Looking for right coil balance

Quick Learner from Oak Park, IL

Sep 20, 2020 2:07 am

Hey there,

I have a single coil balance in my window. You can't exactly tell in the photo, but the coil actually snapped and the casing is broken. The one you see in the window is the right side coil which is not broken. Can I just replace this with the S140? Thanks!

3 user uploaded images

6 Replies

Quick Learner from Oak Park, IL

Sep 20, 2020 2:23 am

I just noticed in taking the picture for this post, that the right side coil has an '8' on it (and is not broken), while the broken one has a '5' on it...perhaps that has something to do with why it's broken...

Bob from SWISCO

Sep 24, 2020 12:54 pm

This doesn't look like the Series 140. This looks more like an 15-177 Pivot Shoe, which uses our Series 152 Coil Balances. You'll need to look for stamps on each spring to figure out what spring weights you need. If you're unsure, give us the exact weight of the window sash, and we'd be happy to work it out for you.

Quick Learner from Oak Park, IL

Sep 26, 2020 3:38 pm

Thanks Bob! I just weighed the sash, and it looks like it's 17lbs.

Quick Learner from Oak Park, IL

Sep 26, 2020 3:48 pm

And don't I also need a cover that screws into the window track (i.e. picture 3)? Question: When connecting the coil balance to the pivot shoe, it looks like I'm going to need to use plyers or something to bend the coil on the end to hook into the shoe (i.e. picture 1)?

Tom from SWISCO

Sep 28, 2020 10:34 am

17 pounds is a bit of an awkward weight, since you have to divide that by half to get the right strength rating for each spring. In your case, you can go with the 9 pound S152-9. 18 pounds of support should be fine, you probably won't notice that extra pound.

You shouldn't need pliers to install the coil, but if that makes it easier for you then that's the way to go. I usually just pull it back by hand.