MW (now PlyGem) Window Parts

We should be able to help, but we can only supply a completely new balance. Your original balances haven't been made in a long time and you pretty much need to replace the whole assembly with a modern version.

Before I recommend anything, though, I'd like a clear picture of the bottom end of your balance. I think I know what you have but given the circumstances I want to be 100% sure. I'd also like to know the diameter of the spring.

Thank you. I believe you can use our 1/2" wide Series 795 plain channel balance as a replacement for your original. However, the method of replacement is somewhat involved. I highly recommend watching the video below, which should cover everything you need to get the new style balance working in your window.