Liebherr presents railroad excavator, extensive portfolio of attachments at Innotrans 2024

At Innotrans 2024, Liebherr presented the A 922 Rail Litronic railroad excavator, a machine suitable for use on railway tracks and road construction. With the A 922 Rail, Liebherr offers the basic machine, the rail travel drive, a quick coupler system, as well as new attachments and safety systems developed by Liebherr.

The Liebherr A 922 Rail railroad excavator provides flexible use on road and rail 

With a 120 kW/163 hp engine, the A 922 Rail achieves a high working speed with smooth working movements. The hydraulic system of the A 922 Rail consists of a Liebherr variable displacement double pump with independent control circuits. The hydraulic attachments can thus be operated independently of the working and travel movements.

The delivery rate of the proven Liebherr variable displacement double pump was increased to 2 x 220 l/min for better performance. The heavy ballast was also redesigned to yield the best bearing load values with improved weight distribution and a more compact rear dimension of 2,000 mm.

Service-orientated machine design

Aiming for a service-oriented design, the A 922 Rail offers short maintenance times and minimizes the associated maintenance costs of time-consuming processes, as all maintenance points are easily accessible from the ground.

The new generation has also simplified access to important components even further; for example, air, oil, and fuel filters, as well as the main battery switch, the central lubrication point for the undercarriage, and the pilot valves for the hydraulic system, are much easier to access.

Comfortable double cab

The spacious double cab features a standard rollover protective structure (ROPS) coupled with a modern interior design that offers the best conditions for comfortable, focused, and productive work. Entrance lighting is provided to make accessing the cab easier.

The usual generous use of glass and standard rear and side cameras provide an exceptional view of the working area and swing range. The touch-screen colour display used for operational purposes, as well as the other control elements on the console, are designed to create a cohesive unit.

Security systems direct from the manufacturer

Occupational safety is extremely important in track construction. As a result, Liebherr provides their own safety mechanisms, which are aligned with the machine's requirements. Such safety technologies include load torque, height and sway limitation, and the virtual wall.

Liebherr undercarriage for use on tracks worldwide

The A 922 Rail is available with various undercarriage versions with different track widths and rail wheels, making it possible to use it on tracks worldwide. 

An independent variable displacement pump for the rail travel drive provides ideal traction and safe propulsion at all times. Standard integrated brakes in the rail wheel shorten the braking distance in both the lowered and elevated positions, enhancing safety.

New Liebherr attachments and proven quick coupling system

To meet diverse construction site requirements, Liebherr offers an extensive portfolio of attachments for the A 922 Rail, some of which were presented at Innotrans. 

For instance, the company's newest rail tongs, which have been specially designed for the proven gripper mechanism of the GMZ 22, were introduced at the event. The attachment, which has been specially developed for Liebherr's railroad excavators, was designed in close collaboration with machine operators and enables efficient and speedy work with the track strand.

Liebherr also exhibited the new GMP 25 parallel grab and the SG 20B sorting grab with universal tongs during the exhibition, as well as the Tiltrotator TR 25 and a grading bucket. 

The A 922 Rail was exhibited equipped with a Solidlink 33-9 which adds further couplings to the fully automatic quick coupling system. The expansion of the couplings to include a second high-pressure circuit also enables the use of hydraulic attachments such as tamping equipment in rail construction, mulchers with flaps, or Liebherr stick extensions. The Solidlink fully hydraulic quick coupling system allows attachments to be changed quickly and safely from the operator's cab.