Campag differential brake adjustment

Quoted message said:

Has anyone encountered this problem with a Chorus rear differential
(single pivot and post 2000, that is) brake? The brake doesn't return
all the way after it is engaged (as evinced by suddenly rattling brake
lever).

Lube the cable.
Phil Brown

Since you're convinced the cable is not to blame, go to the Campy web
site and download a parts catalog. Look at the exploded diagram of the
caliper to get a hint as to where a nut might be for loosening the arms
a wee bit. You might want to take off the wheel and blast the pivot
point with WD-40 in case some tar or other crud got in there.

The arm action should be independent of the mounting screw torque.

Andrew Karre said:

Has anyone encountered this problem with a Chorus rear differential
(single pivot and post 2000, that is) brake? The brake doesn't return
all the way after it is engaged (as evinced by suddenly rattling brake
lever).

It seems like it must be the caliper because if I just compress the
caliper by hand, it doesn't pop back. Also, if I loosen the mounting
bolt quite a bit, it seems to spring back just fine, though at the
point it is too loose to engage the 15 mm centering nut. The cable
routing hasn't changed and there doesn't seem to be any undue friction
in the cable. Is there something in the caliper I need to lube? Or is
it a matter of balancing the torque of the mounting bolt with the
centering nut?

Thanks,
Andrew Karre