On some of my windows, the string has broken or the lock shoe keeps sliding up. I feel a good number of the balance springs should be replaced, since they are almost 20 years old.
However, I couldn't find an exact match on your website. Particularly because of the mounting screw on the top of the metal rail (see attached images).
Could you please provide some expert guidance?
Thank you,
Eduardo
Thanks for contacting us, Eduardo. We may be able to supply this balance, but before we can go any further I just want to make sure we get you the proper size. May I h ave the length, width, and height of the original metal channel?
Looking at your ribbed balance with the locking knife shoe, I believe that you can use our S751-31 with a 30HD stamp option. Now, this balance comes with a similar shoe, 15-014. Since you have the old balance shoe out, please check the distance from the back of the shoe to the tip f the locking fork. Ours is 1-1/8". If yours matches then our Series 751 will work.
Also note that they no longer come with a mounting screw hole at the top. You will need to drill a hole, unfortunately.
Thanks, Eduardo. That different in shoe width actually isn't all that much, at least compared to some instances. Since it's only a difference of 1/8" I think it might be caused by your shoe wearing down from time and use. This happens a lot.
That said, I believe you can use our S751-31 with a 30HD stamp option.
It's usually not necessary to lubricate new balances. If you wanted to, you could spray silicone in the track.
It was my pleasure. If you need anything in the future, you know where to find me.
