BFT Gearbox Wear or Internal Bearing Failure

Garage door opener is very noisy, with grinding or rumbling sounds from the operator head.

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.

Possible Causes

Worn gears in BFT gearbox, Lack of lubrication inside gearbox, Worn motor bearings, Misalignment between motor and gearbox

Safety: Disconnect power before opening the operator housing.

Localize noise: Listen carefully to determine if noise comes from the operator head, rail, or door hardware.
Inspect gearbox: Open the BFT operator cover and check for metal shavings, leaked grease, or play in the output shaft.
Check mounting: Ensure the operator is firmly mounted and not vibrating against the ceiling or bracket.
Replace assembly: Internal gearbox repairs are usually not field-serviceable; replace the motor/gearbox assembly as a unit.

Hard 4/5

BFT Motor/Gearbox Assembly

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