Garage Door Chain Sprocket Broke

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

Garage door chain sprocket broke.

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. This was a craftsman model 139 53976srt. 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. If yours is a belt drive you need a kit like this https amzn to 2zqns.

Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor. Slide the outer trolley away from the inner trolley. If the sprocket is still on the top of the opener carefully remove the chain from the sprocket. Thread the nut s facing the door clockwise until it meets the bracket then release the chain.

Immediate troubleshooting is required and a new garage door chain will need to be installed in place of the old one. The chain wraps around this sprocket as well as the gear and sprocket at the motor. Another common cause for a loose chain could be the front sprocket breaking. Pull the chain off the motor unit sprocket and out of the chain spreader.

As a result the garage door will open a few inches and stop or it will close a few inches and reverse. Https amzn to 2uwvnkj i m working on a chain drive opener. Tighten the bolts on. A broken garage door chain will immediately impact your garage door s operation and render its automatic motorized capability effectively useless.

This gear kit on amazon. Pull the chain toward the garage door and hold it in position. A new front sprocket costs about 150 200 include the labor to install it. Lay the chain on the garage floor while you complete the repair.