Unless someone else has a magic way of doing this, you'll have to remove the brake assembly with those three bolts you talk about. Otherwise, you won't be able to put any pressure on the back side of the rivets.
As far as a repair manual, check out I&T JD4. General repair manual, NOT all inclusive, skips a few things that I've run into.
I've heard there is another service manual, but I've never purchased it. I will wait and see what others suggest. I may have to purchase this myself if everyone agrees it's worth the money.