How To Replace Worm Gear On Sears Garage Door Opener

My sears chain drive garage door opener s main gear is worn.

How to replace worm gear on sears garage door opener.

This turns the chain and moves the door. This turns the chain and moves the door. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. In most chamberlain liftmaster and sears openers a motor turns the worm gear and drive shaft inside the opener which rotates the sprocket attached to the top of the drive shaft.

I replaced just the main gear with the sprocket and shaft assembly for 25 or so from a supplie. The most common issue that occurs is when the ridges in the gear wear out because the gear lubrication has evaporated. This was a craftsman model 139 53976srt. This diy repair guide explains how to replace the drive and worm gears on a chain drive garage door opener.

The most common issue that occurs is when the ridges in the gear wear out because the gear lubrication has evaporated. Kit also fits chamberlain chain drive garage door opener models 1240r 1245r 1246r 1255r 1256r 2280 2280 267 and 2280 976. This is a video on how to change the gear sprockets in a craftsman garage door opener. If the gears break or strip the door won t move.

In most chamberlain liftmaster and sears openers a motor turns the worm gear and drive shaft inside the opener which rotates the sprocket attached to the top of the drive shaft. 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. 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.