How To Replace An Extension Spring On A Garage Door

Open the garage door to remove all spring tension and clamp it in place.

How to replace an extension spring on a garage door.

On one piece doors with side springs you open the door to relieve the spring tension and simply swap out the springs on the opener arm mechanism. Do not try to remove the extension spring that is not broken when the garage door is closed. The easiest way to do this is to take the broken spring to a local garage door dealer or home improvement center so they can help you find an exact match. Purchase new garage door extension springs.

As a side note you should replace both springs at the same time because your garage door won t close properly if one spring has more tension than the other. Once in place disconnect the. Since extension springs are determined by how much weight they each lift and the pulley system cuts this in half you need to replace your old springs with 200 pound extension springs. At the far end of the door rail remove the spring end from its mounting pin.

Disengage the broken extension spring one end at a time. At this point you can place the safety cable clip onto the end of the new extension spring. Thread the safety cable through the spring and tie it to the vertical bracket. The new spring s diameter length and wire size or gauge must be the same as your old spring.

There are no cables or pulleys to deal with and the springs have internal safety rods.