Mighty Mule
Dry Bearings or Worn Internal Gears
High-pitched squealing or grinding noise from opener head during operation.
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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
Lack of lubrication on drive gear, Worn motor bearings, Misaligned drive shaft, Overloaded drive train from heavy door
How to Fix / Troubleshooting
Safety first: Disconnect power before removing the opener cover.
- Check door balance: Confirm the door is not overloading the opener. Have springs serviced if the door is heavy.
- Inspect internal gears: Remove the cover and look for metal or plastic shavings. If present, the gears may be wearing out.
- Lubricate: Apply a small amount of manufacturer-approved grease to the drive gear and moving metal contact points inside the opener.
- Assess bearings: If noise persists and appears to come from the motor, the motor bearings may be failing, requiring motor or opener replacement.
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Repair Difficulty
Hard
4/5
Required Part
Mighty Mule Drive Gear and Sprocket Kit
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