How to press on right rear axle bearing w Hydraulic press

I would check the other side and replace the inner seal. If the backing plate looks fairly dry and not covered by fresh oil, I'd remove the shoes and pull the axle, wash [soak] it in a round can until all the grease/grime is gone, air blow it, and check the bearing for smooth turning. Pack the bearing with wheel bearing grease until the grease comes thru the rollers. Add about 1/8'' more and assemble. Recheck axle end play.