Both the canopy model and the cabin model of this excavator have the same engines. Hitachi's EX30 is fitted with an Isuzu model 3KR2 engine. This Isuzu engine is a four-cycle, water-cooled engine that features three total cylinders. The piston displacement on this diesel engine is 86.7 cubic inches. Fuel is fed to this Isuzu engine through a direct fuel injection system. Bore and stroke on the Hitachi EX30 excavator is 3.2 by 3.6 inches. With the engine running at 1,800 rotations per minute, this engine produces a maximum 69.4 foot-pounds torque.
Not including height, both canopy and cabin models of this excavator are manufactured to the same dimensions. The boom equipped on these excavators is 7 ft. 10 in. in length. This boom is attached to a 4 ft. 2 in. arm. Both the canopy model and the cabin model are 5 feet wide. The canopy model is 7 ft. 9 in. tall from the ground to the top of the canopy while the cabin model is 7 ft. 11 in. tall to the top of the cabin. With the excavator's arm retracted, these machines are 15 ft. 4 in. long. Maximum dig depth offered by both models is 9 ft. 5 in. and maximum reachable height is 15 ft. 5 in. From the axis of rotation, this excavator can reach out to a length of 15 ft. 9 in.
The fuel tank fitted into the Hitachi EX30 excavator has the capacity to hold a total of 13.2 gallons of diesel fuel. This excavator is designed to hold a maximum 1.3 gallons of engine coolant and 1.5 gallons of engine oil. The hydraulic system designed for this excavator can hold a total of 10.5 gallons of hydraulic fluid. In "high" gear, this excavator can travel at a maximum speed of 2.61 miles per hour. Hitachi's EX30 can travel at a maximum speed of 1.86 miles per hour in "low" gear. The standard bucket fitted onto this excavator can scoop up a maximum 0.12 cubic-yards of heaped material.