MK 73-3.1 mobile construction crane

MK 73-3.1E

Mobile construction crane

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.

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Standard - EN 14439
EN 14439
Lines - 2
2
Max. lifting capacity - 6,000 kg
6,000 kg
Lifting capacity at max. radius - 2,000 kg
2,000 kg
Max. hook height - 51.00 m
51.00 m
Luffed jib position - 0 / 15 / 30 / 45 °
0 / 15 / 30 / 45 °

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What's inside

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.

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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

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

PDF (2.7 MB)

Videos

MK 73-3.1E Mobile construction crane

Driving conditions

On-road driving

Jobsite driving

Ballast systems

Counterweight

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.

MyLiebherr

Our customer portal MyLiebherr is your entrance to the Liebherr service world. It gives you access to extensive basic and additional services for your mobile and crawler cranes

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From site to site: The new MK 73-3.1 from Liebherr in action

Short setup times, high-performance lifting – the new Liebherr MK 73-3.1 mobile construction crane proves its worth as a compact taxi crane for everyday construction site use.

Customer magazine

The magazine for customers and friends of mobile and crawler cranes. Here you will find some extraordinary crane impressions and stories!

Used cranes

Liebherr is also specialized in used mobile and crawler cranes. We ensure the safety and durability of the cranes by our global service network.