Window coil spring replacements
Handy Person from Orange CA
Sep 23, 2025 11:23 am
The intact coil assembly has 7R stamped on the case. The broken assembly does not have any marks. The bottom metal pins have the number 4 on them. I want to replace both coils and both broken metal pins
3 user uploaded images
4 Replies
Jasmine from SWISCO
Sep 24, 2025 4:20 pm
The assembly you'll need to replace your existing coil balances is the S140-07 Quick-Tilt assembly. This is available in a right and left option. To confirm that this will be a fit, be sure to compare the dimensions.
The pivot bar can be replaced with either the 26-398 or the 26-405. You'll need to compare their dimensions (on the website) to an undamaged pivot bar to determine which of them is the correct replacement.
Alternate image for S140-7
Handy Person from Orange CA
Sep 24, 2025 4:33 pm
I ordered the 10lb version. The window weighs 5lbs more then the recommended max weight for the 7lb springs. Which is probably why the original spring fatigued and broke :/
Jasmine from SWISCO
Sep 25, 2025 8:33 am
If you have not weighed the sash, then it would be suggested to confirm the exact sash weight. The 10lb assemblies will support a sash weighing 20lbs.
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