Garage Door Chain Sprocket Replacement

If the gear and sprocket assembly breaks the motor runs but the door won t move.
Garage door chain sprocket replacement. Amazon s choice for craftsman garage door sprocket replacement for liftmaster 41c4220a gear and sprocket kit fits chamberlain sears craftsman 1 3 and 1 2 hp chain drive models 4 8 out of 5 stars 1 216. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door. This was a craftsman model 139 53976srt. Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
Chain drive garage door openers have a sprocket that is attached at the top of the motor. Step 1 turn off the power. This is a video on how to change the gear sprockets in a craftsman garage door opener.