How to Install Extension Springs

Before you start working, invite two helpers: one will hold the spring and the other will lift and hold the cable assembly. It is not impossible to do the work on your own, but having someone to help you will let you accomplish the project sooner and with better results.

If you were following our recommendations for removing the old springs, your cable is still threaded. This will make the task easier. You need to connect the spring to the hook at the hanger bracket and then place it up so as to make the spring and the cables meet each other.

Place the clevis on the end of the extension spring and secure the clevis to the pulley. Make sure that the spring is relaxed when the door is in the overhead position. If it is not the case, try changing the position of the hook that holds the cable on the bracket.

Repeat these steps on the other side.

Hot to install the safety cable

Sometimes safety cables are purchased together with the new springs. When the springs break and you do not have a safety cable, your spring often goes flying to another part of the garage.

Slide the cable through the guide hole on the clevis and through the extension spring. The cable should be connected to the hanging bracket at the end of the track. You do not have to make it really tight, just snug.

Now it’s time to test the door. Remove the C-clamps or the locking pliers from the track and close the garage door. Does it close properly? Do you see a gap? A gap may indicate the extension springs do not suit your door. Also, your garage door may just need a little adjusting.

Ensure that the pulleys move properly. The cables should not pop off one or both of the pulleys. If this happens, it may indicate that the cables need to be re-threaded.

How to re-thread the cable

Hopefully, you have made a photo of how the springs were before you removed them, as we recommended in our previous article. You need a helper, who will hold the spring while you are threading it.

To start with, connect the clevis and the pulley to one end of the spring. Tighten the screw you removed earlier using two wrenches. Then connect one end of the spring to the hook on the hanging bracket (most likely, you have had a chance to leave it in place).

Now the helper should hold the spring as close to the place it should be as possible. Do you notice a loop on the end of the cable? It is used to hook the pin on the bottom of the door. Thread the cable to the inside of the pulley that can be seen next to the bracket on the wall (if you cannot see it on your photo, check ours or look at the scheme on the box for the springs).

Pull the cable around the pulley that can be seen at the end of the spring, sliding it through the clevis. Find the hook at the bracket on the overhead track and connect the cable to it. Most likely, you will have to move the hook a bit in order to adjust it.

If you loosened the cable, tighten it up. The spring should be elevated, but relaxed. Now you can install the safety cables (the steps were described several paragraphs above).

Repeat these steps on the other side.

Test the door. Close it and check whether the cables are in place. Do you see a gap? If no, then your work is done.