How To Stretch Garage Door Spring

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.

How to stretch garage door spring.

As you might expect longer springs tend to be used on taller garage doors. With tension completely off extension springs disconnect springs from track support. These will stretch and coil to aid the opening and closing of the door. Durability of the spring.

Thread the cable through the guide hole and then through the spring. 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. Remove c clamps or vice grips and lower door by hand. It does not need to be tight just snug so it does not tangle.

Hold the garage doorin this position by attaching a c clamp to the track at a point below the lowestdoor roller wheel. It 39 s an older style system with essentially a one piece door where the bottom swings out. What could i use to stretch a side mounted garage door spring. The cable then attaches to the hanging bracket at the end of the track.

The spring works by either compressing the spindle or unravelling it to open and close the door. Fasten c clamps or vice grips under bottom rollers to retain door. Knowing the spring s length can help you find the wire size on the chart above. When you get this far you re almost done replacing garage door springs.

Measure 10 coils to the nearest 1 16. This is accomplished by opening the garage door asfully as possible until it hits the stop bolt on thetrack. For a more accurate measurement start at the 1 mark on your ruler. Change the fraction into a decimal and divide by 10.

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. This is true even if you have a garage door opener. 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. This extension spring is used on a seven foot garage door.

Disconnect power and lifting arm of garage door opener. Repeat this process for the other spring.