Https amzn to 2uwvnkj i m working on a chain drive opener.
Garage door chain sprocket replacement.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
Step 1 turn off the power.
This was a craftsman model 139 53976srt.
If yours is a belt drive you need a kit like this https amzn to 2zqns.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
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.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
The process isn t as hard as you may think so consider the guide below.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.