No markings on hardware of vinyl windows

Question

I had a window that would only go up so much ( see pictures), when I titled it out I saw the coil had broke. I have removed the coil, but now need to replace it. Thanks!

Tom · Accepted Answer

It's hard to make out exactly what you have, but I can spy the 16-024 bracket in your second photo. This is commonly used with the 15-087 pivot shoe, 15-086 top housing, and Series 180 coil spring. Look these parts over and see what you think. The diagram below may also be helpful.

Series 180 coil balance diagram