Need help identifying parts to order.

A home owner from Easley, SC says:
October 18, 2022
Above are pictures of the two parts in my window. I need help choosing what to purchase. The window weighs 18 pounds and it's a single hung window. The top part has two coil springs in it. There are no marking on the window. I need both the left and right parts.

When I try to remove the parts, they have become so brittle that they crumble.
Thumbnail of the uploaded file named E5FEAB20-BFD3-409D-87A8-C3D44C209790.jpeg
Thumbnail of the uploaded file named E84F06B6-68DD-4B9C-9446-75CE505A53B8.jpeg
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Tom from SWISCO responded:
October 24, 2022

Looks like you need a new coil balance assembly. We sell the individual components of what you show here; see our 15-111 pivot shoe, 1/2" thick S160-4 coil spring (4.5 pounds of support each), and 15-150D double spring support.

Your next step should be to measure the width of your existing spring to verify that it's the same at 1/2". As long as it is then I feel confident these products can work for you.

Alternate image for 15-111
Alternate image for 15-111

Detail of 15-150D
Detail of 15-150D

Profile view of 15-150D
Profile view of 15-150D
Pivot Shoe, 1/2" Thick
Pivot Shoe, 1/2" Thick
15-111
$2.44
1/2" Coil Double Support
1/2" Coil Double Support
15-150D
$1.57
4.5 lbs Series 160 Coil Balance
4.5 lbs Series 160 Coil Balance
S160-04
$4.50
How to replace a window coil balance
How to replace a window coil balance
VIDEO
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How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
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How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
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Anatomy of a tilt window
Anatomy of a tilt window
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Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
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