Hitachi Construction Machinery (HCM) announces that sales of the EH4000ACII rigid dump truck (Gross Machine Weight 384 tons, 222-ton nominal payload) for international use in large-scale mining, will commence November 1, 2010.
The Hitachi EH3500ACII model, released on September 2008 has been operating at sites in Australia, Africa, North Europe, North America, and CIS countries. The highest hour EH3500ACII exceeds 13,000 operating hours with total hours for this model line, exceeding 160,000 hours, and customer evaluations indicating superior ability in truck acceleration and retardation bringing higher productivity.
The EH4000ACII utilizes AC drive system technology provided by Hitachi, Ltd. like the EH3500ACII it uses Insulated Gate Bipolar Transistor’s (IGBT’s) with the power up, based on the inverter technology used in high-speed railway trains.
Power transfer to the road is more efficient using the AC drive system. By eliminating heavy rotating components as found in the mechanically driven trucks, such as the transmission, torque converter and differential more of the power supplied by the diesel engine is transferred to the haul-road, impacting maintenance costs in the form of reduced labor, parts and production downtime.
Hitachi’s brushless AC travel motors and IGBT inverters reduce repair costs and deliver stronger, more controllable electric braking power (retarding) compared to the predecessor, the EH4000 DC truck.
The EH4000AC II is powered by a Cummins QSKTA60-CE engine that is known for extended service life and fuel efficiency. This engine has been certified to the Tier 2 (U.S.) EPA Emission regulation.
The EH4000AC II includes the following features: