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A quick learner from Winston Salem, NC says:
February 26, 2018
Based on the attached photos, I think I am looking at part numbers 15-180 and 15-186. Please confirm if you agree. If that is the case, here is my follow up question: your website says I should use a series 190 coil, but I have no clue which coil I should use. The windows are fairly heavy. I have enclosed a photo of the whole window for your guidance.

Is this a DIY fix? Your youtube videos make it seem easy, but I'm not sure how the coil attaches to the shoe. Thanks so much.
Coil assembly
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Paul from SWISCO responded:
March 1, 2018
Thanks for posting! The two parts you picked out look good. For the coil spring, see our Series 190 balance. These are just screwed onto the pivot shoe. As long as you follow the instructions in our video you should be okay. Keep in mind you will also need the number off the old spring to choose the best Series 190 option.
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
Coil Balance Clip
Coil Balance Clip
15-186
$5.05
Balance Bushing
Balance Bushing
15-182
$1.80
How to replace a window coil balance
How to replace a window coil balance
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
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