The axle bearings are pressed into the housing on these style axles,you use a slide hammer type axle bearing puller to remove them and a simple driver /socket& hammer to install them.
You also nee quite a few other tools, many of which you can make if you have a welder etc. :
carrier bearing adjuster
yoke holder
bearing seperator/splitter
hydraulic press
small inch /lb torque
3/4 drive breaker bar n socket for pinion nut
Do some research on google , youtube and a factory manual before hand to get familiar with it first.