Window channel balace wood frame double hung

A quick learner from El Segundo, CA says:
November 6, 2018

Hi, have a couple of old double-hung (non-tilt) windows with channel balances that need replacing. The channel balance is marked with 22HD B.S.I. Sash weighs about 16lbs. The sashes are compression types.

The channel balance measures 23.25in long x 9/16 wide x 9/16 deep. The liners do not have any takeout clips, and the frame is wood. Do you have anything which would work for replacement? Even just a replacement spring would do, all that broke is one end of the spring.

Thanks! Ray

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Tom from SWISCO responded:
November 14, 2018

Thanks for posting. Take a look at our S751-23 channel balance. I think this could be what you're looking for. 
23" Series 751 Channel Balance
23" Series 751 Channel Balance
S751-23
$10.98
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
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