Rotor Bearings and Seals

We used to call these "cups" and "cones." the outer ring is driven (press fit with punch or driver tool) into the rotor hub. The inner "cone" is the inner race with a cage which retains the bearings. You need to get the seal out, various ways. There exists seal remover tools which resemble a tiny crowbar. Sometimes you can use a claw hammer, very large screwdriver with a block for a pry point, or if you are careful, reach through from the front and pop them out with a punch/ screwdriver. Be careful you do not damage the inner cone.