These bearings very seldom wear out but are an easy DIY replacement job for someone getting to know their car. Do as some of the above posts suggest. Jack up the front. Grab the tire at 12 and 6 o'clock and try to rock the tire back and forth on the vertical plain. The feeling is subtle but, if they need adjustment, you'll feel just a little play. At that age, I'd pull the bearings, clean and repack. Make sure to replace the seal.
Pelican Tech page.