This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
How to change garage door opener gear and sproket assembly.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears.
041c4220a is a complete chain drive gear and sprocket replacement kit.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
Step 1 turn off the power.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
Disconnect the power cord from your door opener before doing any kind of repair.
Compatible with chamberlain models pd752 pd758s pd752d pd758d all models may not be listed.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
Replacement gear and sprocket assembly compatible with chamberlain estate series chain drive garage door openers.