Single Hung Window Channel Balance

A quick learner from yountville ca says:
My windows open easy, but very hard to close.
The number on the balance is 27-4-HQ Caldwell.
Are these adjustable or do they need to be replaced?
What is the replacement part?
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Paul from SWISCO responded:
Thanks for posting. I'm afraid these balances cannot be adjusted, so you will need new ones if they're broken. Based on your information, it sounds like you have a 28" block & tackle balance with a stamp option of 2740. I'm afraid that's all I can tell based on your information, though. Now you just need to pick out the top and bottom fittings in order to determine the Series.

I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.
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