Sliding window balance spring ID

A quick learner from Redlands, Ca says:

Hello,

There is a patent # 5353,548 written on the plastic case. The design is similar to the series 140 but not identical. I could not find a name of the manufacturer only a logo.

Thanks for your help.

Peter

Thumbnail of the uploaded file named Window mfg logoDippell.jpg
Thumbnail of the uploaded file named Balance springDippell.jpg
Profile picture of Tom
Tom from SWISCO responded:

I don't believe that the Series 140 will work for you. Your pivot shoe looks more like our 15-087, which uses our Series 180 coil spring. You'll need the stamp off the old springs to confirm the best Series 180 option. Otherwise, I'm confident that this hardware is a better match. Look these parts over and let me know what you think!

A quick learner from Redlands, Ca says:

Hello,

I removed the spring and see that it is marked CMC 205 35" 7#. From this I think that I need a spring 35"long with a 7lb rating. Is the S 180-7 the spring that I need along with 15-087 coil housing pivot? (one each per side, two sets per window)

I watched the replacement video, and it suggests that I use two spreaders or cut the frame. My frames are aluminum, so I don't think that the spreaders will work. My only option in that case is to cut the frame or remove the window. Are these options my only choice?

Thanks,

Peter

Thumbnail of the uploaded file named springdippell.jpg
Profile picture of Tom
Tom from SWISCO responded:

Hello again! Yes, if your old spring is marked with "7" then the S180-7 is absolutely what you want. 

If your frames are aluminum and if you have no pre-existing cutout, then making the cutout yourself is your only option, yes. Our spreaders unfortunately will not work for aluminum windows.

How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.