SWISCO - The Replacement Hardware Authority

Single hung window won't stay open

A home owner from San Diego, California says:
Hello - We have TWO 1986 era single hung windows that are hard and heavy to lift up and will not stay open w/o a stick to prop them up.

I have measurements and pictures to help find the right replacement parts:

The bottom sash size is 2'6" height and 2'9.5" wide.
Window frame measures 4'11" height and 2'11" wide.
The number stamped on the metal channel is 2640.

Attached is a picture of top plastic guide (DSC06257).

Attached also are two pictures of the channel and rollers (DSC06256 & DSC06255.

The length of metal channel is 27 inches (not including plastic guides in the measurement).

Thank you for your help!
Lillian

A user submited photo of window channel balance
A customer submitted photo of channel balance attachments.
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Paul from SWISCO responded:
Thanks for posting, Lillian! First thing's first: please look at our 18-008 top sash guide. This looks very similar to your own hardware. Make sure to compare the dimensions of the two and see if you think it'll work.

Now, for your channel balance. I can't quite recognize what you have based on the pictures provided. Can I see a clear picture of both ends of the balance? Also, were there plastic attachments at either end? If so, can I see pictures of them as well? If not, can I see whatever clips, shoes, or brackets may have been attached?
A home owner from San Diego, California says:
Hi again - Sorry it took so long to get the pictures of the window channel balance and ends.
The 5/8" Top Sash Guide is 18-008 is the same.
The windows are Millguard cerca 1986 if this helps.
I attached several pictures and thankyou for your help.
Lillian
A customer submitted photo of channel balance attachments.
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Paul from SWISCO responded:
Thank you, Lillian. That helps a lot! But before I can suggest an applicable replacement for your balance, I'll need your help in identifying the appropriate bottom shoe to use. Please look at our 15-001 and 15-002 and note their depths. As you can see, they are 1-1/8" deep and 1" deep, respectively. Which one more closely resembles your own shoe? This will help us determine your balance Series, and we can work from there!
A home owner from San Diego, California says:
The dimension matches 15-001 at 1-1/8" deep.
Please note: We have 2 identical windows in the same room and both have the same problem.

Thank you
Lillian
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Paul from SWISCO responded:
Thank you! That is all the information that we need. Please take a look at our S390-27 channel balance with a 2640 stamp option. Do you think this would work for you? Let me know!
A home owner from San Diego, California says:
Its looks like what we have so I will order 4 S390-27 - is this all I need to order to replace the balances and get the windows opening easy again?

PS - Do you have any tips on how to do the replacement?

Thanks for all your help/advice .
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Paul from SWISCO responded:
Usually, the balance is all you need, however there may be other parts that aren't operating as well as they could. Take a quick look around your window sash and see if anything else may look worn or damaged.

As for tips, we actually have a tutorial video on how to install this very balance type. This should also give you a good idea of what other parts to look for that might need replacing.
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