Tesvor Main Brush Gearbox or Bearing Damage

Robot makes loud grinding or rattling noises from the brush area during cleaning.

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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

Debris inside brush gearbox, Worn brush bearings, Stripped gears in brush drive, Bent motor shaft

How to Fix / Troubleshooting

Safety first: Turn off and flip the robot over. Do not run the robot while disassembled.

Initial inspection:

  • Remove the main brush and run the robot briefly. If the noise persists without the brush, the gearbox or motor is the source.
  • If the noise disappears, inspect the brush end caps and bearings for wear or damage and replace the brush if needed.

Gearbox check (advanced):

  • Remove the bottom cover to access the main brush motor and gearbox.
  • Inspect for broken plastic gears, debris, or signs of overheating.

Repair: In most cases, replacing the entire main brush motor/gearbox assembly is more reliable than attempting to repair individual gears. Reassemble carefully and test. If you are not comfortable with this level of disassembly, seek professional service.

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Repair Difficulty

Hard 4/5

Required Part

Main Brush Motor Assembly
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