Tom from SWISCO responded:
September 1, 2017
I'm pretty sure we can help, yes. If the problem is that the window won't stay open, then it's a good bet that the springs are the problem. Based on the pivot shoe and other hardware I see in your picture, I would recommend our Series 180 coil spring. You will need the number off the old spring to confirm the best Series 180 option. See the video below to see how we remove this kind of balance. Your setup is a little different, but the principle is similar. The biggest difference is that your springs are hooked onto a bracket near the top of the track instead of the shoe itself. Refer to the following diagram.
Detail of 15-086
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