I'm about to dismantle a 1998 Campag Chorus Ergolever, as I suspect that the G springs need to be changed. I then hope to reassemble them having replaced worn parts. I'm looking for any useful information that supplements what I've already found:
- Exploded diagram on Page 41 of Campagnolo's 1998 spare parts catalogue
- Video of Overhauling Campagnolo Ergopower Ultrashift 2009
However, there's quite a difference between the components of the 2009 and 1998 levers, so what I'd most like to find is a video showing the disassembly and reassembly of the 1998 levers. Or anything else that you think might help me.
What's wrong with the levers? The rear gears shift to lower sprockets of their own accord. They hold in gear for maybe 20-30 seconds before shifting. I've tried the suggestions from @mikezs in Right campagolo gears slipping. The right-hand lever has almost no audible click - this leads me to suspect the G-springs.