ACAN window won't stay open

It looks like you need new pivot shoes. I can't tell what you have from these photos, though. Can you show me an undamaged version? Seeing it removed from the window ahead of time would be a huge help. Thank you!

I know exactly what's broken. Your pivot shoe needs to be replaced, as evidenced by your first photo. The bad news is that there are dozens and dozens of different possible replacements and I don't know what to recommend based on the given information. There are a lot of details to consider, especially style and size. 

You can look through our complete selection of pivot shoes here for now. I'm afraid that this is the only thing I can do without more of a reference to work off of. At the end of the day, though, you will need to remove one of the originals and compare the size in order to confirm the best match. There's no getting around that. I'll also link some of our tutorial videos that may be helpful to you.

Thank you for your patience during this busy season. You generally want the overall thickness, since the goal is to see what will fit in your track. In your case, that seems to be 9/16".

With that in mind, you may want to consider our 15-121. I cannot guarantee that this will work, but I do think it's the best option we have in our inventory.