Garage Door Chain Gear Broke

Pull the chain toward the garage door and hold it in position.

Garage door chain gear broke.

Periodic maintenance of a liftmaster chain driven garage door opener includes lubricating the chain and greasing the chain rail. I hope this will help. Immediate troubleshooting is required and a new garage door chain will need to be installed in place of the old one. Loosen the bolts on the chain pulley that s attached at the top of the arm and slide the pulley one inch toward the motor.

The gear and sprocket assembly is inside the cover of the garage door opener motor. The gear will cost about 50 00 with shipping and then the cost of having someone install it. Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor. Pull the chain off the motor unit sprocket and out of the chain spreader.

Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. How to lubricate a liftmaster chain driven garage door opener. If the chain on your garage door is rusty you need to apply lubricant into it to loosen the corrosion. A new garage door open start around 130 00 plus installation.

Press down on the chain with your finger. Thread the nut s facing the door clockwise until it meets the bracket then release the chain. A broken garage door chain will immediately impact your garage door s operation and render its automatic motorized capability effectively useless. If your chain is badly corroded you may need to remove the chain from the carriage assembly and soak it in lubricant for a few hours.

To do this put some lubricant on a piece of rag this use the rag to wipe the chain. The most common cause of a chain being loose and appearing broken is a broken gear and sprocket. Move the ladder to the outer end of the chain arm near the garage door. Garage door openers.

Lay the chain on the garage floor while you complete the repair.