Bob from SWISCO responded:
January 7, 2020
Thanks for writing in. This looks like the housing for a Coil Balance assembly. I am quite confident that we can replace this assembly for you, but we need more information to be able to help. At the bottom of this coil balance assembly, there should be what is called a pivot shoe; a plastic piece with a metal cam from which the window sash can pivot inward for cleaning. Can you remove this pivot shoe from the window and show it to us? The identity of the pivot shoe determines the identity of the coil balances needed. From there, we'll do our best to find what you need. Many thanks. |
Bob from SWISCO responded:
January 10, 2020
I am afraid not. We can't see neither the coil spring or the pivot shoe at all. We will need for you to remove it out of the window and forward us over a couple of photos for us to review. If there happens to be a stamping or marking on the coil spring itself once it's removed, please get back to us with that information as well. |
Bob from SWISCO responded:
March 10, 2020
OK perfect. This looks like our 15-111 Pivot Shoe. This shoe uses either our Series 160 1/2" Thick Coil Springs or our Series 165 3/8" Thick Coil Springs. Compare both with your old springs to see what you need. If you're uncertain what spring weights you need, give us the exact weight of your window sash, and we'll work out what you need. |
Bob from SWISCO responded:
March 11, 2020
|
Paul from SWISCO responded:
March 16, 2020
Perhaps I can be of assistance. The white nylon piece you show in the first photo was an older version of this coil spring's cover that the manufacturer discontinued. It was replaced with the 15-150S. The function for this nylon piece is to cover the coil spring. It doesn't have any function in the operation of the sash. The coil spring Series 160 and the pivot shoe 15-111 does the operation of the window sash. Let me know if you have any further inquiries. |
Paul from SWISCO responded:
May 18, 2020
Without knowing the exact weight of the window sash, or the stamp codes on the springs, I unfortunately can't say what spring weights you need. They need to be equal on both sides of the sash and equal to the overall sash weight. |
Bob from SWISCO responded:
May 25, 2020
You always want the balances you use for your window to be calibrated to support an overall weight as close as possible to the window sash's exact weight. Too low a weight will cause the window to have trouble staying open; but also, too strong a weight will cause the sash to drift open and be difficult to close. In either case, the balances are sure to break down much more quickly than they would otherwise. This is why obtaining that exact weight is important if the coil springs have no stamps. If you're having a lot of trouble getting the sash out again to weigh it, you can place your scale on the windowsill and gently lower the sash onto the scale. This isn't as ideal, but if you're careful you still should be able to get a good measurement. For clarity on removing and replacing these coil balances, see the video below. |