Lucille,
I haven't done that task before, but few people would put a pin in a blind hole...there would be no way to drive it out.
Looking at your setup, this means you means you should be able to scratch around and see a corresponding hole into the bore of the large shaft that will allow you to drive the pin into and hammer the shaft out.
If you think about it logically, and that shaft is pinned to keep it from sliding out, there must be a reasonable way to drive the pin out to service the bushings. You can't pull it, so it must drive through! I think '46 was too early for the advent of allen head set screws, and if it's a tapered pin, it has to have access from the backside to drive it out.
This is how I see it, but I was only months old in that year!
Stuart
