Coal Age

APR 2019

Coal Age Magazine - For more than 100 years, Coal Age has been the magazine that readers can trust for guidance and insight on this important industry.

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Page 43 of 51

42 April 2019 product news Hitachi Introduces the EX-7 Mining Excavators Hitachi recently announced the EX2600-7 and EX5600-7 mining ex- cavators, which will deliver enhanced efficiency, reliability and durability, the company explained. These models are part of the new EX-7 Series line of min- ing excavators, which highlights Hita- chi's focus on continuous improvement through fuel-efficiency technologies and advanced engineering. "The EX-7 Series takes Hitachi's mining machines to the next level," said Brian Mace, mining product marketing and applications manag- er, Hitachi Construction Machinery, Americas. "The combination of fu- el-saving features on the EX2600-7 and EX5600-7 will help improve our customers' efficiency while helping them maintain the same productivity levels they have come to expect from the EX-6 Series mining excavators." Within the EX2600-7 and EX5600- 7, Hitachi's Fuel Consumption Opti- mization (FCO) technologies reduce fuel consumption up to 8% to 10% versus the previous models (EX2600- 6 and EX5600-6) through engine op- tions and hydraulic system improve- ments. Customers can choose from a Cummins or MTU Environmental Protection Agency (EPA) Final Tier 4 engine option. For non-regulat- ed countries, customers can choose from a Cummins or MTU engine op- tion that features fuel-calibration op- timization settings that contribute to improved efficiency. Improved hydraulic efficiency in- cludes main pump electric regulators, which were previously controlled by a hydraulic pilot system, and a reduc- tion in the mechanical workload to power the hydraulic pilot system. The EX2600-7 and EX5600-7 also reduce the power consumption with a boom lower-circuit regeneration and a large hydraulic oil cooler and fan, which can operate at a lower speed to main- tain optimal oil temperature. The new EX-7 Series machines also offer increased reliability with cylinder stroke end control, which helps en- sure structural longevity and operator comfort by using angle sensors to help reduce the cylinder pump flow rate for smoother and slower movement. Acting on customer input, Hitachi also rearranged the hydraulic hoses from an arched to an underslung con- figuration, which makes the hoses less prone to deflection due to decreased hose load. Contamination sensors in each main pump help reduce the risk of machine faults and costly downtime by detecting excessive contamination and alerting the operator when needed. The new machines also offer fea- tures that strengthen their durability. A pressurized cab bed improves the life of electrical components and controllers by using an air filter to keep out dust and debris. Maintenance is also reduced with a greaseless center joint that utiliz- es available hydraulic oil for lubrication rather than needing grease lubrication. Operator comfort and safety is also enhanced with a best-in-class operation station that offers increased visibility and comfort with ergonom- ically designed controls to help in- crease productivity. Additionally, an advanced multi-display monitor helps improve the machine's performance and uptime by providing more accu- rate operating status information. The EX-7 Series also provides the option of AerialAngle, which is popular among miners and works as a 360° vision system. The system assists with noting equipment surroundings through a dis- play monitor that combines a set of im- ages captured by cameras positioned at different locations around the machine. The EX2600-7 and EX5600-7 are now available for the United States, Ca- nadian, Latin American and Brazilian markets. The Japanese manufacturer The new EX5600-7 is engineered with Fuel Consumption Optimization (FCO) technologies, which contribute to improved efficiency.

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