Abstract: A multi-section telescopic boom of a mobile crane and a jib for use therewith are provided with jib storage means to enable storage of the jib alongside the boom, with the jib base end adjacent the boom head, and are further provided with manually operable self-storing releasable pinning means for connecting the jib base end to the boom head so that the jib can be swung horizontally between a stored position and an installed position and secured in the installed position.The jib storage means comprise adjustable forward and rear jib storage assemblies, each including storage pins and pin-receiving lugs, and axial movement of the jib effects engagement or disengagement of the storage pins and lugs.The manually operable releasable means comprises a pair of vertically spaced apart pin-receiving members on opposite lateral sides of the boom head, and further comprises a crank-operated pin assembly on each lateral side of the jib base end.

Abstract: A movable window unit for an opening in the roof of a crane operator's cab is swingable between a closed position overlying the opening and an open position clear of the opening and adjacent the rear side of the cab to enable the crane operator to have an unobstructed direct view of the upwardly projecting crane boom.