If the gear and sprocket assembly breaks the motor runs but the door won t move.
How to change garage door opener gear and sproket assembly.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
This was a craftsman model 139 53976srt.
Step 1 turn off the power.
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.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
041c4220a is a complete chain drive gear and sprocket replacement kit.
Disconnect the power cord from your door opener before doing any kind of repair.
Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears.
This gear and sprocket assembly is compatible with various chain drive garage door openers.