Back to your question….. the hub (#12 that has the sprocket bolted to it) does come out separately, without removing any bearings. Mount the sprocket and get a long 2 X 4” piece of lumber under it. Get someone else to stand on the wheel/tire, flat on the floor, sprocket side up. Now work your way around prying it out by pushing down on the lumber. You may need some shims between the lumber and the tire.