Simonton double hung window parts

Thanks for your post! I believe you may have on older, discontinued Simonton coil assembly. To replace it, we suggest using the 15-259 Coil Balance Pivot Shoe and the Series 159 Coil Balance. Take a look at the video tutorial below for a detailed explanation on the conversion and the list of parts you'll need for the repair.

There is another video tutorial below with a detailed explanation on how to select the correct coils springs for the assemblies. You may want to consider starting from scratch and weighing the sash to confirm the correct springs.