New Stage IV-compliant bulldozer from Marubeni-Komatsu
Latest D155AX-8 crawler dozer offers high levels of performance, operator comfort and fuel efficiency
MARUBENI-Komatsu have launched their new D155AX-8 bulldozer with specially engineered features that enhance performance, operator comfort, fuel efficiency and serviceability.
The latest dozer is powered by a Komatsu SAA6D140E-7 engine, which meets Stage IV emissions standards and delivers 354hp. The Japanese firm’s Stage IV engines are built on the strength of its proven Stage IIIB foundation. By integrating selective catalyst reduction, the Stage IV engine is said to further reduce NOx emissions by using diesel exhaust fluid.
The D155AX-8 dozer uses an advanced electronic control system to manage the engine’s airflow rate, fuel injection and combustion parameters. These after-treatment functions, say Komatsu, help to optimize performance, reduce emissions and provide advanced diagnostic capability, resulting in lower fuel consumption without compromising performance.
The machine is equipped with Komatsu’s Sigmadozer blade, which provides a high blade capacity of 9.4 cubic metres, enhancing performance and increasing productivity by up to 15% over a conventional semi-u blade. The patented blade features a frontal design concept for digging and rolling material at the center of the attachment. Soil-holding capacity has also increased and digging resistance is reduced for a smoother flow of material.
A key contributing factor to the dozer’s improved fuel economy is the use of an automatic gearshift transmission and lock-up torque converter that reduces fuel consumption by up to 10%. The machine also includes: an electronic power train system; hydrostatic steering; and a K-bogie undercarriage that keeps the correct alignment between the rollers and links for a smoother ride, as well as providing longer component life.
The larger cab on the dozer provides a more comfortable and quieter working environment, thanks to the use of cab mounts to reduce shocks/vibration, a high-capacity air-suspension seat, Komatsu’s ergonomic ‘palm command control system’ and a new auto-return function on the ripper control joystick.
