How about a few youtube clips on doing just that....
[ame=http://www.youtube.com/watch?v=79Z2DMUb8Ic]Kubota Tractor Front Axle Bearing Repair Part 1 - YouTube[/ame]
[ame]http://www.youtube.com/watch?v=97WcQx7Gmkk&feature=endscreen&NR=1[/ame]
[ame]http://www.youtube.com/watch?v=OAVmkdcyci0&feature=relmfu[/ame]
KennyV