Check to see if you have a splined steering shaft or the taper shaft with the woodruff key. Splined you probably should use a puller, taper, you remove the nut holding on the wheel mount to the shaft, spray penetrating oil on the between the wheel mount and shaft, screw the nut back on just to cover the threads, take a piece of wood, cover the nut and tap with a hammer while pulling back on the wheel. Reason for re-installing the nut using this method, so the wheel does not fly off and smack you in the forehead
Look for the woodruff key (will look like a half moon shaped piece of steel and will probably fall out when you remove the wheel).
Coat the key with grease to keep in the slot in the shaft.
When re-installing a wheel always lube the steering shaft with a water proof marine grease so if you ever have to remove it again its not a bad job.