Liebherr R 976 – Crawler Excavator with Liebherr D9508 A7 Engine

The Liebherr R 976 is a high-performance heavy-duty crawler excavator designed for the most demanding earthmoving, mining, and infrastructure projects. This model is highly regarded among construction and mining companies due to its robust design, high hydraulic performance, and exceptional component durability. A key role in the machine's operation is played by the Liebherr D9508 A7 engine, which generates approximately 420 kW of power, providing an adequate energy reserve for heavy-load operations.

The excavator's operating weight exceeds 90 tonnes, and the bucket capacity can reach up to several cubic meters depending on the configuration. As a result, the R 976 model is perfectly suited for large infrastructure projects and extraction operations.

Characteristics of the R 976 Model

The Liebherr R 976 is equipped with a durable crawler undercarriage that ensures high stability when operating on uneven and challenging terrain. The machine's design was developed for long-term use in harsh operating conditions, where reliability, overload resistance, and the efficiency of hydraulic systems are crucial. Its high operating weight and optimized load distribution allow for safe operation at extended working ranges.

Thanks to its tracks and the ability to mount various attachments, this crawler excavator is used in:

• large-scale earthworks,
• mining and quarrying operations,
• road and highway construction,
• infrastructure investments,
• loading of bulk and rock materials.

Liebherr D9508 A7 Engine – Approximately 420 kW of Power

The Liebherr D9508 A7 power unit was developed specifically for applications in heavy machinery. This eight-cylinder diesel engine is characterized by high torque available even at low engine speeds, which translates into efficient hydraulic performance and excellent smooth operation of the entire drivetrain.

This engine performs exceptionally well under variable loads, ensuring stable power delivery to the hydraulic pumps and high fuel efficiency. Thanks to a large torque reserve, the operator can maintain high productivity even when working in difficult ground conditions.

The key parameters of the power unit enable efficient operation of systems responsible for:

• working movement of the arm and attachments,
• upperstructure swing,
• powering the main hydraulic pumps,
• machine travel and movement.

Key Parameters of the D9508 A7 Engine

Performance and Working Capabilities

The Liebherr R 976 stands out with high operating efficiency thanks to an advanced hydraulic system and intelligent engine power management. The control system allows for the smooth execution of multiple movements simultaneously, which significantly reduces cycle times and increases productivity on the job site.

The machine is designed for continuous operation in the most demanding environments. High breakout force, an extensive working range, and undercarriage stability make the R 976 highly sought after in open-cast mines, quarries, and major infrastructure projects. Liebherr's heavy excavator series is renowned for its structural durability and low operating costs over a long service life.

Technical Data of the Liebherr R 976

Applications of the Crawler Excavator

Despite its large dimensions, the Liebherr R 976 can be efficiently transported between construction sites using specialized low-loader trailers. Its versatile design allows for the use of various types of working attachments, expanding the range of tasks performed and allowing the machine to be adapted to the requirements of a specific project.

The machine is most commonly used for:

• digging deep foundation excavations,
• mining and quarrying operations,
• loading excavated material onto transport vehicles,
• road and rail infrastructure construction,
• earthworks for large industrial projects.

Summary

The Liebherr R 976 is one of the most efficient crawler excavators in its class, designed for heavy earthmoving and extraction operations. Combining a robust structure with the powerful Liebherr D9508 A7 engine ensures high productivity, reliability, and economical operation. This configuration is highly valued by companies demanding maximum efficiency when executing the most challenging projects.