Double hung vinyl window parts replacement

A quick learner from Newmarket, Canada says:
I have two bathroom windows that will no longer slide, so I guess I need both the parts that go in the frame (x8) and the replacement metal posts that go in the window glass frames that slide as well. I think your service for me to be able to email photos is terrific. I hope you can help me find replacement parts. The install videos on your site are great too.

User submitted photos of a window balance.
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Paul from SWISCO responded:
Sure, I think we can help. See our 15-175 pivot shoe, 26-226 pivot bar, and Series 152 coil spring. Let me know how well this hardware matches your existing parts.
A quick learner from Newmarket Ontario says:
Hi Paul,
I do not know what weight rating coil balance to get.
Is the weight written anywhere on the parts or the window?

Attached is an image of one of the windows.
The windows are roughly 35 or 36 inches square.

Thank you


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Paul from SWISCO responded:
There should be a stamp on the old springs you can use as a reference. If not, let me know the weight of the sash, as well as how many springs are used on each side.
A quick learner from Newmarket Ontario says:
The Sash weight is aprox 13.6lbs., there is one spring on each side of the sash.
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Tom from SWISCO responded:
In that case, I'd recommend our S152-7. Each of these can carry 7 pounds, so two working together can carry a 14 pound sash.
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