Paul from SWISCO responded:
August 5, 2014
This pivot shoe looks like our 15-177. Do you agree? They changed its design since they made the model you have. Instead of hooking in the spring, you now screw it on with a #6 X 3/8" pan head screw, like our 33-071.
Now, there should be a number printed on you coil springs near the end that attaches to the pivot shoe. From the measurements of your sashes, The 32" x 33" would be our S152-6 and the 36" x 45" would require two springs per side, an S152-8 and an S152-9. See our video on coil spring balances. For further information and let me know what you think of my recommendations. |