Garage Door Chain Sprocket Tie Down

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.

Garage door chain sprocket tie down.

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. Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. Stand on a ladder so you can look down towards the top of the sprocket. This sprocket is typically used on a soled keyed garage door shaft.

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. Lay the chain on the garage floor while you complete the repair. Drill through the sprocket and shaft and install a bolt hardened bolt if needed through the shaft. I had a chain come off the sprocket on my chamberlain garage door opener.

Can be used on tube shafts. When the sprocket rotates clockwise and stops by itself the motor will be in a closed position. Plug the opener back in. Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand.

Activate the opener via remote control and watch the sprocket. Loosen the chain or belt tension and slip the chain or belt off the sprocket. 34 1 02 oz 20 62 20 62. Place a stepladder near the motor and unplug the power cord for the motor from the electrical.

Press down on the chain with your finger. Pull the chain toward the garage door and hold it in position. Grasp the chain 1 foot from where it connects to the end of the threaded chain anchor. Thread the nut s facing the door clockwise until it meets the bracket then release the chain.