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Your bushing is shot. The arm should not slide easily off the ball with the bushing in place.
Mike - the bushing stays on the ball. The arm slides on and off of the bushing w/o much effort. I popped the bushing off. It's still pliable, and in one piece. I'm replacing it today as it was available locally (WorldPAC).
The clutch unit is a cool looking piece of machinery, BTW.