McCulloch Mechanical Noise / Bearing or Blade Fault

Robot mower is excessively noisy during operation compared to normal.

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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 cutting motor bearings, Damaged drive motor gearbox, Bent blade disc, Loose or damaged pivoting blades

How to Fix / Troubleshooting

Safety first: Turn OFF the main switch and wear gloves.

  • Identify noise source: Run the mower briefly while lifted slightly (blades disabled if possible) to determine if noise comes from wheels or blade area.
  • Inspect blade disc and blades: Check for bent disc, missing screws, or loose pivoting blades. Replace damaged parts.
  • Check wheel gearboxes: Spin wheels by hand and listen for grinding. Replace noisy drive motor/gearbox assemblies.
  • Inspect cutting motor: With blades removed, run the cutting motor. A loud whine or rumble suggests worn bearings and the motor should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Cutting Motor Assembly
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