Help needed

Thanks for posting. This looks like a 15-177 Pivot Shoe, which uses Series 152 Coil Balances. All these components are sold separately. For replacement coil springs, you'll need to choose a spring weight, which designates the strength of each coil spring. Look for stamps on the old coils that indicate this. if there are none or you're unsure, please give me the exact weight of the window sash, and I can work out what you need. 

Sure! We don't have an instructional video on this exact part, but I'll share a couple below that will still be helpful. While the products featured are different, the process of removal is identical as it would be for your application.

Please let me know if we can be of any further assistance. I'm happy to answer any other questions you may have!