Picking The Right Spring For An Overhead Door ?


Old 08-01-20, 04:01 AM
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Picking The Right Spring For An Overhead Door ?

Hi Folks.
Great Forums and folks.

Have a typical garage door (overhead) in my house which is
a Colonial. Two garages.

I have a broken lift spring in one, and need to order a replacement.
I can understand the importance of having the two springs "matched".

No paint color or other ID on any of the 3 functional springs.

So, how do i determine what to buy, please ?

If I "mic" the spring diameter, would this give me (all) the info I need ?

Any suggestions would be most appreciated.

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Old 08-01-20, 04:31 AM
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Do you have extension springs (stretch parallel to overhead tracks) or torsional springs (located on a bar on inside of garage above door opening that rotate)?
Old 08-01-20, 06:01 PM
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You replace both springs because one has thousands of pulls on it and the other has none. Must be done in pairs.

Had a client replace only one spring, the first time he operated the door, the spring broke, severed the electrical and if he had been standing there would have taken off his head. Springs are based on the weight of the door. You can release both springs and lower the door onto a bathroom scale and see how much it weighs. (if a smaller door). otherwise, note if it is aluminum, wood, insulated, what width and try to figure it out. Investigate closely, there should be some residual color at one end of the spring to give you guidance.
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