I have previously ordered window parts from Swisco over the past years.My window sash weighs 18.37 lbs approx. & has a
S160-9 coil balance spring with the
15-111 pivot shoe &
15-150S single support installed with it. Because the springs have broke previously can I install a 10 LB. coil spring instead of the 9 LB.
S160-9. If so what are the part numbers for that coil balance spring & the corresponding pivot shoe & single support, Thank You.