How To Replace A Garage Door Opener Gear

Use all necessary replacement parts and reassemble the garage door opener in the reverse order.

How to replace a garage door opener gear.

Install the new worm gear making sure the roll pin is properly seated in the new gear. Shine the flashlight directly at the gear set. Position a work table near the area under your motor unit to hold the garage door opener during the repair. If the gears have screwed up teeth you can likely just replace them to solve the problem.

Release the tension on the belt with the small lever near the gear. Pull the emergency release rope to release the trolley from the garage door. Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener. If you have any other broken gears or parts replace those as well.

Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley. Lay the chain on the garage floor while you complete the repair. I only had one stripped gear while the rest of the parts looked ok. Step 5 replace garage door opener gear.

Shut the garage door if it s not already closed. Remove the 3 nuts that hold the motor to the frame and then remove the worm gear. Press this lever and you will be able to remove the belt from the gear and pulley. If not your opener might simply be shot and you ll need a new one.

Pull the chain off the motor unit sprocket and out of the chain spreader. Remove the fastener ring from the straight door arm connected to the outer trolley. Only replace the parts that are used on your garage door opener. Remove retaining screws from the cover.

This was a craftsman model 139 53976srt. Push the pin in with a nail set in order to remove the gear. Slide the outer trolley away from the inner trolley. Re install other components in reverse order.

This is a video on how to change the gear sprockets in a craftsman garage door opener.