On my '04 3326KS, the hubs are greased by a zerk in the center of the outer end of the axle. It is located in a cutout in the end of the hubcap. The cutout is covered with a round rubber plug except when you are actually greasing the axle. When you pump grease into the zerk, it goes in thru the center of the axle to the inner bearing. It then exits the axle into the bearing. From there, the grease moves outwards thru the hub to the outer wheel bearing. Excess grease will come out of the hub all around the zerk. Be careful cleaning the excess out as the opening in the axle is very sharp and will easily give you a deep cut. I clean it out using a cotton bud.
I hope this helps.
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