First question would be why? Nothing you can do in there to fix anything if bad. And each ball is matched to its' hole once apart. The outer case wears and must be rewelded and remachined to rebuild, or new outer. Same for the inner hub. If the balls have visible damage they are junk.
Yes, comes apart or no way it could have initially been put together. Snap ring like driver side inboard holds hub to shaft but quite a bit tighter and more force used to remove it. The balls remove by tilting joint way to one side, there may be a slight cutout on one location to ease ball removal. Some do some don't.