Cracked window parts

It looks like you just need a new pivot shoe. See our 15-215 for my recommendation. I think this may be just what you're looking for.

We also sell the Series 140 coil balance, if you wanted a whole new assembly.

That's not something I can answer. You will need to refer to the stamp printed on your old assembly to confirm.

These pictures don't really tell me anything new, Bill. If there is no stamp on the old balance that explicitly tells you how much weight they carry, I will need you to tell me two pieces of information:

1. The exact weight of the sash these balances support, down to the ounce.
2. The number of springs used to support it on each side.

With that information, I can recommend a weight rating.