LiftMaster Screw Drive Coupler 25C20 Chamberlain Craftsman Garage Door Opener

This is exactly what I needed to fix my garage door opener. I am not much of a handy man but replacing this part was fairly simple and saved me hundreds of dollars by avoiding calling a repair company.

The old coupler on my Liftmaster 1/2 HP screw-drive opener broke when I pressed the button to open the garage door. I knew it had to be some sort of gearing failure since the motor was still running and lights still on. A quick check on Youtube led me to the plastic coupler, which is the designed failure point in the system that absorbs shock and keeps the screw or motor from breaking. Mine was shattered into about 8 pieces, probably just from age and fatigue (the opener is 16 years old). I found this part on Amazon and checked to ensure it would fit. Installation was pretty easy, but required a socket wrench to detach the screw track from the opener, and loosen the opener mounting straps so I could swing it away from the track to make room to insert the coupler between them. I had just enough room to work with my opener mounted about 6 inches from the ceiling. Before installing the coupler, I ran the motor to ensure it was all the way in the "down" direction, then turned the screw by hand to run the trolley all the way to the "down" position, so the door would run in the correct direction and distance when reconnected. After inserting the coupler, I lubed the screw, springs and wheels to keep everything running smoothly. It ran fine on the first try and needed just a small travel adjustment at both ends. I spent less than an hour on the repair and the coupler is working fine. Hopefully it will last another 16 years or more.

After removing a couple screws connecting the rail to the box, was able to remove the broken coupler and replace it with the new coupler. Fit just like the original and restored the opener to operating condition.

Form, fit , and function exactly as the original. Quality seems ok but we'll see how long it lasts. Previous part was there for at least 8+ yrs in a Texas garage where it gets to 105 deg in summer and sometimes into the teens in winter. Garage door is usually used multiple times a day. Easy ten minute fix if you have basic common sense mechanical ability.

Perfect fit for our Chamberlain 1/2 hp worm drive garage door opener. Was a little worried as this opener is over 20 years.

Bought this for my Craftsman 3/4 hp garage door opener, we use the garage door to get in and out of the house all day. This lasted 4.5 years with heavy use. I will be buying two this time so I will be ready next time in 4-5 years. This is designed to break if need be. Saved my motor. Much cheaper than a new motor.

These worked great. I saved having to pay a garage door person big $$$ and installed myself in 15 minutes. Easy. There are how to's on u tube

I have an 18 year old Craftsman opener and this part broke and went flying across the garage! Found quickly online. Recommend watching the YouTube videos on how to install. Read the reviews as a lot of important info there that will help also. IMPORTANT!!!! Figure out if your opener was in the down or up cycle when it broke as this is important. Mine was starting down so I made sure that after I installed the new one the opener would be in the down cycle when I pushed the button. Just run the opener and put your foot in front of the safety photo cells until it reverses and the lights blink...it is now up so the next time you push the button it will go down. My opener carrier block/slider was up toward the opener. I then just removed the 2 bolts that hold the rail to opener and it will slide back...put in new coupler then slide back and reinstall bolts. Run the opener WITHOUT door engaged and watch where the carrier block/slider stops. Adjust up and down travel on the opener until you have it where it should be....reconnect door to opener and check. You may have to fine tune up and down travel or up and down force. The entire process took about an hour and I'm old and slow. Hope this helps!