Liebherr R 956 – Crawler Excavator with Liebherr D946 A7 Engine

The Liebherr R 956 is a heavy crawler excavator belonging to the esteemed series of machines designed for demanding earthmoving, infrastructure, and industrial works. This model stands out for its high operational efficiency, robust construction, and advanced hydraulic systems, which ensure effective performance even in the most challenging terrain conditions. The key element of the powertrain is the Liebherr D946 A7 engine, which is responsible for the machine's main drive. This unit generates an output of approximately 250 kW, providing an adequate power reserve for all operating systems.

The operating weight of the excavator is around 55–60 tonnes, while its working parameters allow for the execution of advanced excavation, loading, and demolition works.

Characteristics of the R 956 Model

The Liebherr R 956 was designed with intensive use in heavy construction and earthworks in mind. The robust crawler undercarriage guarantees high stability during operation and excellent traction on muddy or uneven ground. The superstructure design has been optimized for durability and overload resistance, resulting in a long service life for the machine even in multi-shift operations.

Thanks to the tracks and the possibility of mounting various attachments, the crawler excavator is used for:

• excavating deep foundation pits,
• road and infrastructure works,
• demolition works,
• loading loose materials,
• works in mines and quarries.

Liebherr D946 A7 Engine – Approximately 250 kW of Power

The Liebherr D946 A7 engine is a six-cylinder diesel unit developed specifically for high-power working machines. The engine design has been optimized for high torque at low engine speeds, which is of key importance when working under heavy loads. As a result, the operator can count on smooth hydraulics operation and stable working parameters regardless of the operating conditions.

The unit achieves an output of approximately 250 kW at 1800 rpm and a torque of around 1650 Nm. These parameters enable the efficient operation of systems responsible for:

• the working movement of the arm and attachments,
• superstructure rotation,
• powering the main hydraulic pumps,
• travel and movement of the machine in the terrain.

Key Parameters of the D946 A7 Engine

Efficiency and Working Capabilities

The Liebherr R 956 is characterized by very smooth operation and high control precision. The advanced hydraulic system allows for the simultaneous execution of several working movements without a noticeable loss of performance. The operator has intuitive control systems and electronic hydraulic oil flow management at their disposal, which translates into higher productivity and lower fuel consumption.

The machine was designed to work under heavy loads for extended periods. High breakout force, large lifting capacity, and the robust construction of the boom make the R 956 model perfectly suited for the implementation of the most demanding construction projects. An additional advantage of the Liebherr series is the high durability of components and easy service access.

Technical Data of the Liebherr R 956

Application of the Crawler Excavator

Thanks to its weight, efficient hydraulic system, and wide range of available attachments, the Liebherr R 956 is utilized in many sectors of heavy industry. Transport of the machine to the construction site is carried out using low-loader trailers, and once on site, the excavator can perform a wide range of tasks without the need for additional specialized machinery.

Most frequently, the machine is used for:

• excavation for building structures,
• road and highway construction,
• demolition and dismantling works,
• open-cast mining operations,
• loading aggregates and loose materials.

Summary

The Liebherr R 956 is an efficient heavy-class crawler excavator that combines high structural durability with modern hydraulic solutions. The applied Liebherr D946 A7 engine provides the appropriate power and high torque necessary for the execution of the most demanding earthworks. Thanks to this configuration, the machine remains a reliable and valued tool used by construction, infrastructure, and industrial companies worldwide.