Liebherr overhauls fast-erecting crane series with control, operating, and assistance systems

Liebherr has overhauled the L1-24 and L1-32 fast-erecting cranes. These new cranes feature new crane control and operating systems, new assistance systems, and crane component optimization.

The overhaul to Liebherr's L series sees the crane size specified in metre tonnes. The new cranes will be known as the 25 L and the 33 L. These cranes have substantial changes to the structural steelwork, an improved hydraulic system, and a new modular drive system. Liebherr also standardized the radio remote control for all bottom-slewing cranes. The standardized operating concept makes it easier to switch between the L and K series, increasing operator flexibility and reducing operator training time.

Liebherr's control system and operating system

The L series fast-erecting cranes are the first machines of their type to feature the fifth generation of Liebherr's own control hardware, Liebherr Control 5. This control system is already being used by a number of other Liebherr machines, including mobile excavators, dumpers, deep foundation equipment, mobile harbour cranes, and wheel loaders. The control system is designed to be robust and durable.

The cranes are also fitted with the second generation of the Tower Crane OS. This means that the cranes feature a new user interface, which top-slewing cranes from the EC-B series began using in 2021. Assistance systems that are possible with the new control system are designed to further increase safety and efficiency around operations and processes on site.

Sway Control assistance system

All L series models come equipped with the Sway Control assistance system for load sway damping. The system detects movements in the direction of slewing and trolley travel that can cause loads to sway. The load sway damping system counteracts and corrects such movements. This can be helpful for inexperienced users or those who only occasionally operate a crane. Sway Control assists with avoiding critical safety situations and facilitates efficient and safe load handling.

Compact performance

"The L series marks the start of a new development generation and sets the standard for future products," says Clemens Maier, product manager at Liebherr-Werk Biberach GmbH. "Nothing has changed in terms of the cranes' compact dimensions and powerful performance. The new Liebherr control system provides us with new, innovative crane operator assistance systems and is optimally designed for current and future requirements."

The cranes offer the fine positioning mode Micromove, which enables careful and precise positioning of loads. This protects the prefabricated parts being positioned as well as the surrounding structure. In addition to this, the Speed2Lift function saves time when it comes to load handling, as it always automatically selects the maximum speed possible with each load.

As with the fast-erecting cranes of the previous L1 series, the jib lengths remain unchanged: 25 or 27 metres for the 25 L and 30 metres for the 33 L. The ballast and transport axle options are also available for the L series, allowing the machines to be used with flexibility. Intelligent assistance systems, quick assembly, and easy handling coupled with a compact footprint make the cranes a great choice for construction firms and crane rental businesses as well as for timber frame companies.