Feel how the axle spins, if it's smooth with no wobbles, you don't need to do anything. You can pack more grease into sealed cartridge bearings by gently prying off the outer bearing seal-cover, but you have to be very, very careful with a tiny precision screwdriver. Go gently around so you don't bend it or rip the rubber edge. Add grease, pop cover back on. The Phil hubs don't have a protective cap over the ends to protect the bearings, so that outer seal is the only protection against the elements. If it's damaged, you have to pull and replace the bearing. Not that big a deal, any good special-tool place in town should have one for $10-15. Get grade-0 or 00 and it should last 50 years.