Crane having a counterweight adjustment device, and method for adjusting a counterweight on a crane

A method for adjusting a counterweight unit on a crane comprising a lower carriage, a superstructure which can be pivoted about an axis of rotation with respect to the lower carriage, and a counterweight adjustment apparatus, wherein the counterweight adjustment apparatus comprises a telescopic framework which is fastened to the superstructure and has a telescopic longitudinal member, a counterweight unit which is arranged so as to be displaceable along the framework, a drive unit for displacing the counterweight unit in a driven manner on the framework, and a kinematic unit which can be coupled to the drive unit in order to telescope the framework in a driven manner on a crane, the method comprising:

• displacing in a first step the counterweight unit along the framework in the region of the superstructure as far as onto a cantilever element arranged at the rear end of the longitudinal member remote from the axis of rotation and fastening the counterweight unit at this location;
• and
• telescoping the counterweight unit in a second step in relation to the superstructure, inwards and outwards on the cantilever element with the framework via the drive unit.