All you need to do is pry off that cover. There will be either a nut or a simple "C" clip that need to be removed. Once removed, the wheel may be stuck to the axle. You can take a hammer and hit the tire with the side of the hammer to help break it free. Don't hit it with the head of the hammer or it may hurt you or the wheel/tire. Good luck.
crazykartman, August 2008
