Liebherr PR 736 – Crawler Dozer with D934 A7 Engine

The Liebherr PR 736 is a modern crawler dozer belonging to the medium-class segment of earthmoving machinery, highly valued for its high performance, durability, and low operating costs. This model is widely used in infrastructure construction, open-cast mining, quarries, and land leveling operations. A key element of its design is the Liebherr D934 A7 engine, which is responsible for the machine's main drive and generates an output of approximately 150 kW. Thanks to its high torque, the power unit provides adequate tractive effort even when working in highly challenging terrain conditions.

The operating weight of the PR 736 ranges from approximately 25–27 tonnes, allowing it to efficiently perform heavy earthmoving tasks while maintaining high stability and precise control.

Characteristics of the PR 736 Model

The Liebherr PR 736 has been designed to operate in demanding construction environments. The robust crawler undercarriage guarantees excellent traction on soft, muddy, and uneven ground. The hydrostatic travel drive, characteristic of Liebherr machines, ensures seamless speed regulation and precise maneuvering, even when operating under heavy loads. The machine's design has been optimized for durability, operator comfort, and ease of maintenance.

Thanks to its tracks and the possibility of mounting additional attachments, the crawler dozer is ideally suited for:

• land leveling and grading,
• road and highway construction,
• operations in open-cast mines,
• moving large volumes of soil and aggregates,
• site preparation for industrial investments.

Liebherr D934 A7 Engine – Approx. 150 kW of Power

The Liebherr D934 A7 unit is a six-cylinder diesel engine designed specifically for application in heavy-duty machinery. The design focused on high reliability, low fuel consumption, and achieving high torque even at low engine speeds. This allows the dozer to maintain consistent performance even during intensive operations with a fully loaded blade.

An output of approximately 150 kW at 1,800 rpm and a torque exceeding 1,000 Nm enable efficient operation of the systems responsible for:

• working blade operation,
• control of the hydrostatic travel drive,
• powering the hydraulic pumps,
• travel and transport of the machine in difficult terrain.

Key Parameters of the D934 A7 Engine

Performance and Operational Capabilities

The Liebherr PR 736 stands out for its excellent running smoothness and precise control. The hydrostatic drive system enables smooth torque transfer to the tracks without the need for a conventional powershift transmission. This solution translates into greater accuracy during land grading and reduced energy losses.

The machine handles heavy loads perfectly thanks to the appropriate combination of an efficient hydraulic system and the flexible characteristics of the D934 A7 engine. For many years, the PR series has been recognized as one of the most economical and durable dozer families available on the market, particularly in the infrastructure and mining sectors.

Technical Data of the Liebherr PR 736

Applications of the Crawler Dozer

Due to its design and high tractive force, the Liebherr PR 736 can be easily transported between construction sites and utilized in various heavy industry sectors. The machine finds application in large-scale infrastructure projects, as well as in raw material extraction and the reclamation of industrial sites.

The machine is most commonly used during:

• road and highway construction,
• preparation of investment sites,
• earthworks and land leveling,
• operations in quarries and open-cast mines,
• reclamation of industrial areas.

Summary

The Liebherr PR 736 represents a proven solution for enterprises undertaking demanding earthmoving operations. The combination of a robust crawler design and the reliable Liebherr D934 A7 engine with an output of approx. 150 kW ensures high efficiency, low operating costs, and a long service life for its components. Consequently, this model remains one of the most highly regarded medium-class dozers in the construction and mining industries.