Elaborating on what FB posted, Campy hubs don't require cone wrenches. They disassemble by placing a 5 mm hex wrench into both axle ends and unthread the axle end cap on the NDS of the rear hub and one side of the front hub. Then, using a 2.5 mm hex key (FB was correct) you loosen the clamping bolt of the "cone" and unthread it to get to the cup-and-cone bearings. Campy uses 5/32" bearing balls in reusable plastic retainers for both hubs with 15 balls/side.
As also noted, once the hubs are lubed and reassembled, adjusting the bearing clearance is done with the wheel installed in the frame. The the cone is tightened using a 20 mm open end cone wrench or the 2.5 mm hex key as a lever until all play is just gone and the clamping bolt tightened.
Here is Campy's Tech document index:
http://www.campagnolo.com/jsp/en/docstec/doccatid_8.jsp
Scroll down to "Wheels" and download the .pdf for details.