Might have more response / better luck moving this to the heavy equip forums.., I'll ask someone in the A.M. and repost when I know more, my steering cylinders were pretty easy (old Franklin) is that what your referring to, the steer cylinder bushings?
If your talking about the ones in the ears on the rear half of the center section, they are just pressed in. beat them out with a sledge and carefully smack the new ones in using the old ones to hit against