Bosch
Cutting Deck Mechanical Damage
Robot mower makes loud grinding or rattling noise from underside while mowing
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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
Bent blade disc, Foreign object trapped between disc and deck, Loose blade screws, Worn blade disc bearings
How to Fix / Troubleshooting
Safety: Immediately stop the mower with the STOP button, turn OFF the main switch, disconnect the dock, and wear gloves.
- Inspect underside: Look for stones, branches, or toys lodged near the disc. Remove all foreign objects.
- Check blades and screws: Ensure all blades are present, pivot freely, and that their screws are tight.
- Spin disc by hand: Listen for scraping or grinding. Any contact with the deck indicates a bent disc or bearing issue.
- Replace damaged parts: Install a new blade disc assembly or cutting motor bearing kit if available for your model.
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Repair Difficulty
Medium
3/5
Required Part
Blade Disc Assembly
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