Compatible Pivot Bar

A home owner from South Korea says:
Hi,

S161-07 can be used with 26-083 style pivot bar ?

Thumbnail of the uploaded file named PivotBar_26-083_Swisco.PNG
A home owner from South Korea says:
Attach my parts.

Spring in the pivot side is broken.
Code printed at the used springs are :

Tandem Side : 3 11W
Pivot Side : 7 Y

Can I replace broken part with S180-7 ? I'm doubt "7 Y" is printed on the spring (don't know the meaning of 'Y' after 7) ?

Best
Thumbnail of the uploaded file named IMG_4387.JPG
Thumbnail of the uploaded file named IMG_4386.JPG
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Casey from SWISCO responded:

Hello,

Your coil balance assembly actually looks like a closer match to the 15-087 housing pivot, which would use the S180 coil springs, 15-086 tandem housing and 16-024 bracket. The 26-083 has been recommended with this coil balance in the past but you would need to confirm that the specifications below match up to yours. Thank you! 

Detail of 15-087
Detail of 15-087

Series 180 coil balance diagram
Series 180 coil balance diagram

Detail of 26-083
Detail of 26-083

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