Randy H. wrote:
.... cranking wheels to move the carriage was broken.
The spokes broke free of the hub. I believe it is cast aluminum.
....

If it is aluminum, not pot metal, and you don't have a welder, you could
use that aluminum soldering stuff ("Alumiweld" or something like that).
Works with a propane torch, MAPP is better. Kinda pricey, though.
If you could scrounge up a little zinc, it would probably work just as
well (the alumiweld is mostly zinc). A roofer might have some zinc scraps.

Or just use JBWeld, there isn't much force on the wheel.

Bob