window channel balance

A home owner from Dana Point, CA says:
November 13, 2022
Hello, I'm trying to figure out what part to order to replace my window channel balance. The string broke, so if I can just re-weave a new string into there, that would be good to know.

The channel portion is 27" long (just the metal part, not including the plastic end). The stamp on the left side (the one that broke) is "26 4 LU CMC 1". The stamp on the right is "26 4 TU CMC 7".

If I need to order a new channel balance, it is my understanding that I should order two, and replace both sides at the same time.

This is a mid to late 1970's house but I haven't been living here long, so I don't know any history on these windows or their parts. Any help would be greatly appreciated.
Thumbnail of the uploaded file named IMG_2858.jpg
Thumbnail of the uploaded file named IMG_2860.jpg
Thumbnail of the uploaded file named IMG_2857.jpg
Profile picture of Casey
Casey from SWISCO responded:
November 17, 2022

Hello,

We'd be happy to help but we would need to see detailed photos of the fittings attached to both ends of your metal balance channel to compare to our inventory. 

You are also correct that we recommend replacing both balances at the same time so that the sash is equally supported on both sides. We do not recommend trying to replace the pulley cord since these balances are under a lot of tension and can cause injury if they are tampered with. Thank you! 
A home owner from Dana Point, CA says:
January 29, 2023
Hello, I've taken some more photos to help figure this out. Sorry about such a lag time before following up. Any help is greatly appreciated!

The image limit per post is 5, so I'll add some more in a follow-up post.
Thumbnail of the uploaded file named 0AA7C2F3-2AB3-4EF7-B2E4-08E7C820C4A2.jpeg
Thumbnail of the uploaded file named 746CEE63-D289-4930-AA9E-27E54BB1526E.jpeg
Thumbnail of the uploaded file named 66A5A581-4E7E-4B52-B021-2E62B7860269.jpeg
Thumbnail of the uploaded file named 7A170512-5869-40D5-8B8F-D2045AD1D603.jpeg
Thumbnail of the uploaded file named 7EB5899B-0F8C-48E4-A300-419D6104E4E3.jpeg
A home owner from Dana Point, CA says:
January 29, 2023
Here are some more photos of the channel dimensions and ends.
Thumbnail of the uploaded file named DFDF869E-D236-49B5-B86A-8C19E18B1720.jpeg
Thumbnail of the uploaded file named 8535FDCF-2A0A-4B8C-8459-CCE8D52B888B.jpeg
Thumbnail of the uploaded file named 99C9ED32-AF9A-4736-BEDE-A1F0DD099640.jpeg
Thumbnail of the uploaded file named 3B7CCBE9-258D-42C1-80B2-AFD6F8F86D45.jpeg
Thumbnail of the uploaded file named 901E3493-BE42-4628-9E31-AE5B1531173E.jpeg
Profile picture of Casey
Casey from SWISCO responded:
January 30, 2023

Thanks for getting back to us. It looks like you have either our S351-27, with a 15-002 bottom attachment, or S390-27, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2640 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
A home owner from Dana Point, CA says:
January 30, 2023
Thank you so much for the quick reply! It looks like the 1 1/8" S390 should do the trick.
Profile picture of Casey
Casey from SWISCO responded:
January 30, 2023

Great! Please let us know if you need anything else. 
27" Series 351 Channel Balance
27" Series 351 Channel Balance
S351-27
$10.77
27" Series 390 Channel Balance
27" Series 390 Channel Balance
S390-27
$10.55
How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to replace a non-tilt channel balance
How to replace a non-tilt channel balance
GUIDE
READ >
Choosing a Non-tilt Channel Balance: What Will We Need?
Choosing a Non-tilt Channel Balance: What Will We Need?
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.