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.
Plug the opener back in.
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.
Drill through the sprocket and shaft and install a bolt hardened bolt if needed through the 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.
Loosen the chain or belt tension and slip the chain or belt off the sprocket.
Place a stepladder near the motor and unplug the power cord for the motor from the electrical.
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.
34 1 02 oz 20 62 20 62.
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.
Can be used on tube shafts.
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.
Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley.
Pull the chain off the motor unit sprocket and out of the chain spreader.
This sprocket is typically used on a soled keyed garage door shaft.
Pull the chain toward the garage door and hold it in position.
Slide the outer trolley away from the inner trolley.
Lay the chain on the garage floor while you complete the repair.