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MK 73-3.1E

Mobile construction crane

Mobilbaukran MK 73-3.1

The compact 3-axle crane is the answer to market demands for a small, compact and agile mobile construction crane that is extremely fast and flexible in operation. This crane is ready for use in around 10 minutes. Additional transport vehicles are not required for the MK 73-3.1E. The electrically operated crane can be supplied with site power or powered by its integrated generator. The single-engine concept, familiar from Liebherr’s mobile cranes, and its ECOmode feature ensure reliable travel and economical operation on site.

  • Standard - EN 14439

  • Lines - 2

  • Max. lifting capacity - 6,000 kg

  • Lifting capacity at max. radius - 2,000 kg

  • Max. hook height - 51.00 m

  • Luffed jib position - 0 / 15 / 30 / 45 °

Variable support

Two support widths of 5.75 m and 7.0 m, plus the option of half-sided support, enable operation in the smallest of spaces. Safeguarded via an automatic set-up status monitoring system.

Flexible slewing radius

Operates within compact support dimensions thanks to a minimal slewing radius of 3.3 m (without additional ballast). And only 3.5 m with additional ballast.

3 different ballast options

Two additional ballast options increase lifting capacity by up to 40 %.

Single-engine concept

The MK 73-3.1 only requires one engine for travel and operation thanks to its environmentally friendly ECOmode feature. This saves service time and costs.

Trolley-Plus – High-performance luffed positions

The optional, more powerful trolley increases lifting capacity at 15° and 45° by up to 50 %. This makes a maximum lifting capacity of 2800 kg possible in these jib positions.

Manoeuvrability in the tightest of spaces

Compact external dimensions combined with 5 steering modes make a minimal turning radius of 9.67 m possible.

Picture gallery

Technical data

Lifting capacity at max. radius
2,000 kg
Max. radius
38.5 m
Max. lifting capacity
6,000 kg
Standard
EN 14439
Lines
2
Max. hook height
51.00 m
Luffed jib position
0 / 15 / 30 / 45 °
Slewing radius
3.50 m
Hoist gear
18 kW FU
Slewing gear
4,0 kW FU
Trolley travel gear
5,5 kW FU
Drive engine
6-Zylinder-Diesel
Drive engine/make
Cummins
Drive engine/power
243 kW
Number of axles
3
Drive unit/Steering
6 x 4 x 6
Driving speed
80.00 km/h
Operating weight
36.00 t
Additional ballast
2.9 t

Downloads

Technical Data - Mobile crane MK 73-3.1E [m/t]

PDF (1.8 MB)

Technology

ECOmode
ECOmode minimises both fuel consumption and noise emissions when operating the crane superstructure. The crane operator sets the required working speed using the control lever. The crane control system calculates the perfect engine speed for the diesel engine.
ECOdrive
ECOdrive makes the mobile crane significantly more comfortable and quieter by reducing the engine speed. Faster gearshifting delivers greater dynamic and traction offroad. On the road, the torque from the Liebherr diesel engine is used efficiently to minimise fuel consumption.
Single-engine concept
Take one engine out to increase lifting capacity. Or more accurately – the superstructure is powered by the undercarriage engine. Gear shafts are routed from the distributor gear in the substructure via two mitre gears to the pump distributor gear in the superstructure. That enables us to remove one engine – and we use this to increase the crane’s lifting capacity.
Hillstart-Aid
Hillstart-Aid makes starting on gradients easier. Move off safely and easily without rolling backwards.
HVO ready
Up to 90 % lower CO2 emissions in action.
Zero emissions
Zero CO2 emissions when crane operations are powered by the electric motor.

MK 73-3.1E

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