How to overhaul a campagnolo hub
For rear hubs, begin by removing rear cogs. Remove quick release skewer. If it is a solid axle type, remove axle nuts.
Inspect axle ends. Measure and note the amount of axle protruding past locknut. For quick release hubs, counting the number of threads is an adequate measurement.
COUNT THE NUMBER OF THREADS PAST LOCKNUT FACE FOR A REFERENCE OF AXLE PROTRUSION
(OPTIONAL) Mount in axle vise, if possible. Mount right side down with left side facing upward. Generally, dismantle from the left side.
Remove any rubber cover. Use a tie or string to hold small parts in the same orientation as they came off of hub.
Hold cone using cone wrench, and loosen locknut counter-clockwise.
Remove locknut and any washers, placing them on the tie.
Remove cone by turning counter-clockwise.
Place hand below right side, and lift wheel slowly. Be prepared to catch bearings that fall from hub. Place wheel on bench.
If inspecting bent axle, remove right side locknut and cones. Note that left side and right side cones, washers and locknuts may be different. Do not mix the left and the right side parts. Use tie method to keep track of parts. Also note axle thread may be asymmetrical. The side with more axle spacers gets more axle thread.
Count the number of bearings on each side, and then use pencil magnet to remove bearings from hub shell.
For many hub models, it is possible and recommended to overhaul with the pressed dust caps in place. Dust caps may be fragile and removal may result in damage. Work around dust caps when cleaning and inspecting.
Wipe and clean all parts to make sure they are dry for assembly. Wipe freehub mechanism out with damp cloth. Remember not to soak freehub in solvent. Freehub bodies are lubricated internally with a light lubricant, while soaking them with solvent will remove lubrication.
How to adjust a campagnolo hub
If you find out your hub is loose or making noises, you may probably need to adjust the tension in the hub. Next, I’m going to show you how to adjust Campagnolo hubs.
Use a two and a half millimeter allen key and pop it in the screw to undo it a little bit.
Hold the part of the axis on the other side (the side without screw), and tighten it.
Check if it is still loose. If it is a little loose, tighten it a little bit more.
When you think you have tightened the axis, screw the bolt again and well tighten that nut. Spin the wheel to feel if everything runs smoothly. If not, you need to loosen the screw and do the above steps again.