All set. I ground about 7? of the 10? axle down far enough to fit snugly through the bearings. I left the other 3? at the original size so that doesn't slip through the dimpled bracket that holds the axle to the wheelbarrow frame or slip through the bearing. With the other bracket slid up close to the bearing, the wheel is centered and can't move side to side.
I grease the axle through the zerk fitting until it oozed out around the bearings. The bearings spin but the axle is snug.
Thanks for all the suggestions.