How to Adjust the Extension Springs on Garage Doors
A garage door that uses extension springs to lift the door will need adjustments more regularly than a torsion spring door. A cable attaches to the bottom of each side of the door and loops through a pulley on each extension spring. The other end of the cable is tied to a cable clip with an s-hook attaching the clip to the upper track. There are several adjustment holes in the upper track that you can move the s-hook to and adjust the springs.
garage door spring types