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.
The process isn t as hard as you may think so consider the guide below.
Compatible with chamberlain models pd752 pd758s pd752d pd758d all models may not be listed.
041c4220a is a complete chain drive gear and sprocket replacement kit.
Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears.
This was a craftsman model 139 53976srt.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
Disconnect the power cord from your door opener before doing any kind of repair.
Step 1 turn off the power.
This gear and sprocket assembly is compatible with various chain drive garage door openers.