The Kato HD820III is a high-performance, fully hydraulic crawler excavator engineered for demanding construction and excavation tasks. With a net engine power of 147.6 hp (110 kW) delivered by a turbocharged C 6D34-TLE2A diesel engine, this machine provides robust performance and reliability. The excavator features a double variable piston pump and gear pump system, ensuring efficient hydraulic operation with a maximum pump flow capacity of 124.2 gpm and a system relief valve pressure of 4771.8 psi. The operating weight is 42,990.2 lbs, supported by a durable undercarriage with 46 shoes per side, each measuring 23.7 inches, and a track gauge of 7.3 feet, resulting in a ground pressure of 6.3 psi for excellent stability on various terrains. The HD820III offers multiple boom and stick configurations, with maximum cutting heights ranging from 30.5 ft to 33.5 ft, digging depths from 18.7 ft to 25.3 ft, loading heights from 21 ft to 23.9 ft, and maximum reach along the ground from 29 ft to 35 ft. The bucket capacity ranges from 0.6 to 1.5 cubic yards, with a reference capacity of 1.1 cubic yards. The machine is equipped with advanced features such as an APC system, digging force booster, swing shockless valve, and a comfortable operator cabin with climate control. The swing speed is 13.5 rpm, and the maximum travel speed is 3.5 mph (5 kph). The HD820III also includes a 24-volt electrical system, a 35-amp alternator, and generous fluid capacities for cooling, engine oil, fuel, and hydraulic systems, ensuring extended operational periods with minimal downtime.