Help identify the correct parts for a UB 28D

Hi George. I can't confirm the identity of your old balance without seeing photos of it, but if the attachments and dimensions match the S380-29, then this would make sense; a stamp option of 28D does conform to our stamp option of 2840. It sounds like you also need Take-Out Clips; if there's an identical window in the house that still has them, see if our 16-002 matches what you need. 

Hi George. Yes, thanks for clarifying--sounds like you're describing the Top Sash Guide. These are nylon pieces on the top corners of the window sash, and as you surmised, they're meant to keep the channel balance from shooting past the sash. These tend to break down from wear and sun exposure, and when they do, you can experience the problems you are having. We carry a wide variety of Top Sash Guides here, and the only way to know for sure which one you need is to see an undamaged version out of the window and from the front and side. For information on how to remove and replace Top Sash Guides, see the video below.

Thanks for getting back to us, George. That top sash guide looks just like our 18-180. Look it over and let me know if you agree.

Hello, George. The 18-180 top sash guide is sold separately, so don't forget to add that to your cart before you checkout. Our balances come fully assembled and ready to install out of the box. The rule of thumb is that if something isn't directly riveted to the balance, then it's sold separately.