Garage Door Opener Sprocket Broke Off

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

Garage door opener sprocket broke off.

If you are not confident in your ability to diagnose the problem call a local garage door service company. You can put the chain back on your automatic garage door opener using a simple adjustment mechanism. Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets. Sprocket is at the end of the opener rail closest to the garage door opening.

Eventually this will cause the sprocket to snap off. This gives the appearance of a broken chain or belt. This is the part that connects the motor to the chain or belt. One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket.

Chain driven garage door openers should have some slack in the chain for optimal performance. A new front sprocket costs about 150 200 include the labor to install it. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. If the gear and sprocket assembly breaks the motor runs but the door won t move.

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.