the original tools looks like this:
part 5+6 in combination with tool 1
now some selfmade tools from boardmembers:
#1 take a look on the pic with this little wooden board
#2 down in the pic is a row with three screws, above these you can see a long screw with a heavy load wall anchor, the big roll from steel works here as a pullhammer on the long screw so you don´t need a thing like tool 1 in the first picture.
there is another method, you can fill the space behind and in the beearing with a very thick grease or dough, then push a bolt through the bearing, wich closes the inner ring completely, so the substance behind the bearing will push it out
