semco double hung tilt window

A quick learner from Maple Park, IL says:
September 7, 2017
after tilting the window it locks into a blue plastic clip that then alows the window to slid up and down and holds the window in place not allowing it to fall. These are breaking off so window must be supported with a block, etc to stay open.
Can supply any identification that you need. Thank You!
20TG found on track
19!/4" high x 271/4" wide glass
purchased 5/30/1996
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Tom from SWISCO responded:
September 8, 2017
Can you update us with a photo? We want to see the problem you're having, as well as the part you believe to be the culprit.
A quick learner from Maple Park , Il says:
September 11, 2017
Attached are the pictures of an operating window, in which the blue plastic slide is still attached and working correctly in the Semco windows.
User submitted photos of window hardware.
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Paul from SWISCO responded:
September 14, 2017
That blue knife-lock shoe now comes in black. It's our 15-014, used for heavy balance springs. The S751-21 ribbed tilt balance comes with a 15-014 and a (20TG) spring, for a sash weighing between 20-30 pounds. That spring option seems too high for your window sash size, though, so please weigh your sash to be sure.
A quick learner from Maple Park, IL says:
September 22, 2017
The single double hung window weighs 15lbs. Hopefully there are replacement pieces for this weight of window. I have also inclosed pictures of the broken pieces from 1 window.
Thank you
Window hardware
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Paul from SWISCO responded:
September 28, 2017
Your old S751-21 had a spring weight of "20TG," for a sash weight between 20 and 30 pounds. For a 15 pound sash, it is "20R." That is a significant difference. If the sash was performing fine with the "20TG," I would stay with that. We also have "20HD," which covers a sash weight of 17 to 20 pounds. That would be a better choice if you truly want to down-size the spring weight.
A quick learner from Maple Park, IL says:
October 5, 2017
Thank you so much for all your help and the video describing how to install the new parts. Parts are ordered and anxious to get everything installed to have working windows again.
Thanks again.
21" Series 751 Channel Balance
21" Series 751 Channel Balance
S751-21
$10.56
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
VIDEO
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