When it comes to garage door opener replacement parts liftmaster can help you find what you need.
Garage door gear motor.
This was a craftsman model 139 53976srt.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
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Explore a wide variety of garage door motors and electrical parts with detailed descriptions and learn how these parts are compatible with specific garage door openers find the garage door motors and electrical parts you need to get the job done.
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If the gear and sprocket assembly breaks the motor runs but the door won t move.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.