Depending on whether it has a key retainer or lock washer retainer...
Remove wheel.
Removing Or Installing Axle Shaft Bolts
Remove axle shaft and axle shaft gasket (if used) or clean off RTV sealer.
Removing Or Installing Wheel Bearing Adjusting Nut
Bend tang of lock washer away from the outer lock nut and remove the outer lock nut, lock washer and inner lock nut.
Remove outer wheel bearing.
Pull hub and drum straight off axle housing. If brake lining is dragging on brake drum, back off brake adjustment by rotating adjustment screw.
or
Remove wheel, axle shaft and axle shaft gasket (if used) or clean off RTV sealer.
Remove retaining ring and key, then remove locknut from housing tube, using appropriate tool.
Removing Or Installing Wheel Bearing Adjusting Nut
Using appropriate tool remove adjusting nut from housing tube.
Pull hub and drum straight off axle housing. If brake lining is dragging on brake drum, back off brake adjustment by rotating adjustment screw.