HITACHI ZX870R-3 CRAWLER EXCAVATOR

Technical Description

The Hitachi ZX870R-3 is a large-scale hydraulic excavator engineered for demanding earthmoving and material handling applications. Powered by a turbocharged Isuzu AH-6WG1XYSA-03 six-cylinder engine, this machine delivers 532 horsepower and 1,659.6 foot-pounds of torque at 1,600 rpm, providing exceptional digging force and productivity. With an operating weight of 184,307 pounds, the excavator features robust construction designed for stability and durability in heavy-duty operations. The machine offers three boom and stick configurations, providing operators with versatility to optimize performance for specific tasks. The largest configuration achieves a maximum digging depth of 29.2 feet, a reach along ground of 45.4 feet, and a maximum vertical wall digging depth of 22.5 feet, enabling access to challenging excavation areas. The reference bucket capacity of 4.6 cubic yards accommodates substantial material volumes per cycle. Key operational specifications include a 295.9-gallon fuel capacity supporting extended working hours, a 279-gallon-per-minute hydraulic pump flow rate, and a hydraulic system relief pressure of 4,974.8 psi, ensuring powerful and responsive hydraulic performance. The undercarriage is engineered with 47 shoes per side, eight track rollers, and three carrier rollers per side, delivering superior traction and distributing ground pressure at 18.2 psi for minimal surface disturbance. With a maximum travel speed of 2.6 mph and a 7.3 rpm swing speed, the ZX870R-3 combines mobility with precision control, making it suitable for mining, quarrying, heavy construction, and demolition projects requiring reliable, high-performance excavation capabilities.