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How to Replace a Broken Garage Door Chain

Chain driven garage door openers are very strong. It is rare that the chain will actually break. Many times you will find that it is not operating properly because it has a broken gear or socket or is just rusted. Neighborhood Garage Door Service of Kansas City, KS can assist you in troubleshooting a broken garage door chain.

Troubleshooting a Broken Garage Door Chain

After unplugging the motor, pull the chain and inspect it for damage of any kind. Next, you want to check the wiring and make sure it’s not a motor problem or rust in the carriage assembly. You can also soak the chain in lubricant at this time to see if that corrects the problem.

How to Stay Safe When Making The Repair

If you find that the chain does need to be replaced, make sure all power to the opener remains off. Wear gloves and safety glasses while working. And have someone assisting you as you’re working. We have technicians that can make this repair for you.

How to Take Down The Garage Door Opener

To get started, you will need to remove the garage door opener. This is the only way to get the chain off of the unit.

  1. Pull the emergency release cord.
  2. Disconnect the power.
  3. Take the fastener ring off of the arm to disconnect from the trolley.
  4. Remove the clevis pin.
  5. Lower the arms and let them lay against the door.
  6. Take the cover off of the light to get to the safety sensors.
  7. Take a picture of the wires on the safety sensor and the wall control.
  8. Remove the wires from the unit.
  9. Replace the cover.
  10. Take off the locks, washers, and bolts.
  11. Have a helper be available to support the opener when you disconnect it.
  12. Take the fastener ring off of the bracket clevis pin.

How to Remove the Chain

Once you have the opener on the floor, you can tackle removing the chain. Here is what you will need to do:

  1. Take the outer trolley off of the inner trolley.
  2. Take a marker and mark the position of the inner trolley so that you can put it back together the way it was.
  3. Remove the outer nut.
  4. Take out the threaded shaft.
  5. Remove the chain.
  6. Use something to pray away the master link clip-on spring.
  7. Remove the master link bar.
  8. Take out the idler pulley bolt.
  9. Remove the chain from the rail.
  10. Take the threaded shaft off of the chain.
  11. Take the chain and cable assembly off completely.

How to Install the New Chain

Now is the time for you to install the new chain. Here is what you will need to do:

  1. Push 12 inches of the cable through the rail window.
  2. Add grease to the pulley.
  3. Push the idler pulley through the rail window.
  4. Line up the mounting hole.
  5. Replace the pulley bolt and tighten up the nut.
  6. Be sure that the pulley can spin easily once you have tightened the nut.
  7. Re-connect the chain by pushing the pins through the cable link as well as the trolley slot.
  8. Put the clip-on spring on the master link cap.
  9. Use the mark you made earlier to position the inner trolley.
  10. Re-align the chain and cable on the rail.
  11. Connect the trolley onto the shaft that is threaded.
  12. Replace the inner lock washer.
  13. Don’t twist the chain in the process.

Replace the Garage Door Opener

After you have replaced the chain, you will need to replace the garage door opener. Use the instructions on your opener manual to replace the opener. Once you have the opener re-installed, you should test the door to see if it works.

Contact Us To Replace Your Chain

If you need to have the chain replaced and cannot do it on your own, call Neighborhood Garage Door Service of Kansas City, Kansas so that we can handle the problem for you. Our technicians are able to make the replacement quickly and safely. Call us now so we can get someone out to you.

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positive reviews

They sent Doug Fussell out to my house on the day after Christmas! I had only called them three days before! Doug was a premier technician, very thorough and very efficient. I expected him to take two days, since he was replacing two doors and adding openers on each door. He only took the daylight hours of one day! I could not believe how fast he was! In addition, he thoroughly taught me how to use the remote openers. I highly recommend them to anyone!
~Donald B.

positive reviews

We just bought a home and this company was so understanding as I had to change the appointment time a few times. Then the tech came out and was so kind and helpful. I could not have asked for a better experience and will suggest them to anyone who needs work done on their garage door!
~Tammy K.

positive reviews

My garage door broke on a Saturday night as I was getting ready to leave for a holiday party. Kelvin was here within 30 minutes. He reviewed everything with me that was happening with my door. He gave me the estimates of what was immediately needed to be done in order for my door to raise and then what I will need to have done very soon. I could see all the problems he pointed out to me and I decided to have everything done. He completed everything that night. I was very satisfied with Kelvin’s professionalism and the work he did. Thank you again.
~Joyce N

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