NO PICTURE HERE BECAUSE:
You are going to have to press apart one whopper of a tight assembly. The RA shaft with gears is not only a tight press into a bearing race, it's pressed in with cyanoacrylate (Super Glue). You must jig this in a press correctly, and carefully, with supports in the right place, or you're just about guaranteed to shatter the cast arm base. This pressure needed took me to the point of "OH Lord, you gotta be kidding me", and when the glue gave way the shock shook the shop.
The factory used a 3/4" thick steel plate with a custom hole bored in it. Think about that.
I want to jump around the process a little to show you how it is assembled, and get you familiar with it so you have an idea of what is coming apart, maybe violently, with a hefty specialty bearing and shaft shooting out the bottom of the press when it breaks free. Have your padding under the press to drop the RA shaft and bearing onto, just in case.
Edited by apfever, 04 June 2015 - 05:54 PM.