Rotary Cutter Replacing Blade Pan RC2060

[HawaiiOrganic]

My Blade Pan (stump jumper) took enough rocks to break free and is now floating on the yolk, with only the blades keeping it from falling off. My local parts supplier will sell me a new pan for about $200, which seems reasonable. I dropped the entire assembly off of the spindle to get a better look at it.
Now i can't get the blades off of the yolk to get a look at how the new pan will attach.

Anyone have any experience with this repair?

Thanks