Abstract: The disclosure relates to a mobile crane, such as a crawler crane, comprising an undercarriage having a chassis, a superstructure rotatably supported on the undercarriage, and superstructure ballast, with the superstructure ballast comprising a ballast mounting apparatus vertically adjustable by means of a lifting device of the superstructure. In accordance with the disclosure, the ballast mounting apparatus is fastenable to the superstructure in an assembly position by means of a single connection element bearing the vertical load of the superstructure ballast. A centering means is furthermore provided that is adapted to take up transverse forces occurring in the assembly position.

Abstract: The invention relates to an undercarriage for a work machine, in particular a crawler crane, having a frame central part (for receiving a superstructure of the work machine), an elongate strut element which can be mounted on the frame central part, and a crawler support for supporting a crawler chain, wherein the crawler support has a recess for the passage of the strut element, and the strut element along its longitudinal direction has a plurality of spaced-apart locking elements for fixing the crawler support at different longitudinal positions of the strut element.

Abstract: The disclosure relates to a mobile crane, such as a crawler crane, comprising an undercarriage having a chassis, a superstructure rotatably supported on the undercarriage, and superstructure ballast, with the superstructure ballast comprising a ballast mounting apparatus vertically adjustable by means of a lifting device of the superstructure. In accordance with the disclosure, the ballast mounting apparatus is fastenable to the superstructure in an assembly position by means of a single connection element bearing the vertical load of the superstructure ballast. A centering means is furthermore provided that is adapted to take up transverse forces occurring in the assembly position.