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November 9, 2026 -- Komatsu North America today introduced the D175AX-10, a completely redesigned production dozer engineered to help move more material, improve efficiency and reduce total cost of ownership across a wide range of applications, from aggregates production and mining to large-scale site development (such as large-acreage residential, commercial and data center developments). With a new 450 net horsepower Komatsu DBA127 engine, redesigned powertrain and blade and a hydrostatic steering system designed for pushing performance while turning, the D175AX-10 brings together performance, control and durability for demanding earthmoving applications.
The D175AX-10 delivers up to 25% greater productivity and up to 15% 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-liter 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% compared with manual operation.
Key features of the D175AX-10 include:
- 450 net HP Komatsu DBA127 12.7-liter Tier 4 Final EGR-less engine with 27% more horsepower than the previous model
- Hydrostatic steering with up to 17% greater steering force and up to 7% 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% better forward and 30% better rear visibility than the D155AX-8
- Redesigned undercarriage and cab isolation that can reduce vibration by up to 35%
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% greater average drawbar pull compared with the D155AX-8, supporting performance in heavy-load applications.
The redesigned operator environment supports comfort, visibility and confident machine control throughout long shifts. Undercarriage updates include a redesigned 8-track roller system that allows more track on the ground, front oscillating idlers that help maintain constant track-on-ground contact over uneven terrain and an increased minor bogie oscillation angle that helps reduce vibration and operator fatigue. The cab also features an 8-inch touchscreen monitor, intuitive Palm Command Control System levers and a standard KomVision 360-degree camera system with a 10-inch display
Because uptime and longevity matter, this dozer features ground-level service points, a side-by-side cooling package and maintenance improvements to help reduce downtime and maintenance costs by up to 28% over the life of the machine, thanks to the EGR-less DBA127 engine and compatibility with ultra-low ash (ULA) oil. Hydraulic oil and filter service intervals increase from 2,000 to 6,000 hours, and engine oil and key filter intervals increase from 500 to 1,000 hours. KDPF cleaning is extended to up to 8,000 hours. The DBA127 has been successfully introduced in other recent major Komatsu product launches such as the HM460-6 articulated haul truck, as well as the WA475-11 and WA485-11 wheel loaders. The redesigned blade linkage and strengthened structures are also intended to support longer component life in demanding 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.”
About Komatsu
Komatsu develops and supplies technologies, equipment and services for the construction, mining, forklift, industrial and forestry markets. For more than a century, the company has been creating value for its customers through manufacturing and technology innovation, partnering with others to empower a sustainable future where people, business and the planet thrive together. Front-line industries worldwide use Komatsu solutions to develop modern infrastructure, extract fundamental minerals, manage forests and create consumer products. The company's global service and distributor networks support customer operations to help enhance safety and promote productivity while working to optimize performance.
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