If the gears break or strip the door won t move.
Worm gear garage door opener.
Chamberlain 41c4220a garage door opener gear and sprocket assembly genuine original equipment manufacturer oem part 4 8 out of 5 stars 141.
This diy repair guide explains how to replace the drive and worm gears on a chain drive garage door opener.
Drive and worm gear kit 41c4220a is an original equipment manufacturer oem part that fits most craftsman 139 series chain drive garage door openers manufactured after 1993.
Kit also fits chamberlain chain drive garage door opener models 1240r 1245r 1246r 1255r 1256r 2280 2280 267 and 2280 976.
Cnbtr 0 5 modulus brass metal worm speed reducer with 60 teeth worm wheel 5mm bore gear shaft 5 0 out of 5 stars 6.
Shredded plastic gears are a common problem with chain driven garage door openers.
The worm gear which attaches to the motor shaft meshes with the drive gear to spin the sprocket and drive the chain to open and close the garage door.
This drive gear and worm kit is compatible with most 1 2hp belt and chain drive garage door openers manufactured after 1993.
Kit also fits chamberlain chain drive garage door opener models 1240r 1245r 1246r 1255r 1256r 2280 2280 267 and 2280 976.
Drive and worm gear kit 41c4220a is an original equipment manufacturer oem part that fits most craftsman 139 series chain drive garage door openers manufactured after 1993.
1 helical gear 1 worm gear 1 grease wear bushings and hardware needed to replace the gears.
Fortunately the repair is neither difficult nor expensive and it should only take an hour of your time.