Originally Posted by
Benjamino
I'm looking specifically for BR-Z57, which is a Golden Arrow/105 caliper. The date code places it at Jan. '85. I'm trying to rebuild it for future use, but I'm having a hard time getting it so that the two arms stay parallel but without rubbing. An exploded view would really light my fire.
Yeah, yeah, I know. Maybe I should have paid more attention when disassembling...
They really should rub at the fully-expanded position. That's what keep the spring from fully expanding and making the arms stick out sideways. As long as they're not rubbing when compressed to operating width, then you're fine. Also adjust the locknut to take out the play, but not so tight that they return spring can't operate.