Garage Door Opener Sprocket Sheared Off

This was a craftsman model 139 53976srt.

Garage door opener sprocket sheared off.

This is a video on how to change the gear sprockets in a craftsman garage door opener. Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears. You can put the chain back on your automatic garage door opener using a simple adjustment mechanism. It was a perfect replacement and the garage door is working.

This garage door opener has a powerful dc motor with geniesense technology standard. 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. Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets. Chain driven garage door openers should have some slack in the chain for optimal performance.

The gear will cost about 50 00 with shipping and then the cost of having someone install it. Garage door openers. If the gear and sprocket assembly breaks the motor runs but the door won t move. This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday.

It will usually run about 200 00 total. I hope this will help. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. The bag said it was an oem piece.

Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door. 041c4220a is a complete chain drive gear and sprocket replacement kit. This gear and sprocket assembly is compatible with various chain drive garage door openers. A new garage door open start around 130 00 plus installation.

Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.