the hub will have 2 notches on the inside of the hub that a drift pin will be able to catch the race and be drivin out

I use a greese needle to greese mine when I have it off but not going to replace them.

I do new ones the same way and drop them in and drive the seal in,the out side bearing I stick in there and greese with the needle and turn it,then the washer and nut goes on and torque it down while spinning it

you can use a sandwich bag to put the greese in instead of ya hand and do the same thing...just not as messy,and ya can get it in there real good

have fun and get plenty of rags and gojo