Replacing Worm Gear Craftsman Garage Door Opener

Replaced gear and worm on craftsman 139 53970srt.

Replacing worm gear craftsman garage door opener.

Flip the motor unit over. This was a craftsman model 139 53976srt. Remove the screws from the motor unit cover and pull the motor unit cover off. Door now opens about 1 foot and stops.

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. Use a punch and hammer to drive the roll pin out of the drive shaft. Insert the new roll pin through the gear and drive shaft.

Remove the gear and sprocket assembly. Shredded plastic gears are a common problem with chain driven garage door openers. Fortunately the repair is neither difficult nor expensive and it should only take an hour of your time. 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. Step by step garage door opener gear fix. 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. 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.