well, on the tear down, I go ahead and pop out all the roll pins from all the shift linkages, slide the shift rails out from all the shift blocks and forks totally disassembling all the linkage... then the shift fork & collar will come away from the hi-lo assembly. At that point, you can use any standard 2 or 3 jaw puller to remove the hi-lo hub without interference from the fork.

now, things are a little different once the Tera's are in place as this doesn't work anymore... because of Tera's replacement shift rail where you can't seperate the shift block from the rail anymore. So, if you mess up and have to remove the hi-lo assembly once you've started the install, then you have to get creative in modifying one of your pullers... I like harbor freight for this because I can by a 2 jaw puller cheap, hack it up to suit my purpose and not feel bad about it.

-Rob