Packing wheel bearing on 2001 nissan altima

Looking at a repair manual for nissan, I couldn’t find anything that tells me if I can pack front or back wheelbearing or how to do it

Your help is appreciated.

The front wheel bearings require the hub and spindle to be completely dis-assembled to gain access to the bearings. This typically requires a shop press. The rear bearings are a sealed unit as part of the rear hub, and these are replaced as a unit. Typically, these bearings, front and rear, do not require periodic repacking, and are replaced only when they go bad.