Replacing Worm Gear Craftsman Garage Door Opener

Pull the drive gear off the drive shaft.

Replacing worm gear craftsman garage door opener.

Door now opens about 1 foot and stops. Replace the drive gear. Tried to adjust up and down limits with not success. This is a video on how to change the gear sprockets in a craftsman garage door opener.

So if you suddenly find that the motor on your garage door opener sounds like it s running but the door is not moving checking for worn gears is the first thing you should do. Flip the motor unit over. Insert the new roll pin through the gear and drive shaft. Remove the gear and sprocket assembly.

Slide the new drive gear onto the drive shaft and line up the mounting hole in the drive gear with the hole in the drive shaft. This was a craftsman model 139 53976srt. Remove the screws from the motor unit cover and pull the motor unit cover off. Shredded plastic gears are a common problem with chain driven garage door openers.

Replaced gear and worm on craftsman 139 53970srt. I did the repairs with the door fully closed. Remove the light covers and light bulbs from the motor unit. Remove the screws from the chain spreader and pull the chain spreader off the motor unit.