John,
See if the pics appear in post-8 above. I stuck them in but I recall a couple of us mods were playing with adding attachments in other peoples posts a while ago and only certain people could see them.
Yes, you may have to tap to separate things but it looks like that end piece is also the rear bearing holder and not sure what comes apart. Every motor I've seen, not just pump motors, has the switch assembly under that back cover. Those 4 bolts look like they should release the whole thing.
Al