Liebherr-Werk Nenzing GmbH has introduced new features for its LR-series crawler cranes that aim to improve safety and efficiency on challenging lifts – particularly when handling long loads or performing lifts on floating structures.
The solutions are available on crawler cranes with lifting capacities between 130 and 400 tonnes.
One of the new systems is a pile-tilting device designed to replace the need for tandem lifts when tipping or turning long and heavy loads. Traditionally, these lifts require two crawler cranes operating in tight spaces and high levels of coordination between crews.
Liebherr said the new device allows a single operator to tilt or rotate loads of up to 90 tonnes from 0 degree to 90 degree using the standard crane controls, without diagonal pull on the boom. Two hoisting winches act on separate hooks and can be controlled synchronously or separately to reduce load sway.
Because the device mounts on the same axis as the pulley set, the crane’s geometry and load measurement remain unchanged, ensuring the load moment limitation continues to function during the lift.
Liebherr said lifting with the pile-tilting device increases safety by reducing the number of people required in the danger zone. It also offers sustainability benefits through reduced fuel use, emissions and transport needs, and requires less jobsite space – a major advantage on urban projects. The system can be fitted to both new and older compatible LR crawler cranes.
Floating lifting mode
Liebherr has also developed a new operating mode for lifts on floating structures, which can cause changes in barge inclination and affect crane stability as loads are lifted or swung.
The manufacturer said paper load charts alone are difficult to manage safely in these situations due to varying listing angles and shifting centres of gravity.
The new floating mode incorporates load curves for different inclinations – 0 degree, 1 degree, 2 degree and 3 degree – and includes load moment limitation for enhanced protection. The inclination of the unit is continuously monitored and displayed. If it exceeds a permissible limit, a warning is issued and the operator can adjust settings to match the actual inclination. The system also prevents the boom angle from exceeding its maximum limit when placing loads at a small working radius.
As part of the concept, Liebherr has integrated its ‘vertical line finder’ assistance system, which automatically positions the boom head over the load’s centre of gravity. This helps prevent diagonal pull and reduces the risk of load contact with obstacles or people. Liebherr said the system also reduces dynamic forces on the boom, extending crane service life.