Coil balances

A quick learner from Omaha ne says:
November 12, 2023
Trying to figure out which coil balance pieces to order. The only marking I see on the coil itself is "406"

Can you suggest some parts to try? I have a bunch of these that have failed on my house, these were installed in about 2005?simonton windows - various sizes.

Appreciate the the help!
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Bob from SWISCO responded:
November 12, 2023

Thanks for posting. I am afraid this Simonton coil balance system is no longer made. We've devised a substitute solution. See our 15-259 Pivot Shoe. This shoe uses Series 159 Coil Balances. We have a video that explains this entire conversion process. Check it out below. To know what spring weights to select for the replacement coils, give me the exact weight of your window sash, and I can work it out for you.
A quick learner from Omaha ne says:
November 12, 2023
Great! The window sash is 19 lbs
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Bob from SWISCO responded:
November 12, 2023

That's perfect, thanks. If the sash weighs 19 pounds, you can use the S159-9 9.5 pound coil spring, one for each side of the sash. That will total 19 pounds of support overall. Since you're going to be just using one coil per side, you can use the 15-255 Single Support. Follow the instructions in the video for further details, and let me know if you have any other questions or concerns. 
A quick learner says:
November 13, 2023
Perfect...thank you for your help, i have ordered the parts you suggested!
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Bob from SWISCO responded:
November 13, 2023

Great, thanks for the purchase! It means a lot.

Please feel free to reach out if you had any other questions, and I would be happy to advise.
Coil Balance Pivot Shoe
Coil Balance Pivot Shoe
15-259
$2.57
9.5 lbs Series 159 Coil Balance
9.5 lbs Series 159 Coil Balance
S159-09
$6.27
3/4" Coil Single Support
3/4" Coil Single Support
15-255
$1.09
How to replace a Simonton coil balance
How to replace a Simonton coil balance
VIDEO
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How to remove window pivot shoes
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Replacing the Simonton Coil Balance
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