Coil balance parts

Hello,

I'd recommend the 15-177 pivot shoe and Series 152 coil spring. These work a little differently than your original springs. The S152 screws to the shoe instead of hooking onto it but it should still work as a replacement. To figure out which strength options you'll need, check the old spring for a stamp number. 

Alternate image for 15-177

I would also recommend looking over the 26-030 pivot bar commonly used with this pivot shoe to see how the backset of the installation holes compare to yours. Thank you! 

Detail of 26-030

Alternate view of 26-030

If there is no stamp on the original coils, you'll need to weigh the window sash and divide the weight by the number of coils used on both sides of the window. That will confirm the strength options needed for your replacement coils.