Remanufacturing Business - Hitachi Construction Machinery

Hitachi Construction Machinery Co., Ltd. has implemented a full-model change of the EHAC-3 rigid dump truck to develop the EHAC-5 (nominal payload of 242 t, gross machine operating weight of 427 t).

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By applying metal fabrication technologies accumulated through the manufacturing of hydraulic excavators, the company increased the durability and achieved the industry's highest payload of 242 t. After completing field tests at mining sites, the company aims to start sales of the new rigid dump truck in . Hitachi Construction Machinery plans to exhibit the EHAC-5 for the first time at MINExpo, the world’s largest mining trade show, to be held 24 – 26 September in Las Vegas.

The EHAC-5 evolved the Hitachi AC drive system cultivated through the current EH AC-3 series models and strengthened the brakes, suspension, and other aspects of the undercarriage to achieve smooth, stable driving and superior deceleration performance even under the industry’s highest payload of 242 t. In addition, it provides a comfortable operator space and operating environment which enables the operator to achieve the desired level of maneuvering performance. Furthermore, the change to a fully electric specification equipped with batteries and trolley dynamic charging systems that receive power from overhead lines installed at mines is also compatible with the EHAC-5 similar to the current EH-AC3 series models.

Primary features

Industry’s highest payload of 242t

Hitachi Construction Machinery utilised metal fabrication technologies accumulated through the manufacturing of hydraulic excavators to increase the body durability and achieved the industry’s highest payload of 242 t. The new model increases the payload by 21 t, compared to EHAC-3 and helps to increase the productivity of customer mining operations.

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Superior driving and deceleration performance

The maximum speed is an industry-leading 65 km/h. At the same time, it provides high productivity to customers with improved traction performance. In addition, it is equipped with a new feature that allows operators to select from three different driving modes (High Power Mode, Power Mode, and Eco Mode) according to the site environment. Operators can select Eco Mode when they wish to reduce fuel consumption or High Power Mode to maximise driving performance for efficient operation. In terms of the deceleration performance, the brake performance was enhanced by changing the hydraulic brakes from front dry brakes to wet brakes and enhancing the performance of the retarder auxiliary brakes. As a result, they demonstrate stable braking force even in harsh mining environments.

Improved operability and comfort

The switches and monitors in a cab were completely redesigned to improve operability and comfort. Information regarding the safety conditions around the machinery, loading conditions, etc. is displayed on the monitors to support safe and efficient operation by customers.

Consite Mine remotely monitors the status of mining machinery

The EHAC-5 is compatible with the Consite Mine service solution which remotely monitors the status of mining machinery. Consite Mine issues two types of reports consisting of “Scheduled Reports” that inform customers of the machines’ operational status via and a smartphone app and “Alarm Reports” that are issued whenever various sensors detect abnormalities in the machinery. Detecting abnormalities in the dump truck and performing maintenance, inspection, and parts replacement according to the machinery’s condition reduces downtime.

For more information, please visit Hitachi Dump Truck Parts.