Garage Door Opener Sprocket Sheared Off

Chain drive garage door openers have a sprocket that is attached at the top of the motor.

Garage door opener sprocket sheared off.

Chamberlain 1 25 hp myq secure view and ultra bright smart belt drive garage door opener with myq and wi fi compatibility and battery back up and led light and camera s item 1630354 model b6765. This garage door opener has a powerful dc motor with geniesense technology standard. It was a perfect replacement and the garage door is working. It will usually run about 200 00 total.

If the gear and sprocket assembly breaks the motor runs but the door won t move. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. You can put the chain back on your automatic garage door opener using a simple adjustment mechanism. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.

This gear and sprocket assembly is compatible with various chain drive garage door openers. I hope this will help. A new garage door open start around 130 00 plus installation. The bag said it was an oem piece.

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. Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears. The gear will cost about 50 00 with shipping and then the cost of having someone install it.

Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets. This was a craftsman model 139 53976srt. It wasn t listed for the same model but after looking online it seems that most garage door openers made after 1984 use the same sprocket assembly. This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday.

041c4220a is a complete chain drive gear and sprocket replacement kit.