VIDEO: Komatsu new-gen large production dozer reduces friction for smooth operation

A total redesign improves operator comfort, productivity, and fuel efficiency 

The D175AX-10 delivers up to 25 percent greater productivity and up to 15 percent better fuel efficiency in slot dozing compared with the previous D155AX-8. Its comprehensive redesign extends across the engine, transmission, steering system, blade, undercarriage, and operator environment, with the goal of helping crews sustain production while managing operating costs.

At the core of the D175AX-10 is Komatsu’s 12.7-litre DBA127 Tier 4 Final engine, rated at 450 net horsepower (336 kW). Developed with a streamlined EGR-less layout and improved critical components, the engine is paired with a new four-speed automatic transmission with a lock-up clutch and 30 speed settings. Together, the powertrain and selectable operating modes balance pushing performance and fuel efficiency as conditions change. Automatic Shift Mode can help reduce fuel consumption by up to 5 percent compared with manual operation.

Key features of the D175AX-10 include:

• 450 net HP Komatsu DBA127 12.7-litre Tier 4 Final EGR-less engine with 27 percent more horsepower than the previous model. 
• Hydrostatic steering with up to 17 percent greater steering force and up to 7 percent more power while turning. 
• 13.9 yd3 semi-u blade with high-efficiency end bits for reduced digging resistance and improved material retention. 
• Standard KomVision 360-degree camera system and cab with up to 45 percent better forward and 30 percent better rear visibility than the D155AX-8. 
• Redesigned undercarriage and cab isolation that can reduce vibration by up to 35 percent. 

The new hydrostatic steering system is designed to help operators maintain blade load and pushing performance while maneuvering. An independent steering pump helps balance power between steering and work equipment, while “pivot, power and spin turn” modes provide options for confined work areas and conditions. Combined with track shoe slip control and multistage speed settings, these features help operators manage traction and machine response during production dozing, ripping, and other demanding tasks.

Blade design also plays a central role in the dozer’s production capability. The 13.9 yd3 semi-u blade is shaped to reduce digging resistance while improving filling and material retention, helping operators carry material efficiently through each push. The D175AX-10 is engineered to deliver up to 18 percent greater average drawbar pull compared with the D155AX-8, supporting performance in heavy-load applications.

“This large-class machine builds on the proven foundation of the D155AX-8 with a complete redesign,” says Robert Hussey, product manager.

“From a new 450-horsepower engine and four-speed automatic transmission to an all-new steering system and redesigned semi-U blade, nearly every major system has been reengineered to help move more material with greater control. The result is a new generation of dozer engineered to deliver in four key areas: performance and productivity, ride comfort, operator features, and lower total cost of ownership.”