Garage Door Opener Sprocket Sheared Off

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.

Garage door opener sprocket sheared off.

The most likely cause of a door that won t go up is a broken spring. The motor runs but nothing happens. From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.

Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door. It was a perfect replacement and the garage door is working. Chain drive garage door openers have a sprocket that is attached at the top of the motor. I had to replace the gear and sprocket assembly after the sprocket got sheared off likely due to too much play in the chain.

Find the chamberlain garage door opener technical support you need to get your garage door opener operational. This was a craftsman model 139 53976srt. When the garage door goes off track it can be a serious inconvenience. My door won t go up.

This gear kit on amazon. Https amzn to 2uwvnkj i m working on a chain drive opener. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. Most likely caused by a worn out gear inside the opener or a sheared off sprocket at the top.

The bag said it was an oem piece. This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday. This can be replaced in about an hour. This is a video on how to change the gear sprockets in a craftsman garage door opener.

If yours is a belt drive you need a kit like this https amzn to 2zqns.