Print out a (preferably) A3 exploded diagram from the Campagnolo website.
There are also PDF guides on servicing.
Once you understand the principle of operation (it's essentially just a barrel which is ratcheted which you push back and forth), then it's not too difficult.
I stripped mine in degreaser and then used Weldtite Teflon grease, particularly around the G-springs.
Print out a (preferably) A3 exploded diagram from the Campagnolo website.
There are also PDF guides on servicing.
Once you understand the principle of operation (it's essentially just a barrel which is ratcheted which you push back and forth), then it's not too difficult.
I stripped mine in degreaser and then used Weldtite Teflon grease, particularly around the G-springs.