HITACHI ZX850-3 CRAWLER EXCAVATOR

Technical Description

The Hitachi ZX850-3 excavator is a heavy-duty hydraulic excavator designed for high-performance earthmoving tasks. It features three boom/stick configurations to optimize operational reach and digging capacity. Option 1 offers a maximum cutting height of 39.5 ft, digging depth of 23.5 ft, and loading height of 26.7 ft. Option 2 extends reach with a cutting height of 42.8 ft and digging depth of 29.2 ft. Option 3 provides the greatest reach with a cutting height of 45.4 ft, digging depth of 31.4 ft, and a maximum reach along ground of 48.1 ft. The machine supports bucket capacities ranging from 3.8 to 5.9 cubic yards, with a reference bucket size of 4.6 cubic yards. The ZX850-3 is powered by a turbocharged engine model AH-6WG1XYSA-03 with a displacement of 957 cubic inches, delivering 460 hp at 1800 rpm and a peak torque of 1374.1 lbs-ft at 1600 rpm. It maintains efficient hydraulic performance with a pump flow capacity of 279 gpm at a system relief pressure of 4975 psi. The hydraulic fluid capacity is 208.7 gallons, supporting robust operation. Dimensionally, the excavator has a ground clearance of 3 ft, track gauge of 11.4 ft, and width of 13.5 ft outside the tracks. The length of track on ground is 15.1 ft, with a tail swing radius of 15.1 ft. Its operating weight is approximately 177,472 lbs, with travel speeds up to 2.6 mph and a ground pressure of 17.6 psi. The undercarriage comprises 47 shoes per side and 8 track rollers per side on 25.6-inch shoe size, ensuring excellent stability and maneuverability. The swing speed is 7.3 rpm, facilitated by 4-gallon swing drive fluid capacity. This model excels in large-scale excavation, loading, and trenching, supported by its significant reach and powerful hydraulics.