Hi, I need to replace this part in my sash window, the coil has broken down and window won't stay open. Also I don't see a cutout on my window to remove and replace balance spring so how do I do that? Thank you.
The shoe is stamped 550 PAT#5,704,165.
Coil spring is 1/2" wide.
The coil close to the shoe is stamped with number 6 or it could be 9.
Thank you.