Disconnect the power cord from your door opener before doing any kind of repair.
How to change garage door opener gear and sproket assembly.
041c4220a is a complete chain drive gear and sprocket replacement kit.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive 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.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
This gear and sprocket assembly is compatible with various chain drive garage door openers.
Step 1 turn off the power.
This was a craftsman model 139 53976srt.
Compatible with chamberlain models pd752 pd758s pd752d pd758d all models may not be listed.
Replacement gear and sprocket assembly compatible with chamberlain estate series chain drive garage door openers.
This is a video on how to change the gear sprockets in a craftsman garage door opener.