If it has 2 tapped holes in the hub you can use a steering wheel or harmonic balancer puller. If not put some penatrant on it & screw the nut back on a little ways. Grab the wheel with one hand on each side, brace your feet against the floor & pull bach & forth on the wheel, pulling harder on each side back & forth. That will usually get it but if not maybe you can drill & tap some holes.