use a mechanic's stethoscope or a long screwdriver to listen at the motor body vs the wet end. Bearing noise is usually loudest at the motor.
  • Check for shaft play: With power off, try moving the motor shaft up/down and side to side. Excessive play indicates bearing failure.
  • Inspect for leaks: Look for water trails between the pump housing and motor flange, indicating a failed mechanical seal that may have damaged the bearings.
  • Repair: Replace the motor bearings or the complete DAB motor assembly. Also replace the mechanical seal to prevent repeat failure.
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Repair Difficulty

Hard 4/5

Required Part

DAB pump motor bearings
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