It was making a noise. And was a little loose.
Took it apart. Liberally put some grease all over and around the bearings. it. Tightened it. Oops, too tight. loosened it and figured out how a cone wrench works. Got is just right.
Noise gone. No more wobble.
I know this is no substitute for replacing the bearings, but it's my beater bike that I traded a couch for in 1992. It was old then.