I am halfway through replacing the one in my Cal 9.2 (its's out, still have to put a new one in). Some have set screws to hold it in, others (like mine) just rely on a tight fit. having done this three times now, I have found that cutting the bearing with a hacksaw and collapsing it is the way to get it out. A threaded rod with some large washers and nuts allows easy insertion of the the new bearing. Don't even consider driving it in with a hammer.