Originally Posted by
repechage
The image of the mechanism shown might be too far gone to fix, the connection between the steel pivot and the aluminum body might be compromised.
the early design of this mechanism did rely on screws to hold the arms in position.
cost savings eliminated them no doubt.
the later circlip helped much.
my new in 1972 bike had the same affliction as yours, through the shop I later worked for, I got the body replaced under warranty. I was bummed that it happened, Campagnolo was on such a high pedestal.
Thanks for your experience perspective. I can see it degrading faster the wider the gap opens. Just don’t know when it would fail. If the cable pulled with less of an end load I don’t think it would have been an issue. I’ll rebuild it with some of the suggestions given and report back.