The tool is hard to find, I've never used one, make sure to remove
the 4 set screws before trying to remove the spindle nut, use an impact 
driver too so you don't mess up the screw heads, they are on really tight.
The nut comes off with a little tapping with a hammer and punch or 
chisel, but take it easy so you don't mess them up. 
The bearings slide on and off, the races need to be knocked out with a
punch and hammer, make sure to rotate the hub when you put it back 
together and torque the nut back down, I don't like the torque spec in the 
Chilton's book, I just think it's too high, I just keep tightening until the hub
has a rolling resistance and call it good, I have over 275,000 miles on my
stock bearings so I don't see it as a problem.
Good Luck
Wild