Took a look at that old thread, Cowboy. They are, indeed, "Wobble Wheels"
If you look at the web between the spokes, you'll see nuts. These are on bolts that hold the drum to the inside of the wheel. Removal of the entire wheel assembly is required. PITA, but, that's the beauty of Daytons!
You will need to get yourself the proper socket that fits the hub "nuts" that hold the hub onto the axle tube end. They use a 3/4" (I believe) breaker bar to fit the socket. There're two retaining nuts. Remove the outer one, then, there may be a flat metal ring between, which has a tab which fits a sort of keyway that is cut into the axle tube. This also has holes in it which drop over a nubbin on the inner retaining nut. The purpose of this setup is that the ring locks the inner nut in place, the outer nut holds the lock ring onto the inner retaining nut.
Reassembling is reverse, of course. Install the hub assembly, the bearings. Make sure you've oiled he bearings well. Tighten the retaining nut while, occasionally, rotating the wheel assembly to set the bearings. Once you've tightened the nut all the way, back it off a quarter turn until the lockring slips over that nubbin. Install the outer retaining nut and tighten the p*ss out of it. Put the axle back in place. Don't forget to put the rims back on too. The darned truck won't haul much without them!