Grundig Brush Roll Bearing / Gearbox Failure

Vacuum makes loud rattling or grinding noises from the floor head.

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Possible Causes

Worn brush roll end bearings, Foreign objects in brush housing, Damaged gear set in motorized head, Loose screws in nozzle housing

How to Fix / Troubleshooting

Safety first: Remove the battery pack and detach the floor nozzle.

  • 1. Open nozzle: Remove the bottom plate and take out the brush roll.
  • 2. Inspect bearings: Spin the brush roll by hand. If it grinds or wobbles, replace the brush roll assembly.
  • 3. Check for debris: Remove any small stones, hard plastic pieces, or other debris from the housing and around the motor/gearbox area.
  • 4. Tighten screws: Check all visible screws on the nozzle housing and tighten gently.
  • 5. If noise persists: The internal gearbox or brush motor is likely damaged. Replace the entire motorized floor nozzle assembly.
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Repair Difficulty

Easy 2/5

Required Part

Motorized Floor Nozzle Assembly
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