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Will I have any garage door issues if I use 30 inch springs?

One of my springs broke. It still had the home depot label p730c…its an extension spring.

The spring on the other side is older (a lot older) and 2 inches longer when laid side by side.

The garage door is 7 foot tall (8ft wide). and i am planning on replacing both springs now.

My neighbors springs are 28 inches, and he says I should use p728c or 28 inches. I want to use the 30 inches.

Hooking them up looks real easy. I had S hooks,l but the new springs come with bent V looking hooks with a bar across it.

Anyone have any experience?

Update:

thanks Sandy -

the 2x4 was a good idea to keep it safe.

my garage door opener has a string hanging in the middle of the track.....if the rope pulls the lever to the down position, then the opener unlocks, and i can open & close the garage door manually.

if i pull the lever back to the up position, then the track locks the garage door. so i was able to use the lever to keep the garage door open. i also wedged it open to keep it safe (my other idea was a ladder, but my short ladder would require boxes stacked precariously on top)

2 Answers

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  • 8 years ago
    Favorite Answer

    You are correct to change both springs. It keeps the door in balance as well as easier to adjust.

    Wether you use 28" or 30" springs will affect the adjustments.

    There are two adjustment points for door springs, top and bottom and will affect the ease of operation.

    The "V" connector is usually for springs in pairs, however since the new springs will have a safety cable, its a convenient place to attach.

    A correctly balanced door should set stable at chest height.

  • 8 years ago

    Most doors do take a P728c, but there are also many that take P703C. Don't go any longer than that and you should replace all of them at once. The only difference between the ones with the Clip, and the ones with the S hook is that. The way it goes on to the hardware set. either S or Clip. Push the door all the way open and prop it up using 2 x 4 's. I hear that makes it easier to put on. Also spray them once in awhile with WD40 to keep them from breaking.

    Source(s): Hardware/Tool Store Manager 35 years
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