torque wrote on 12/31/69 at 16:00:01:#29 cant really "brake" it just a cotter pin,that holds #25 in place theres never any pressure on it.
after looking at my #24 im going to get a new one, while i have it apart .theres a hell of lot of pressure on such a weak part.
Since the cam is located by the flat on the shaft, the cotter pin is probably intended to shear first. Maybe, maybe not. As Digger said, there must have been fatigue developing in the cam.
Either way, Jim gets a First Time Award for clutch breakage. I don't think we've heard of this before.