Garage Door Chain Sprocket Broke

If the sprocket is still on the top of the opener carefully remove the chain from the sprocket.

Garage door chain sprocket broke. Lay the chain on the garage floor while you complete the repair. A new front sprocket costs about 150 200 include the labor to install it. Keep your fingers on the sides of the chain at least three inches away from the sprocket lift up the chain and unwrap it from the sprocket. Pull the chain off the motor unit sprocket and out of the chain spreader.

Https amzn to 2uwvnkj i m working on a chain drive opener. Immediate troubleshooting is required and a new garage door chain will need to be installed in place of the old one. As a result the garage door will open a few inches and stop or it will close a few inches and reverse. This gear kit on amazon.

A broken garage door chain will immediately impact your garage door s operation and render its automatic motorized capability effectively useless. Slide the pulley toward the garage door until the chain is stretched tight then move it toward the motor until the middle of the chain touches the upper side of the chain arm. Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. Slide the outer trolley away from the inner trolley.

Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor. Pull the chain toward the garage door and hold it in position. Thread the nut s facing the door clockwise until it meets the bracket then release the chain. Tighten the bolts on.

This was a craftsman model 139 53976srt. If yours is a belt drive you need a kit like this https amzn to 2zqns. Press down on the chain with your finger. The front sprocket is at the end of the opener rail closest to the garage door opening.