Bob from SWISCO responded:
May 30, 2019
Thanks for posting. See our 15-192 Pivot Shoe. This is compatible with Series 170 and Series 171 Coil Springs. The Series 171 has a longer tongue and is meant to stack on top of the Series 170 if you have more than 1 coil balance on each side of the sash. As far as the stamp codes, it's best to always go by what's on the actual coil spring rather than the shoe or housing. The stamp 408 indicates you might need our S170-408 8 lb spring. But check the second spring for a different stamp. If in doubt, weigh the window sash. Get back to us with the exact sash weight and we will tell you what you need. Many thanks. |
Bob from SWISCO responded:
May 31, 2019
If your springs are undamaged then you'd be fine just replacing the pivot shoe. I would not recommend attempting to convert to the Series 140 system. This is often tempting since it's a "one-all" package, but it has a different thickness than the 15-192 and likely would not sit right in your jamb track. As a rule, it's almost always best to stick with the coil balance system components you originally had. The 15-192 should work for you. |