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For the MK 73-3.1, Liebherr has chosen proven technology in an extremely compact form. The small mobile construction crane combines all the features of its big brother, the MK 88-4.1. With a total length of 13.80 m, a width of 2.75 m and a height of 4.0 m, it is impressively compact and, as a result, extremely easy to manoeuvre. It offers a 6-tonne maximum load capacity.

To meet the typical demands of densely built-up inner city construction sites with projecting edges, this latest mobile construction crane has been designed with long reaches in mind. With a jib length of 38.5 m, it offers a jib head load capacity of 2,000 kg with corresponding additional ballast. In a 45-degree luffed jib position, the crane reaches a lifting height of 51 m and has a maximum lifting capacity of 2,800 kg; up to 1,850 kg at the jib head. Engineers have placed strong emphasis on a design with a consistently high maximum load capacity in all luffed jib positions. Three possible luffed jib positions ensure flexible operation.

Like its big brothers, the MK 73-3.1 operates electrically on site, either via site power supply or its integrated electric generator. This ensures an extremely quiet and emission-free presence, which in turn is ideal for working at night and in noise-sensitive areas. The small mobile construction crane is also designed for operation with 63 or 32 amps. Working speed is in no way restricted when using the 32 amp option.

Similar to the other mobile construction cranes in the series, the crane operator is supported by diverse assistance systems. Highlights include an infinitely adjustable lift cabin and modern camera systems?–?both load and undercarriage are always in view. Assistance systems such as the Micromove fine positioning mode ensure precise load handling. Five steering programmes with active rear axle steering and half-sided support enable the crane to be used on particularly tight construction sites.