Multiple windows with bad balancers

A contractor from Rhode Island says:
March 22, 2011
I have multiple windows with bad balancers they are 28" long, 9/16"deep, 1 1/4" wide, they are of the flat channel type with 2 spiral balancers located inside the channel
user submitted photo of window balance
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Paul from SWISCO responded:
March 23, 2011
Thank you for submitting your photos.

It appears you will need the Swisco Series 600, 28" Spiral Balance. If you need to replace your pivot shoes, it seems as if the 15-047 Pivot Shoe would make a good replacement.
A contractor from Rhode Island says:
March 23, 2011
Im assuming this means the channel needs to be taken apart and these particular balances should somehow be mounted inside ?
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Paul from SWISCO responded:
March 30, 2011
Yes, you should be able to remove the balance covers, replace your spiral balances, and then reinstall the covers.
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