Pintovol,
If you have never pulled a wheel before, some are splined really tight or might have some rust in them. When you get to the point where you can't turn the push bolt any farther, don't keep cranking, you will only break something. Rap on the push bolt and it will help to loosen the splines. It might pop loose on the first hit or you might have to tighten it up and hit it again a few more times.
P