Fix parents broken window
Hi there!
Your pivot bar appears to be an old Simonton brand which leads me to believe this may be a Simonton brand window. If that's the case, I recommend you use our 15-259 pivot shoe and Series 159 coil springs to replace your original setup. We even have a video that will walk you through the installation process. I will also attach another video below that will show you how to remove your hardware from the track using the cut out method.
You could use the 15-192 but this will likely require shaving down the bumps on the face in order for it to fit in the track. Please note, modified items cannot be returned for a refund.
1. No markings on the coils but the window weighs 20.7 lbs, and there are 2 double coils (1 on each side) for a total of 4 coils on the window, which weighted Series 159 Coil Balance Product Code: S159-? do I need as 20.7 divided by 4 is 5.175 so not a perfect match to any coil. I assume I need to replace with a double coil or is it possible to convert to a single coil?
2. Depending on the answers above, the old coil assembly is a double coil, has a white plastic circular holding the metal coil and that center of that plastic goes into a slot that holds the screw into the window. Will a new Series 159 Coil Balance Product Code: S159-? work with the assembly that we already have or will we need a new double assembly? If we need a new double assembly, is 3/4" Coil Double Support Product Code: 15-256 the one? It looks like there is only one screw slot/hole in that one though which concerns me, if not which one is it? OR can I convert to a single coil? and if so 3/4" Coil Single Support Product Code: 15-255.
Current assembly pics attached and measuerments are: The distance between the 2 screws in my current balance assembly is 1-1/2" apart, the width is 1-1/4", depth is 13/16", length is 3-1/16".
Thanks so much!
You can either stick with the original double coil setup or you can switch to a single support; the decision is ultimately yours! If you decide to go with two coils on each side of the window, you can use (1) S159-5 5.5-pound spring and (1) S159-4 4.5-pound spring on both sides of the window. This would total 10 pounds of support on each side for a 20-pound sash.
If you end up going with a single coil on each side, you can use (1) S159-10 10.5-pound spring on each side of the window which would total 21 pounds of overall support. As long as the coil weights are within a pound of your sash's actual weight, either setup should be fine. Your old support isn't compatible with the Series 159 springs so you would need a new one. See the 15-256 for a double coil support and the 15-255 for a single coil support.
Let me know if you have any questions and I'd be happy to help!