Write up or guide available for alternator pulley install?

So i guess my main concern is if i split the case will a bunch of parts just fall out? When i remove the old pulley will it affect the fit of the bearing? Will the shaft become loose? Ive could only find one picture of an chrysler alternator set up on a press but it wasnt the best picture, for some reason it wouldnt pull up right and looked grainy but it was just the front half of the case and the center shaft was visible which was supported with a block of wood as the pulley was pressed on. I just didnt know if when you split the case what all becomes loose