Replacement gear and sprocket assembly compatible with chamberlain estate series chain drive garage door openers.
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.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
This was a craftsman model 139 53976srt.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
Step 1 turn off the power.
Disconnect the power cord from your door opener before doing any kind of repair.
041c4220a is a complete chain drive gear and sprocket replacement kit.