If the gear and sprocket assembly breaks the motor runs but the door won t move.
Plastic gear for sears garage door opener.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
Sold by diyrepair parts.
Gear sprocket kit door opener gear kit 1 3 1 2hp liftmaster sears craftsman garage door opener part.
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Liftmaster 41a5585 replacement gear sprocket assembly kit garage door openers 34 95 liftmaster 41a5668 gear sprocket assembly for ats211x ats2113x garage opener.