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.

Garage door chain sprocket tie down.

Drill through the sprocket and shaft and install a bolt hardened bolt if needed through the shaft. 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. 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.

Thread the nut s facing the door clockwise until it meets the bracket then release the chain. Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand. Pull the chain off the motor unit sprocket and out of the chain spreader. When the sprocket rotates clockwise and stops by itself the motor will be in a closed position.

34 1 02 oz 20 62 20 62. Slide the outer trolley away from the inner trolley. Can be used on tube shafts. Stand on a ladder so you can look down towards the top of the sprocket.

Activate the opener via remote control and watch the sprocket. I had a chain come off the sprocket on my chamberlain garage door opener. 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. Plug the opener back in.

I tried to work with the down screw to put it in reverse but that did not help. 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. This sprocket is typically used on a soled keyed garage door shaft. Loosen the chain or belt tension and slip the chain or belt off the sprocket.