The Caterpillar 311D LRR is a compact hydraulic excavator powered by a Cat C4.2 ACERT engine delivering 80 horsepower and 60 kilowatts of net power. This machine weighs 27,514 pounds with long undercarriage configuration and features three boom/stick options to accommodate varied working requirements. The primary excavator option achieves a maximum cutting height of 26.7 feet, digging depth of 18.4 feet, and ground reach of 26.6 feet, with vertical wall digging capabilities extending to 16.4 feet. The hydraulic system operates at maximum pressures of 5,076 psi for travel, 4,424 psi for implements, and 3,336 psi for swing operations, with a main implement flow capacity of 30.9 gallons per minute. The bucket accommodates capacities ranging from 0.4 to 1.0 cubic yards, providing flexibility for diverse excavation tasks. Dimensionally, the unit features a ground clearance of 1.5 feet, cab height of 9.1 feet, track width of 8.5 feet, and transport length of approximately 22.7 feet. The undercarriage delivers a maximum drawbar pull of 25,628 pounds with ground pressure of 5 psi and travel speed of 3.1 miles per hour. Operating fluid capacities include 55.5 gallons of fuel, 38.4 gallons of hydraulic fluid, and 5.1 gallons of engine oil. The 311D LRR meets EPA Tier 3 emissions standards and is equipped with cab and FOGS meeting SAE J1356 FEB88/ISO 10262 specifications.