My Truck is a little bigger but it works the same way to get to the front brakes,
Remove the front wheel and now we can see the bearing will need to be pulled to get to the brakes.
Remove the cover to get at the bearings.
Kinda small bearings for a big truck, but it is rated only for 16000 lbs.
once the outer bearing is removed you can pull the front hub/drum assembly off.
Remove the inner bearing and seal.
clean up the bearings and seal then repack with nice clean greese.
While you have the hub removed its a good time to repack your bearings!