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Fri April 23 2021

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Hitachi boosts fuel economy with latest excavator range

28 Oct 15 Hitachi Construction Machinery has launched three new medium excavators, which can boast a fuel saving of up to 19% compared to previous models.

The Zaxis-6 medium excavator range comes in three models – ZX350LC-6, ZX300LC-6 and  ZX250LC-6 – which range in operating weight from  25,700kg up to 36,300kg.

The excavators incorporate high-quality components such as the in-cab console, which is made of weather-resistant AES-grade resin that prevents damage from UV rays. The upper structure has high-quality sealant (around the cooling package) and acoustic materials to eliminate any deterioration caused by heat. These ensure the machine’s long-term cooling and low-noise performance.

Enlarged track guards reduce potential damage to the track link. A reconfigured lower roller ensures that mud falls out easily to prevent clogging and any subsequent damage to the oil seals. The front attachment’s durability has been enhanced by HN bushings to strengthen the brackets on the boom end and foot, and reinforced resin thrust plates on the boom.

TRIAS II technology developed by Hitachi offers exceptional efficiency by reducing total hydraulic loss. On the ZX350LC-6 model, this results in a 15% fuel saving in ECO mode (7% in PWR mode) with the same level of productivity. With the ZX250LC-6, there is a 15% fuel saving in ECO mode (14% in PWR mode). On the ZX250LC-6, the fuel saving in ECO mode is 19% (10% in PWR mode).

Another example of advanced technology is the after-treatment device that results in fewer emissions and a quieter performance. It consists of a diesel oxidation catalyst, urea mixing pipe, (selective catalytic reduction) SCR system and silencer. The SCR system injects urea into exhaust gas to reduce nitrous oxide. Pollutants are also reduced by the variable geometry turbocharger and high volume-cooled exhaust gas recirculation system.

Tilting rotator and tilting bucket modes are included within its attachment support system. These and nine other modes can be registered on the monitor for easy fitting of attachments. Two extra spools in the control valve make it easier to install attachments that require multiple, large volumes of oil and on two-piece boom models.

Hitachi's general manager engineering, Tsuyoshi Nakamura, said: “From an operator’s point of view, the Zaxis-6 range offers a comfortable working environment, is precise, intuitive and easy to manoeuvre. Low fuel consumption, as well as high controllability and productivity, make it stand out from the competition.”

Specifications

Model

ZX250LC-6/LCN-6

ZX300LC-6/LCN-6

ZX350LC-6/LCN-6

Engine rated power (ISO14396)

140 kW

197 kW

210 kW

Operating weight

25,700-28,100 kg

29,900-32,300 kg

34,200-36,300 kg

Backhoe bucket ISO heaped

0.80-1.40 m³

1.00-1.62 m³

1.15-1.86 m³

Maximum digging depth

6,960 mm (with 2.96m monoboom)

7,220 mm (with 3.1m monoboom)

7,380 mm (with 3.2m monoboom)

Bucket digging force

188 kN

202 kN

246 kN

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