Bret, take a close look at the posts. If the seat where the poppit seals against the interior of the post is worn- e.g. "scalloped" then you'll need to replace the post and the poppit.
Will do, that's good advice. I bought the rest of my kegs already reconditioned, so this is new for me. As a handyman by trade, I am not afraid of projects. This one sat in the woods for (?) after a bar went to bladder bags, so I have no way of knowing how old it is. It did have pressure and about an inch of diet soda in it. The more I think about it, the more I'm leaning toward replacing everything.
I do have spares for my pin locks, Gordon, but this one is a ball. This "free" keg is getting expensive