Missing part for my window balances

Home Owner from Charlotte NC

May 4, 2020 4:12 pm

Hello. House in subdiv circa 1997. All windows only bottom section opens. One window doesn't budge without great force. See img 1437 example of working window and img 1508 missing part. Don't understand how situation came to be re prior owners, but want to install missing piece on both sides of track if available. What dimensional info do you need should you have a replacement?

Thank you,
Formerly from So Jersey

2 user uploaded images

6 Replies

Tom from SWISCO

May 7, 2020 11:23 am

It looks like you have two windows with two different balance systems. I'm not sure what exactly is missing from either, both appear to have everything needed to function. The first photo matches our Series 775 channel balance and the second photo matches our Series 770 channel balance. Would replacing the balances fix your window? If not, can you specify what exactly is missing?

Home Owner from Charlotte NC

May 7, 2020 2:34 pm

Thanks for responding, Tom. My error in assuming something missing and maybe not all windows had same parts although stylistically the same. In working with it, the window in left pic doesn't stay up although it now opens more easily. So is it the channel balances that need replacing? The shroud (?) measures 35" and there's "35C" embossed in it. Looks like wire broke at bottom at shoe on one of them. I may have done that after unscrewing at top. Glad to replace the set once figure out how to get shoe out and then back in. Please advise and I'll order. Thank you. Cheaper than new window!

Tom from SWISCO

May 8, 2020 7:52 am

Thanks for clarifying! If the window doesn't stay up, then it's definitely time for a new balance. Balances break in many different ways but sometimes the springs just get weaker with age and use. That's probably the situation you're in now. As long as you replace both sides at the same time then your windows should be working normally again.

As for the pivot shoe in the right picture, assuming that's a Series 770 (and I'm confident that it is) then you should consider our 15-129. This is a very common pairing with that balance. I would just make sure our dimensions match yours to be 100% sure.

Home Owner from Charlotte NC

May 8, 2020 10:30 am

We're almost there, Tom. Ordering pair of 35C with 1 1/4 wedge. I had cracked the LH tilt latch after unscrewing the balance spring and it recoiled. Don't see where it matches one of yours. It's 2" exact from screw to screw and has lock screw. Raised "525" on the back. Overall 3" x 1 1/8 measured from bottom. Can you advise? Thanks

Tom from SWISCO

May 8, 2020 11:03 am

I'm not sure what that might be. These windows all use generic hardware so there's a big pool to pick from. I can tell you that we only have one tilt latch set with a 2" hole center spacing and a 1-1/8" width, which is our 26-337. Could this work for you? Make sure to go over our other dimensions to be certain everything is in alignment. Length doesn't matter so much, I'm mostly concerned about hole placement.