Numatic Brush Motor Torque Loss

Brush roller turns intermittently or stops under light load.

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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

Worn carbon brushes in brush motor, Overheated or partially shorted motor windings, High friction in brush bearings, Failing brush motor capacitor (if fitted)

How to Fix / Troubleshooting

Safety first: Unplug the machine before accessing the motor.

  • Check mechanical drag: Remove the belt and spin the brush by hand. If stiff, service or replace the brush assembly.
  • Inspect motor brushes: Access the brush motor and check the carbon brushes for length and free movement. Replace if worn.
  • Check capacitor: If your model uses a start/run capacitor on the brush motor, inspect it for bulging or leakage and replace if suspect.
  • Test under no load: Run the motor without the belt. If it still stalls or surges, the motor itself is likely failing and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Brush Motor Assembly
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