Replaced spring but they are to weak and the window does not stay open.

Hi there!

This appears to be an older version of the Series 770 channel balance. Take a look and see what you think. You may also want to weigh your sash on a scale to determine the appropriate spring strength option. There's a chart on the S770 product page that will tell you what option you'll need based on the weight of your sash. 

If you need a new pivot shoe, we'll need to see yours removed from the window along with the written out thickness and width dimensions. 

This is an old style balance that hasn't been made in decades and I cannot tell if your pivot shoe is in good shape or not so I really don't know if you need a new one. If it is in good condition, you can re-use it but if it's not I will need to see it removed from the track along with the requested dimensions. That is the only way for me to offer a confident recommendation. 

The Series 795 will not work as a replacement, no. If your balance's metal channel is 10", this will have to be a custom order since that length is not a stock option of ours. With that said, I would need to see a clearer picture of the stamp on your metal channel. However, if you say your spring is too weak it may be a good idea to obtain the exact sash weight to confirm you have the appropriate calibration. 

I understand that this may be a tedious process but this is the only way for me to ID your hardware and to make sure we get you the right parts for the job. 

Thanks for the additional pictures, Steve. According to our records, this pivot shoe was discontinued back in 2016. I don't believe a direct replacement was ever made but take a look at our 15-179 which is 9/16" thick and 15/16" wide. As long as your pivot bar is like the 26-040 then this pivot shoe can be used as a substitute. Just keep in mind, this is only meant to work with a 5/16" x 3/16" pivot bar like the 26-040. This won't be included in the quote I'll be sending you so you'll have to add this to your cart separately. 

As for the balance, I'm going to email you a purchase link and price quote for (2) 10" S770 balances, our minimum, that you can use to place an order on our website. Please note, the stamp for these new balances will be 10C and a pair of balances with this stamp would carry a sash weighing 10 to 13 pounds. As I mentioned before, you can always weigh your sash on a scale to confirm. If you'd like to make any changes, let me know right here on this page and I'd be happy to do so.