Inner primary bearing

[66SHOVELHD]

Been a looong time since I've been in a Shovel inner primary and have one on the lift right now. My question is regarding the mainshaft bearing. I don't see any retaining ring on either side of the bearing race but it's VERY rusty. As I'm trying to cure a starter alignment issue due to offshore junk inner and outers I don't want to grenade this inner that I've been keeping around just for this occasion.

Any input will be appreciated.

BTW, when checking the service manual it says: "If bearing shows signs of wear or is rough, replace bearing." 
So much for instructions 

Thanks

[sandrooney]

66, I answered on General.
SR

[ST40]

I don't remember any retainers on my 73.    I think I just removed the bearing with a seal driver.      Marty

[76shuvlinoff]

If I recall the only thing holding my inner primary bearing in place is friction and some locktite sleeve retainer for good measure.