You are talking about the bearing next to 1st gear in the middle of the picture? You should be able to get that off without a press. Stand the shaft up vertically with the bearing down. Set it on a block of wood and tap the shaft down on the block. The whole thing should come loose and slide down after a few bumps.
That big bearing at the bottom of the picture does need a light pressing to get off. A bearing splitter and 2 jaw puller should do. Frankly, setting the splitter on some wood blocks and tapping the shaft with a brass hammer should do it too.