LIEBHERR R974C LITRONIC CRAWLER EXCAVATOR

Technical Description

The Liebherr R974C Litronic is a heavy-duty hydraulic crawler excavator engineered for efficiency and high performance in demanding earthmoving and demolition tasks. Powered by the Liebherr D9508 8-cylinder V-engine, it delivers a robust net power output of 400 kW (536 hp) at 1,800 RPM, optimized with common-rail injection, turbocharging, and aftercooling to meet Stage IIIA/Tier 3 emission standards. The 16.16-liter displacement engine ensures powerful torque and fuel-efficient operation within a water-cooled system utilizing a dry-type air cleaner with pre-cleaner stages for enhanced engine longevity. With an operating weight ranging from approximately 85 to 106 metric tons depending on attachments (backhoe or shovel), the R974C Litronic features versatile bucket capacities from 2.2 to 6.2 cubic meters and shovel capacities between 4.4 and 6.5 cubic meters, suitable for handling a wide range of materials. Its hydraulic system operates at a maximum pressure of 350 bar with a flow rate up to 315 l/min, supported by a 745-liter hydraulic tank and multiple full-flow and fine filters to maintain system integrity. The excavator achieves travel speeds up to 4.4 km/h via Liebherr planetary planetary reduction gear transmissions driving integrated swash plate motors with safety brake valves. It offers strong digging and breakout forces, with ISO breakout force around 445 kN and digging force near 357 kN depending on configuration. The machine's structure enables significant reach and lift capacities with gooseneck boom options and optimized undercarriage for stability, featuring 600 mm wide double-grouser tracks providing ground pressure as low as 1.06 kg/cm². Additional features include a ROPS-certified operator cab for safety and visibility, advanced Litronic electronic monitoring and control systems for precision handling, and modular hydraulic controls catering to auxiliary tools. This makes the R974C Litronic well-suited for heavy excavation, demolition, and material handling operations demanding reliability, power, and operational flexibility.