Put a scissor or screw type jack ( two is better ) behind the wheel bearing on the frame so that the hub is under a bit of pressure.
Put a punch on the end of the axel and then hit it hard.
I have an air hammer / chisel thingy that came with the air tools as part of the compressor package they I use on the axle/
he landlord has a rotary hammer / demolition hammer that he uses.
The sharp jolts on the axel , working against the pressure from the jacks will get it off but it might take a while.
You can add some heat to the hub which might help.
Had one I spent all day on, got up the next day and it had popped off all by itself overnight.