Garage Door Opener Sprocket Sheared Off

The gear will cost about 50 00 with shipping and then the cost of having someone install it.

Garage door opener sprocket sheared off. Chamberlain 1 25 hp myq secure view and ultra bright smart belt drive garage door opener with myq and wi fi compatibility and battery back up and led light and camera s item 1630354 model b6765. Remove the 3 nuts and bolts that mount the gear and sprocket to the base of the opener. This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday. I hope this will help.

It was a perfect replacement and the garage door is working. I had to replace the gear and sprocket assembly after the sprocket got sheared off likely due to too much play in the chain. This will loosen the chain and give you more slack to place the chain back over the sprockets. Slide the pulley toward the garage door until the chain is stretched tight then move it toward the motor until the middle of the chain touches the upper side of the chain arm.

This can be replaced in about an hour. A new garage door open start around 130 00 plus installation. Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears. It will usually run about 200 00 total.

The bag said it was an oem piece. In order to get the sprocket you have to order the gear and sprocket assembly. This was a craftsman model 139 53976srt. This is a video on how to change the gear sprockets in a craftsman garage door opener.

The replacement of this part is relatively straight forward and the instructions that come with the part part number 41c4220a are clear. Tighten the bolts on. It wasn t listed for the same model but after looking online it seems that most garage door openers made after 1984 use the same sprocket assembly. Turn the nut s facing the opener motor one half turn clockwise by hand.

Loosen the nut s facing the door five full turns with a 7 16 inch wrench. Garage door openers. Slide the outer trolley away from the inner trolley. There should be one or two nuts at each side of the anchor.

This gear and sprocket assembly is compatible with various chain drive garage door openers. Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. 041c4220a is a complete chain drive gear and sprocket replacement kit. To replace the gear and sprocket assembly remove the chain from the sprocket.