Garage Door Opener Sprocket Sheared Off

Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.

Garage door opener sprocket sheared off.

Chain drive garage door openers have a sprocket that is attached at the top of the motor. This was a craftsman model 139 53976srt. I had to replace the gear and sprocket assembly after the sprocket got sheared off likely due to too much play in the chain. When the garage door goes off track it can be a serious inconvenience.

The bag said it was an oem piece. From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. My door won t go up.

The motor runs but nothing happens. This is a video on how to change the gear sprockets in a craftsman garage door opener. This gear kit on amazon. If the gear and sprocket assembly breaks the motor runs but the door won t move.

The most likely cause of a door that won t go up is a broken spring. If yours is a belt drive you need a kit like this https amzn to 2zqns. Most likely caused by a worn out gear inside the opener or a sheared off sprocket at the top. It was a perfect replacement and the garage door is working.

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. The replacement of this part is relatively straight forward and the instructions that come with the part part number 41c4220a are clear. If you find that your garage door opener chain falls off the track on which it has been placed you will need to put it back up and then tighten the chain to stop this happening in the future.

Https amzn to 2uwvnkj i m working on a chain drive opener.