Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
Garage door chain sprocket replacement.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
The process isn t as hard as you may think so consider the guide below.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
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.
Step 1 turn off the power.