Thank you for the recommendations, Gentlemen. I thought of soldering it, but I'm not sure if I can get the rod out as it's thinner than the swivel joint on the end. That may be pressed on too? I'll clean it up well and try the Loctite.
Thank you!
Here is a photo of the left and right cylinders of the D-32, from AceSteamworks.com 's great site. (Left one's on the left).