Makita
Mechanical Noise / Worn Bearings
Robot mower is very loud during operation, with grinding or rattling noises from underneath
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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 blade disc, Foreign object contacting blades, Worn drive motor gearbox
How to Fix / Troubleshooting
Safety: Turn OFF the mower, remove from lawn, and wear gloves.
- Isolate noise source: Run the mower briefly upside down with blades disabled if possible (or listen carefully during operation) to determine if noise comes from cutting disc or wheels.
- Inspect cutting system: Flip the mower and check the blade disc and blades for damage or contact with the chassis. Remove any trapped debris.
- Spin components by hand: Rotate the blade disc and each wheel. Roughness, grinding, or play indicates worn bearings or gearbox.
- Replace worn parts: Install a new Makita cutting motor assembly or drive motor/gearbox if mechanical wear is evident.
Operating with severe grinding noises can lead to further damage; schedule service promptly if you cannot resolve the cause.
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Repair Difficulty
Hard
4/5
Required Part
Cutting Motor Assembly
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