Window balance broke

Handy Person from 94706
I was wondering if you could help determine the replacement parts I needed. I don't know how many lbs the old window balance was. And if you have an install guide you can send me.This is for the left side of the window. Window is 27 inches wide and 41 inches high.
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Jasmine
Jasmine from SWISCO
SWISCO
Expert

Thanks for reaching out to us! The nylon piece pictured here is the 15-102 Double Side Load Carrier. This is used along with the Series 145 Coil Balance. To determine the springs needed to complete your assembly, you'll need to look for any stamps on the metal. I'm sorry to say we do not have a guide on how to install this assembly.

If there are none, you'll need to obtain the exact weight of the sash and divide that number by the total number coils in the window; in your case, four. 

Alternate view of 15-102
Alternate view of 15-102

Alternate view of 15-102
Alternate view of 15-102

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