Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
Sears garage door opener gear replacement instructions.
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Sears garage door opener selections includes 1 2 horsepower 3 4 horsepower belt and chain drive as well as the craftsman smart control garage door opener which allows you to control and monitor your garage door even when you are away from home.
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This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
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If the gear and sprocket assembly breaks the motor runs but the door won t move.
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Tck tech replacement for liftmaster 41c4220a gear and sprocket kit fits chamberlain sears craftsman 1 3 and 1 2 hp chain drive models.
Craftsman series 100 garage door opener with battery backup 2 remotes deluxe console keyless entry 1hp ultra quiet belt drive motor.