Bob from SWISCO responded:
May 18, 2020
This looks like a 15-087 Pivot Shoe and 15-086 Tandem Housing. This system uses our Series 180 Coil Springs. For information on removing the system, see the video below. If you're uncertain of what spring weights you need, please confirm the exact weight of the window sash. It looks like you have multiple coils on each side of the sash, so it must be heavier than 4 lbs. Many thanks. |