How To Stretch Garage Door Spring

Thread the cable through the guide hole and then through the spring.

How to stretch garage door spring.

Hold the garage doorin this position by attaching a c clamp to the track at a point below the lowestdoor roller wheel. I 39 m trying to get this garage door opener working for my landlord and i tried maxing out the motor force and it still would just start to close stop and return to the open position. It has a 25 inch relaxed or compressed length and a 42 inch stretched length which is how far the spring should be stretched when the garage door is closed. Remove c clamps or vice grips and lower door by hand.

These will stretch and coil to aid the opening and closing of the door. If you use an extension spring with a different first number you need to adjust your cable length to achieve the necessary 10 percent of stretch when your door is open. When you get this far you re almost done replacing garage door springs. For a more accurate measurement start at the 1 mark on your ruler.

What could i use to stretch a side mounted garage door spring. This extension spring is used on a seven foot garage door. With tension completely off extension springs disconnect springs from track support. As you might expect longer springs tend to be used on taller garage doors.

This is accomplished by opening the garage door asfully as possible until it hits the stop bolt on thetrack. It does not need to be tight just snug so it does not tangle. Knowing the spring s length can help you find the wire size on the chart above. Fasten c clamps or vice grips under bottom rollers to retain door.

The cable then attaches to the hanging bracket at the end of the track. This is true even if you have a garage door opener. Measure 10 coils to the nearest 1 16. Repeat this process for the other spring.

This is the wire size. Durability of the spring. Change the fraction into a decimal and divide by 10. Once your garage door is secured remove the spring hook from the track hanger which will allow you to move the hook and adjust the spring s tension.

If the garage door is being held up extension springs there should be two on each side of the door. To adjust your garage door s side mounted springs first open your door fully and secure it in place with a c clamp below the bottom roller.