Assuming you are trying to get it apart at the center axle flange where the wheel bolts are and not at the cam locks, here is the method I used.
I rigged up a wheel puller using two large carriage bolts through the empty wheel weight bolt holes in the disk part of the wheel and then through a bar with holes which was actually a Ford drawbar from an 8N, the kind that goes in the 3 point hitch when there is no regular drawbar. Then I put a chuck of 4x4 between the bar and the end of the axle and tightened the 2 bolts until the wheel popped off. I also soaked the wheel to axle joint the day before. Any heavy bar would do. You could sub a short chuck of large pipe for the 4x4.
I had previously tried the beating it loose method.
IT took a tremendous amount of force. The 4x4 was crushing.