Garage Door Chain Sprocket Tie Down

Activate the opener via remote control and watch the sprocket.

Garage door chain sprocket tie down.

Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. Pull the chain toward the garage door and hold it in position. I tried to work with the down screw to put it in reverse but that did not help. Can be used on tube shafts.

Stand on a ladder so you can look down towards the top of the sprocket. 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. 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. When the sprocket rotates clockwise and stops by itself the motor will be in a closed position.

Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor. Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand. Place a stepladder near the motor and unplug the power cord for the motor from the electrical. 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.

I had a chain come off the sprocket on my chamberlain garage door opener. Slide the outer trolley away from the inner trolley. Plug the opener back in. Pull the chain off the motor unit sprocket and out of the chain spreader.

34 1 02 oz 20 62 20 62. This sprocket is typically used on a soled keyed garage door shaft. Drill through the sprocket and shaft and install a bolt hardened bolt if needed through the shaft. Lay the chain on the garage floor while you complete the repair.