TerraMow Mechanical Noise / Bearing Wear

Robot lawnmower is excessively noisy during operation, with grinding or rattling sounds 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 blade motor bearings, Loose blade disc, Debris trapped in cutting deck, Worn drive wheel bearings

How to Fix / Troubleshooting

Safety: Turn OFF the mower, remove the key (if equipped), and wear gloves before working near the blades.

  • Inspect cutting deck: Turn the TerraMow over and remove any built-up grass, twigs, or stones from around the blade disc and deck.
  • Check blade disc tightness: Ensure the blade disc retaining bolt is tightened to the manufacturer’s specification. Do not overtighten.
  • Spin components by hand: Rotate the blade disc and drive wheels manually. Listen for grinding or roughness that indicates worn bearings.
  • Replace worn parts: If noise is localized to the blade area, replace the TerraMow blade motor. If it comes from the wheels, replace the TerraMow drive wheel or drive motor assembly with worn bearings.
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Repair Difficulty

Hard 4/5

Required Part

TerraMow Blade Motor
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