The Caterpillar 320E LRR is a mid-sized hydraulic excavator engineered for versatile earthmoving and construction applications. Powered by a Cat C6.6 ACERT turbocharged diesel engine, it delivers 153 net horsepower and 164 gross horsepower at standard ratings, with a displacement of 403 cubic inches and bore/stroke dimensions of 4.1 by 5 inches. The engine meets EPA Tier 4 Interim and EU Stage IIIB emissions standards, enabling operation on ultra-low-sulfur diesel fuel and biodiesel blends. The machine features a robust two-pump hydraulic system with a maximum main flow of 428 liters per minute and equipment pressures reaching 5,076 psi under normal conditions. The boom cylinder measures 4.7 inches in bore with a 49.6-inch stroke, while the stick cylinder offers 5.5 inches bore and 59.2-inch stroke for enhanced digging capability. Maximum drawbar pull reaches 46,086 pounds, with swing speeds of 11.2 rpm and swing torque rated at 45,581 foot-pounds. Operating at minimum weight of 52,250 pounds and maximum of 56,440 pounds, the excavator maintains a compact footprint with 14.7 feet track length, 9.8 feet cab height, and 7.9 feet ground clearance. The long undercarriage configuration includes 49 shoes per side, 8 track rollers, and 2 carrier rollers for enhanced stability and reduced ground pressure. Fuel capacity stands at 76.6 gallons, while the hydraulic system holds 54.2 gallons. Maximum travel speed reaches 3.5 mph, providing efficient mobility across job sites with professional-grade digging and loading performance.