The John Deere 490E is a mid-size hydraulic excavator equipped with a turbocharged 4045T engine delivering 90 hp gross power and 85 hp net power at 2200 rpm, with a maximum torque of 252 lb-ft at 1300 rpm. It has a displacement of 276 cubic inches and operates on a 24-volt electrical system supported by a 45-amp alternator. The excavator features an advanced hydraulic system with a pump flow capacity of 52.3 gpm and a relief valve pressure of 4980 psi, enabling efficient performance for digging and lifting tasks. Two boom/stick configurations are available: Option 1 provides a max cutting height of 28 ft, max digging depth of 18.3 ft, max loading height of 20.1 ft, and max reach along the ground of 26.7 ft, with a vertical wall digging depth of 16.4 ft. Option 2 increases these to 29 ft, 20 ft, 21.2 ft, 28.3 ft, and 18 ft respectively. The bucket options support capacities ranging from 0.4 to 1.6 cubic yards, with a reference capacity of 0.7 cubic yards, offering flexibility for various load sizes. In terms of dimensions, the machine's shipping height and cab height are both 8.9 ft, the shipping length is 24.9 ft, ground clearance is 1.5 ft, and track width (gauge) is 6.6 ft. The undercarriage includes 44 shoes per side (27.6 in shoe size), 7 track rollers per side, and a single carrier roller per side. The excavator’s operating weight is 26,780 lbs, with a low ground pressure of 4 psi and a max travel speed of 3.4 mph. The swing mechanism operates at 11 rpm and the tail swing radius measures 7 ft, enhancing maneuverability in confined job sites. This combination of power, reach, and compact dimensions makes the John Deere 490E a versatile excavator for mid-range construction and excavation tasks.