LIEBHERR R974B CRAWLER EXCAVATOR

Technical Description

The Liebherr R974B excavator is a high-performance hydraulic excavator designed for heavy-duty construction and material handling applications. It features a robust 490 hp (365 kW) D9408 TI-E engine with 8 cylinders and a displacement of 1049.7 cubic inches, operating at 1800 rpm. The machine’s operating weight without attachment is approximately 201,723 lbs, providing stable and powerful performance on-site. Its hydraulic system utilizes a variable flow swash plate pump with a capacity of 262.1 gallons per minute and a relief pressure of 4,641.3 psi, ensuring efficient and responsive control of boom and stick movements. The excavator offers flexible boom and stick configurations, including two boom/stick options: Option 1 with a shipping height of 21.4 ft and length of 54.3 ft, and Option 2 with a shipping height of 26.3 ft and length of 59.8 ft. The material handler variants feature gooseneck booms up to 14,000 mm with sticks up to 10,500 mm, enabling maximum depths from 7.3 ft to 8.6 ft, maximum heights from 7.3 ft to 8.3 ft, and maximum reach along ground between 6.9 ft and 7.9 ft. Dimensionally, the machine has a digging depth and reach of 43 ft, ground clearance of 2.2 ft, and a tail swing radius of 14.6 ft. The undercarriage width measures 11.9 ft with track gauge at 11.9 ft, and shoe size of 23.7 inches. The swing mechanism provides a speed of 5.5 rpm with torque of 191.8 lb-ft. Operating with a 338.2-gallon fuel capacity and 24-volt electrical system (80-amp alternator), the R974B maintains a maximum travel speed of 1.8 mph and a drawbar pull of over 159,600 lbs. Its engineering allows efficient excavation, demolition, and material handling tasks, supported by robust hydraulic power and stable structural design.