Replacing Worm Gear Craftsman Garage Door Opener

Tried to adjust up and down limits with not success.

Replacing worm gear craftsman garage door opener.

Step by step garage door opener gear fix. 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. Use a punch and hammer to drive the roll pin out of the drive shaft. Pull the drive gear off the drive shaft.

Fortunately the repair is neither difficult nor expensive and it should only take an hour of your time. Replaced gear and worm on craftsman 139 53970srt. Shredded plastic gears are a common problem with chain driven garage door openers. This was a craftsman model 139 53976srt.

Remove the screws from the motor unit cover and pull the motor unit cover off. Insert the new roll pin through the gear and drive shaft. Replace the drive gear. Flip the motor unit over.

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. I did the repairs with the door fully closed. Remove the gear and sprocket assembly. This is a video on how to change the gear sprockets in a craftsman garage door opener.