Replacement Window Balance/Coil

A quick learner from Charlotte North Carolina says:
My vinyl replacement windows are probably 20 years old but by in large in good shape. I have noticed that when cleaning several of the balance/coil parts have started to break. The metal cylinder component part has broke and the window pin doesn't stay in. I have looked at many sites and can't figure out how to get an equivalent replacement. I need 6-8 to completely refresh all of my windows. As you know the windows still will work without a balance/coil on one side but when you open is when you need it. Can you help me find a replacement? If you so you are my hero!!!
Bill
Thumbnail of the uploaded file named Window Pic #1.jpg
Thumbnail of the uploaded file named Window Pic #2.jpg
A quick learner from Charlotte North Carolina says:
Notice in pic #2 I tried to show you that the weight classification is a "C". I weighed one window sash and it is about 10.5 lbs. Thanks
Bill
Profile picture of Casey
Casey from SWISCO responded:

Hello,

It looks like the cams in your pivot shoe are breaking, which happens when they get old and brittle. Your pivot shoe isn't made anymore but the 15-177 can replace it with no adaptation

If your coil springs are still in good condition they can be reused. If not, you would use two S152-5 coils on each side to support a 10-1/2" pound window sash. Thanks for posting!

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