pin guide a pin is supported upon the carrier by the pin guide and interacts with one or more cam surfaces supported by the carrier during axial rotation of the pin the cam surface transfers a force to the pin to assist in the extraction and or retraction of the pin into the implement in one embodiment the pin has a user graspable handle which may be rotated and axially moved by an operator a visual indication that the pin is not fully engaged with the implement is also provided additionally a locking mechanism is provided which prevents a pin from disengagement with the implement application_number US 26446502 A description while this invention can be embodied in many different forms there is shown in the drawings and described in detail a preferred embodiment of the invention the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment illustrated for ease of description the coupling assembly embodying this invention will be described in a normal upright operating position and such terms as upper lower upwardly downwardly will be used with reference to this position it will be understood however that the coupler assembly embodying this invention can be used in an orientation other than.