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Jasmine from SWISCO responded:
August 25, 2023
Hey there, Thanks for writing in! Your coil balance housing looks similar to our 15-087 coil housing pivot as well as the 15-086 tandem coil. Carefully review and compare the dimensions to those shown below to determine if this is the correct replacement. I am confident these are the replacement you'll need. 
Detail of 15-087
Detail of 15-086
The coil housing pivot is compatible with the Series 180 coil balance springs. Although, I am unable to tell the exact coils you need. The bottom coil would clearly be the S180-8, however, I am uncertain if the other is a 6 or a 9. To determine which of these you need, I would suggest obtain the exact weight of your sash. If your sash weighs 28lbs, I would suggest using (2) S180-7, these are 7lb coils. However, if your sash weighs 34lbs, you will need both the S180-8 and the S180-9. I'm willing to bet it is likely the latter but I would recommend double checking the sash weight to be sure. Your pivot bar looks a lot like our 26-422. Again, carefully compare the dimensions to confirm that this is the right replacement. 
Alternate image for 26-422
The metal mounting bracket that secures the coil in the window channel is part 16-024. For an idea on how to remove/install these balance assemblies, take a look at the video below from our Swisco YouTube channel. |
