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Casey from SWISCO responded:
April 15, 2020
Hello, Based on what I can see of your hardware, I suspect your window uses our 15-087 coil housing and S180 Roller-Tilt coil springs, which install using the 16-024 mounting bracket. There should be stamps at the end of your metal coils that will tell you what options to choose on our website. Also, see the diagram below demonstrating how these parts should install. I'd recommend looking at another window with hardware that is still in good condition to confirm my recommendations. Thank you! 
Series 180 coil balance diagram
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Casey from SWISCO responded:
April 24, 2020
Great. You'll need to remove the hardware to compare the dimensions to the parts I recommended in my previous message. Make sure to take note of the stamps at the end of the coils that you tend to replace since that will tell you how much tension they require to keep the sash raised. Thank you! |
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Casey from SWISCO responded:
May 27, 2020
If the pivot shoe is not broken, you can reuse it with the new S180 coil springs. If you could show us a picture of your pivot bar, we should be able to confirm if the 15-087 pivot shoe is compatible. The S180 coil springs will have a spring code stamped on them that indicate the amount of weight that each coil supports. The smaller window will use the same parts but it might have a lighter spring number. |
