Hydraulic quick coupler

One quick coupling portion has one guide bolt (24) that engage a centering bore oppositely arranged. Each quick coupling portion (12,14) has coupling plugs (32) or coupling sleeves for the connection of hydraulic lines (46). One coupling portion is arranged at a movable manner on one structural component in order to connect or separate the two quick coupling portions. An independent claim is also included for a quick coupling method for structural components of cranes.