Coil sash support for a vinal replacement window purchased from Bradco Supply age 15 years

Hey, Pam. I'm not sure what it is you have, exactly. Please send me a few pictures of the hardware in question and we will try to find a solution for you.

You are correct, this looks like our S180-6 coil spring. To remove your old pivot shoe (which looks like our 15-087) in order to replace the coil spring, first remove the sash. Then remove the top screw holding in the 16-024 mounting bracket. Insert a flat head screw driver into the shoe's cam and turn it up to release the shoe. Raise the shoe all the way to the top of the track.

This is where it might get tricky. Hopefully, the window manufacturer has a cut out to allow the removal of the shoe. If not, you'll have to try to make enough of a cut in the track to remove the shoe. Replace the spring in the shoe, slip it into the track, hook the coil spring and screw on the 16-024 mounting bracket. Now, with the screw driver, bring down the shoe to a height where you can install sash and turn cam towards you to lock it in place. Install the sash and you are done.