Easy. Just need the right tools. The slide hammer axle bearing tool is necessary, for a proper and quick/easy repair. Be careful while doing the bearings as they can sling pieces very fast, safety glasses.
What type of axle? 1/2 ton? Just need to pull the diff cover off, remove center pin bolt, remove center pin, remove wheels and drums, push axle shafts in towards each other, remove c-clips, pull axles out, get a slide hammer with an axle bearing attachment, pull the old seal and bearing, get a bearing/seal driver set and install both. Then it's just the reverse. Don't even need to touch the brakes.
Make sure to check your axle shafts for wear as well. As well as I like to put a small film of rtv around these circular drivetrain seals, just some reassurance.
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