Garage Door Chain Sprocket Tie Down

Activate the opener via remote control and watch the sprocket.

Garage door chain sprocket tie down.

Stand on a ladder so you can look down towards the top of the sprocket. Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand. I loosened the nuts to allow me to put it back on tightened it back up and now the door goes down but comes 1 3 of the way up again. Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor.

Drill through the sprocket and shaft and install a bolt hardened bolt if needed through the shaft. Liftmaster 41c4220a gear and sprocket kit for chamberlain sears craftsman and liftmaster 1 3 and 1 2 hp chain drive models 4 8 out of 5 stars 3 339 20 34 20. Lay the chain on the garage floor while you complete the repair. 34 1 02 oz 20 62 20 62.

Thread the nut s facing the door clockwise until it meets the bracket then release the chain. Place a stepladder near the motor and unplug the power cord for the motor from the electrical. When the sprocket rotates clockwise and stops by itself the motor will be in a closed position. I had a chain come off the sprocket on my chamberlain garage door opener.

Plug the opener back in. Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. When used on tube shafts it is advisable to fill the tube shaft with a steel or wood dowel in the area of the sprocket and through bolt the sprocket. I tried to work with the down screw to put it in reverse but that did not help.

Press down on the chain with your finger. Slide the outer trolley away from the inner trolley. Pull the chain toward the garage door and hold it in position. Pull the chain off the motor unit sprocket and out of the chain spreader.