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. Remove the light covers and light bulbs from the motor unit. 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.

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Step by step garage door opener gear fix.

Replacing worm gear craftsman garage door opener.

This is a video on how to change the gear sprockets in a craftsman garage door opener. Remove the gear and sprocket assembly. Shredded plastic gears are a common problem with chain driven garage door openers. Replace the drive gear.

This was a craftsman model 139 53976srt. 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. Remove the screws from the motor unit cover and pull the motor unit cover off.

Door now opens about 1 foot and stops. Remove the screws from the chain spreader and pull the chain spreader off the motor unit. I did the repairs with the door fully closed. Flip the motor unit over.

Tried to adjust up and down limits with not success. Pull the drive gear off the drive shaft. 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.

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