I haven't had it apart either. I just hate surprises. None of the exploded views show that bearing. The parts documentation, section 2, page 14, part 2, shows a left and right bearing with different part numbers but doesn't show an asterisk for a "non illustrated part". I can only imagine that the terms left and right loosely translated are inner and outer. ** It also shows the seal, part 8

I changed a tapered bearing on a heavy duty trailer once. The bearing fit on a spindle which was also tapered on the inner end. The bearing was held in place with a nut and pin on the outside and a stop on the inner spindle. Trailer, Flat, Utility, US Army issue. This is what I though I might be getting into.