Spiral Balances and Pivot Lock Shoes

Hello,

I agree that the S900-23 could be the correct replacement but these older balances came with a plastic cover that appears to have broken off of your balance. I would recommend checking another window with an intact cover to confirm if it has a diameter of 3/8". If it measured 5/8", you could need the S600 instead. 

As for the colored tip option you'll need, the red tip will support a sash between 7-21 lbs but you could also use Blue (12-22 lbs) or Green (14-26 lbs) based on your sash weight.

Unfortunately, we can't confirm the correct pivot bar based on your 15-178 pivot shoe. If you could remove the pivot bar from the sash to show us another photo, as well as provide written-out dimensions, we'd be happy to look into your replacement options for that part as well. Thank you! 

Dimensions for 15-178

Based on your photo of the pivot bar installed in your sash, I'm reminded of the 26-425 pivot pin and housing. To remove it, you would need to remove the sash and lay it down on a table. Then, remove the two sash screws on the bottom corners and carefully knock off the bottom sash rail from the glass with a wood block and hammer. At that point, you should be able to remove the bottom sash screw and pull out the pivot bar with the housing.

Alternate view of 26-425

Alternate image for 26-425

As long as the specifications of both parts match up to yours, I see no reason why they wouldn't work together. 

As for your spiral balance strength option, either the red, blue, or green tip colors that Casey mentioned would support the weight of your window sash. Which one you use comes down to personal preference since one will not support the sash better than another. 

Please note that these balances need to be charged using something like our 75-006 charging tool. We generally recommend starting with 2-3 turns but you can add an additional turn if the sash is not being properly supported. Just make sure not to exceed 4-5 turns.