Am replacing the front discs, using OEM discs - 84K miles on originals, we brake gently! Rotors look good & true. Should I lube, and/or replace the wheel bearings? ThanX guys, in advance - will donate to the Anhauser-Busch Fund in your name tonight!

 

No need to replace if they are not bad.
If need to. You will need to a "press" to press out the old one and press in the new.

Sealed bearing---no maintenance needed.