If the pedals have a removable endcap it's easy enough to service. Just remove the cap (it's plastic and threaded in place). You'll see a locknut/washer/nut stack on the end of the spindle. Remove those and slide the pedal off of the spindle but be careful because the ball bearings are loose (not caged). Clean it up, repack and reassemble. Adjust them so that they spin freely but have no play (along the length of the spindle). Getting the adjustment right takes some patience. You'll get the inner nut just right but when you tighten the locknut the pedal will bind because it's too tight. Just loosen the inner nut so that it is slacker than you would like and let the locknut snug it into place. The washer is designed to prevent the locknut from affecting the inner nut but it's not perfect....just be patient.

If you're not comfortable trying it, take it to a cool LBS and let them show you how to service one of the pedals and try the other one yourself...it's a good way to learn.

Finally, there is a cool campy pedal tool that allows you to remove the plastic endcap without chewing it up. If you can find one grab it but it's not a necessity.

Jim