I had a WC-1 a few years ago and IF I remember correctly the axle was held in place by lock cones. Clean the area under the flange nuts and see if it looks like a very tight lock washer is recessed there. If so , take a very large sledge hammer and strike the center of the flange. I do not mean a small hammer,10 lbs. at least. Also strike the flange with a lot of force.The axle should rebound and the cones will start to pop out. Like I said IF I remember correctly on that series of truck. You may have to strike the flange several times.