SWISCO - The Replacement Hardware Authority

Non-tilt Milgard channel balance

A quick learner from San Diego says:
Hi,

I needed to replace one of the channel balances of my non-tilt window from Lowes (which seems to bear the Milgard emblem). I took the channel balance (1/2" x27") out, the string to the pulley is broken. My questions is, my channel balance looks like Series 380 and 385 as posted on you web, I would like to know:

1. What's the difference between the 15-004 and the 15-005 shoe?

2. Does one usually replace both sides at the same time?

Thanks!

Regards,
-matt
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Paul from SWISCO responded:
Thanks for posting! The difference between the Series 380 and Series 385 channel balances can be found in their shoes. Please take a look at our 15-004 and 15-005 channel balance shoes, and note their depths. As you can see, they are 1-3/32" deep and 1" deep, respectively. Which one more closely matches your own bottom attachment?

As for your second question, I believe that you should replace both. This will ensure that tension will be the same on either side of the sash. Plus, you can always save the old undamaged balance for when another sash balance goes.
A quick learner from San Diego says:
Hi,

I have installed the pair of Series 385 (w/ option 2650) channel balance that I received. The installation is quite simple and the replacement seems to work well except there is noise which seems to be made by the spring within the channel balance when I push the window up or down. The noise seems to be only coming out from one side.

Is there simple adjustment which I can made to resolve this?

Thanks!

Regards,
-matt
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Paul from SWISCO responded:
Thanks for getting back to us, Matt. I think this sound may be a problem with string tension. Your window jamb may not have any way to ease the tension applied to the string knot. This could be an issue; if you keep using this window, the string may snap. Many windows already have a relief hole, but unfortunately a rare few do not.

The quickest and easiest solution at this stage would be for you to drill a hole directly in the jamb where the knot is located to relieve it of the stress. This should work for you.
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