Wolfgang,
The "philosophic" posts are just two old friends joking with each other.
Thanks for the advice from your Meister friend, he says that the part in question is a bush (Schlagbolzenmuttern)that is removeable. The spanner(Schluessel[key])has 2 small pins, or maybe 4 to fit the holes shown.
Mike

Last edited by Der Ami; 06/11/13 05:21 PM.