Single Coil Balance

Question

Hi folks,
This coil is out of a series 1255 window. The coil is stamped with 902 or 9C2. No notable markings otherwise.
Thanks in advance.

Bob · Accepted Answer

Hello there. This looks like a 15-180 Pivot Shoe, which works with Series 190 Coil Balance springs. I suspect the spring might be stamped '932'. In that case, you could use the S190-940 9 pound spring. If you want to be safe, weigh the window sash these coil springs support. Give me that exact weight, and I can calculate the spring weights you need. For new coil covers, see the 15-186 Housing and 15-182 drum.