Liebherr R 946 – crawler excavator with Liebherr D936 A7 engine
Liebherr R 946 is a high-performance crawler excavator in the approximately 45–50 ton class, designed for intensive earthmoving, demolition, and infrastructure work. This model belongs to the respected heavy machinery series from Liebherr, known for structural durability, high hydraulic precision, and very good fuel efficiency. The key element of the drivetrain is the Liebherr D936 A7 engine with an output of approximately 190 kW, responsible for stable operation of the hydraulic systems and smooth machine performance even under heavy load.
The machine offers great digging depth, high lifting capacity, and excellent stability when operating on demanding terrain. Thanks to its solid crawler undercarriage, the R 946 model is used both in heavy earthworks and in handling large infrastructure projects.
R 946 model characteristics
The Liebherr R 946 was designed for maximum durability and efficiency during multi-shift operations. The reinforced crawler undercarriage ensures excellent traction and stability even on unstable ground, while the properly balanced upper structure improves operational safety when working with heavy attachments. The operator has access to an ergonomic cab and a precise hydraulic control system enabling smooth control of all working functions.
Thanks to its tracks and the possibility of mounting additional attachments, the crawler excavator is used for:
- earthmoving and excavation work
- road and infrastructure construction work
- loading bulk materials
- demolition work
- quarry and gravel pit operations
Liebherr D936 A7 engine – approximately 190 kW of power
The Liebherr D936 A7 power unit was developed specifically for applications in heavy-duty construction machinery. It is a six-cylinder diesel engine with large displacement, providing high torque even at low engine speeds. As a result, the excavator maintains smooth hydraulic performance even during intensive loading of the working systems.
The engine is characterized by high durability, low fuel consumption, and excellent resistance to operation in harsh environmental conditions. The power unit parameters allow efficient operation of systems responsible for:
- boom and arm movement
- upper structure rotation
- powering the main hydraulic pump
- machine travel and transport
Key specifications of the D936 A7 engine
| Parameter | Value |
|---|---|
| Engine model | D936 A7 |
| Power output | approximately 190 kW |
| Power in HP | approximately 258 HP |
| Torque | approximately 1250–1350 Nm |
| Rated speed | 1800 rpm |
| Fuel type | Diesel fuel |
Performance and working capabilities
The Liebherr R 946 stands out for its excellent control precision and high hydraulic efficiency. The hydraulic system used allows simultaneous execution of several working functions without loss of operational smoothness. The operator can expect fast attachment response and high breakout force, which is crucial when working in hard ground or loading heavy materials.
The machine has been adapted for long working hours under heavy loads. The robust boom structure, durable undercarriage, and efficient cooling system help maintain high reliability even in the most demanding operating conditions. Liebherr’s R series is also valued for its relatively low operating costs and long service life of hydraulic components.
Liebherr R 946 technical data
| Parameter | Value |
|---|---|
| Bucket capacity | approximately 2.0–3.0 m³ |
| Digging depth | approximately 7.5–8.5 m |
| Track width | approximately 600–750 mm |
| Drive / Travel system | Hydrostatic, crawler-type |
| Main engine / undercarriage | Liebherr D936 A7 |
| Main engine power | approximately 190 kW |
| Auxiliary engine / upper structure | Not applicable |
| Upper structure engine power | Not applicable |
| Maximum speed | approximately 5 km/h |
Applications of the crawler excavator
Crawler excavators in the Liebherr R 946 class are widely used in large-scale construction and infrastructure projects. The machine design allows easy transport between construction sites, while a wide range of compatible attachments enables adaptation to many different applications. Thanks to its high stability and strong working force, this model performs well both in the road construction sector and in the mining industry.
The machine is most commonly used for:
- performing deep excavations
- foundation work
- loading aggregates and bulk materials
- demolition of industrial facilities
- earthworks in road and highway construction
Summary
The Liebherr R 946 with the Liebherr D936 A7 engine is a modern crawler excavator designed for the most demanding applications in heavy construction. The combination of efficient hydraulics, robust construction, and a powerful engine ensures high work efficiency and reliability during multi-shift operation. It is a respected configuration chosen by companies expecting high durability, strong working performance, and low machine maintenance costs.
