Do I need to replace the springs or the shoes?
Thanks for reaching out! It appears your coil balance shoes are completely broken, so they'll need to be replaced. Although, we do not carry an exact replacement for you existing shoe. With that said, we have two possible replacement options that could potentially work for you.
For this, we typically recommend our 15-192 Certainteed pivot shoe to replace your Simonton brand part but you may need to shave down the aligners from the shoe to install it into the window. Take a look at the dimensions to confirm if it may work for you.
If your coil springs are still in working condition, you should be able to use them with the 15-192 pivot shoe. This shoe is compatible with the Series 170 coil balances as well as the Series 171. The S171 is stacked on top of the S170 in situations where there is more than one coil.
To confirm which coil strength you need, you'll need to look for any stamps/markings on the metal coil. If there are no stamps/markings, you'll need to get the window weight and divide it by the total number of coils in the window. The compatible cover is part 15-156 and the balance drum part 15-157.
Also keep in mind, you'll likely need to change the pivot bar as well.
The second option is a newer assembly that we are now recommending; the 15-259 pivot shoe. This should fit well in the track, along with the Series 159 coils springs and either the 15-255 single support or the 15-256 double support. To use this assembly, the original pivot bars would need to be replaced with our 26-083.
Be sure to carefully review all of the information to confirm which of these assemblies might be the best solution for your window.