This is a video on how to change the gear sprockets in a craftsman garage door opener.
Garage door chain sprocket replacement.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
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.
This was a craftsman model 139 53976srt.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
The process isn t as hard as you may think so consider the guide below.