Need a whole balance assembly

Question

The balance pictured is the one that came out of the window. The only markings I could find are "15," and "13," on the upper and lower coil covers respectively. I did order a couple of the s140 balances and they fit dimensionally, but two 8-pound balances are too weak for this window. I believe a 3 coil balance would fit, but I'm just trying to make sure I get the right part this time. Your help and time is greatly appreciated!

Thanks,

Brian.

Tom · Accepted Answer

It looks like you have our 15-177 pivot shoe, which is compatible with our Series 152 spring. Since you have a "6" printed on your old spring, you'll want our S152-6. These can carry 6 pounds each, so assuming you have four holding up your sash then it's probably around 24 pounds.