Garage Door Sprocket Broke Off

This is a video on how to change the gear sprockets in a craftsman garage door opener.

Garage door sprocket broke off.

Sometimes it was taking several tries sometimes it was going fine the first time. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door. This gives the appearance of a broken chain or belt. You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.

Can be used on tube shafts. This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday. It was a perfect replacement and the garage door is working. We carry many other garage door sprockets several for various brands and models of garage door opener sprockets.

Sprocket is at the end of the opener rail closest to the garage door opening. This sprocket is typically used on a soled keyed garage door shaft. 2 od x 3 4 stand off. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.

After several years the garage door springs become weaker causing more stress on. Eventually this will cause the sprocket to snap off. Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets. Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.

Chain driven garage door openers should have some slack in the chain for optimal performance. If the gear and sprocket assembly breaks the motor runs but the door won t move. Garage opener sprocket broke off i already had problems as the door would move a little trying to close then back open. The bag said it was an oem piece.

One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket. If you are not confident in your ability to diagnose the problem call a local garage door service company. Chain drive garage door openers have a sprocket that is attached at the top of the motor. This was a craftsman model 139 53976srt.

The chain wraps around this sprocket as well as the gear and sprocket at the motor.