window frame balancers need to be replaced

A quick learner from New Jersey says:
August 2, 2021
silverline double hung windows
i need the primary and secondary balancer and the balance foam plug.
not sure if i need to replace the coil, they are still there.
the sash weighs 10.8 pounds if i need new coils.
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Bob from SWISCO responded:
August 5, 2021

This looks like a 15-087 Pivot Shoe, which uses Series 180 Coil Balances. If the springs are undamaged you could reuse them; however if the window fails to open or stay open the springs likely are damaged and should be replaced. For a window that weighs 10.8 pounds, use two of the S180-5 5 pound springs, one for either side of the sash. That will equal 10 pounds of total support (being within 1 pound of the exact sash weight is sufficient). See how these components come together below. I am afraid we do not carry the dust plug you refer to. Apologies for any inconvenience. 

Series 180 coil balance diagram
Series 180 coil balance diagram
Coil Housing Pivot
Coil Housing Pivot
15-087
$5.97
Mounting Bracket
Mounting Bracket
16-024
$0.66
5 lbs Series 180 Coil Balance
5 lbs Series 180 Coil Balance
S180-05
$4.37
How to remove window pivot shoes
How to remove window pivot shoes
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Anatomy of a tilt window
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How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
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Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
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