Can someone help link me to a former thread or a good disassembly guide to properly disassemble the manual locking hub and removing the brake rotor and inspect and pack the wheel bearings?

I am helping a friend with his 78 Ford 4WD. It has been a very long time since I dove into 4WD front ends. The shop manual he has is pretty much useless. So far I have been able to remove the hub lock selector assembly, the big spring, the snap ring and inner axle to hub gear. But now there is a round piece in there that has 4 notches that looks to be on a bearing that I cannot extract from the hole. I cannot tell if there is another snap ring or some other devise keeping it in there. I cannot find information on getting this part out. I figured I'd try asking here before I rig up a gear puller and try removing it with a little pressure.

Is there a special tool needed to get this part out?

Any guidance (particularly with pictures) would greatly appreciated.