Window Balance Replacement

A handy person from Conecticut says:
March 21, 2023
I have a 30 inch long broken window balance for double hung, tilt windows. The internal string broke inside the balances. The stamp is 29HD MM BSI as shown in the picture. Can you help me identify the proper replacement balances?

Can you also help me identify a compatible pivot shoe replacement based on the included picture?

Thank you for your help.
Thumbnail of the uploaded file named 29HD BSI
Thumbnail of the uploaded file named IMG_2907.jpg
Thumbnail of the uploaded file named IMG_2908.jpg
Profile picture of Casey
Casey from SWISCO responded:
March 22, 2023

Hello,

I would recommend removing an undamaged balance assembly from the window to compare to the 30" long S770-30. You will also need to weigh your window sash to determine which option you'll need for your replacement balances since your stamp code differs from ours. There is a chart on the balance product page that explains how to choose your option based on the sash weight. 

You will also need to confirm if the dimensions of the 15-167 shown below match up to your part. Thanks for posting! 

Alternate image for 15-167
Alternate image for 15-167
Pivot Lock Shoe
Pivot Lock Shoe
15-167
$2.57
30" Series 770 Balance
30" Series 770 Balance
S770-30
$12.80
How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
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 >
How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
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WATCH >
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