Replacing Worm Gear Craftsman Garage Door Opener

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.

Replacing worm gear craftsman garage door opener.

I did the repairs with the door fully closed. Shredded plastic gears are a common problem with chain driven garage door openers. Remove the screws from the chain spreader and pull the chain spreader off the motor unit. Replace the drive gear.

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. Remove the screws from the motor unit cover and pull the motor unit cover off. Flip the motor unit over. Door now opens about 1 foot and stops.

This is a video on how to change the gear sprockets in a craftsman garage door opener. Tried to adjust up and down limits with not success. Replaced gear and worm on craftsman 139 53970srt. Pull the drive gear off the drive shaft.

Use a punch and hammer to drive the roll pin out of the drive shaft. Remove the gear and sprocket assembly. 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.