Garage Door Opener Sprocket Broke Off

You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.

Garage door opener sprocket broke off.

The chain wraps around this sprocket as well as the gear and sprocket at the motor. If the gear and sprocket assembly breaks the motor runs but the door won t move. A new front sprocket costs about 150 200 include the labor to install it. Chain driven garage door openers should have some slack in the chain for optimal performance.

Eventually this will cause the sprocket to snap off. One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket. This was a craftsman model 139 53976srt. Chain drive garage door openers have a sprocket that is attached at the top of the motor.

If you are not confident in your ability to diagnose the problem call a local garage door service company. This gives the appearance of a broken chain or belt. Sprocket is at the end of the opener rail closest to the garage door opening. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.

Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door. This is a video on how to change the gear sprockets in a craftsman garage door opener. After several years the garage door springs become weaker causing more stress on.