Liebherr LHM 420 Mobile harbour crane

The design of the LHM 420 has been optimised for ships in the Post-Panamax class. The Liebherr mobile harbour crane series raises and lowers loads at up to 120 metres per minute. The LHM 420 has a maximum load capacity of 124 tonnes and handles up to 38 containers per hour with its hybrid drive. The versatile crane is also suitable for the efficient handling of bulk cargoes, as well as the safe transportation of general cargoes.

Stage IV / Tier 4 final engine

The individual wheel sets of the LHM undercarriage enable movement in all directions and thus 360-degree mobility.

X-shaped support base

The star-shaped supporting base reduces the torsion strain on the steel structure, enhances the service life of the slewing ring and guarantees optimal vertical stability during operation.

Supporting pads

The standard version of the crane has four supporting pads (5.5 metre x 1.8 metre).

3-point support

The hydraulic combination of the wheel sets in three groups prevents overloading of the individual wheel sets and the ground. The grouping also ensures maximum stability when manoeuvring the crane.

Individual wheel sets

All wheel sets are steerable and have load balancing. Ground pressures of six tonnes for each wheel are not exceeded. Accessibility from all sides guarantees easy maintenance.

4-chord boom

The four struts (lattice design) of the boom provide maximum stability and handle the sideways pull better than alternative boom designs. This results in a longer service life.

Lighting

Operation without a loss of productivity is also possible when it is dark. High-performance LED headlights at the boom and tower provide optimal lighting.

Slewing mechanism

The LHM 550 has three slewing mechanisms connected in parallel. The loads for the slewing ring are reduced to a minimum.

Enclosed tower design

The enclosed design of the tower gives the crane operator secure and weather-protected access to the tower cab.

Glass fibre reinforced plastic

The machine housing panels are made from glass fibre reinforced plastic. The advantages include low weight and resistance to rust.

Tail swing radius

The tail swing is within the support base for all crane types in the LHM series. The risk of collision with passing machines is thus avoided. The crane operator can concentrate solely on his work.

Horizontal load path

During luffing the load always moves along the horizontal load path.

Cooling

The speed of the special Howden coolers is automatically adapted to cooling requirements. As a result, diesel consumption and noise levels are reduced to a minimum and the service life is maximised.

Paintwork

To defy the rough maritime environmental conditions, the standard paintwork comprises a primer coat, an intermediate coat and a top coat.

Litronic crane control

The control system of the mobile harbour crane range, which was developed by Liebherr, focuses on precision, safety and productivity. Obtain a detailed overview here.

Machine housing concept

The single-storey slewing platform houses the drive unit, slewing mechanisms and hoist mechanisms, the control cabinet room and the alternator. All components are easily accessible for maintenance work.

Control cabinet room

All electric and electronic components used satisfy military standards. External environmental conditions have no impact on the functionality. The entire system was developed for the maritime environment with temperatures from -40°C to +80°C.

Slack rope protection

A slack rope protection device is mounted on the winch frame. The winding on the winch is effected evenly, and the hoist rope is always kept taut.

Service network

Like all maritime cranes from Liebherr, our mobile harbour crane can rely on a dense service network worldwide. This ensures short downtimes and a quick response.

Tower cab position

Optimal views for the operator. The forward-mounting position of the tower cab with 70% glass (safety glass) offers the driver a comprehensive visibility range.

Accessibility

Regular servicing maintains the efficiency of the crane. So maintenance work can be carried out quickly, the accessibility of the relevant components is to the fore. This reduces downtimes.