Komatsu introduces next-gen HM460-6 articulated haul truck at CONEXPO 2026
Komatsu has introduced the HM460-6 articulated haul truck, a next-generation articulated dump truck engineered to help contractors move more material with greater consistency across challenging ground conditions, at CONEXPO-CON/AGG 2026 in Las Vegas this week.
Designed around a new high-output powertrain, an advanced traction control system and a redesigned operator environment, the HM460-6 reflects direct customer input on performance, efficiency and control in demanding applications, the OEM says.
The HM460-6 is built for quarry, construction, large-scale site development, mining and infrastructure operations where variable terrain, soft ground and haul road conditions limit productivity.
With a higher-rated payload and improved fuel efficiency compared with the Komatsu HM400-5 (which this new model replaces), the truck is designed to deliver a lower cost per tonne while maintaining stable, predictable operation throughout the haul cycle.
The increase in the truck’s rated payload capacity up to 46.3 tons, or 42 tonnes (compared to the 44.2-ton (40.1 t) capacity of the HM400-5) also allows for the opportunity for more material to be hauled in each cycle – further driving added productivity and increasing the total volume of material that can be hauled in a period of time. This has positive impacts across the truck’s total cost of ownership and the hourly cost of moving material.
At the core of the HM460-6 is the new proprietary Komatsu DBA127 engine equipped with a two-stage turbocharger system. The engine delivers 518 gross horsepower (386 kW) at 1,700 rpm, providing increased torque at lower engine speeds to support strong acceleration, improved hill-climb capability and efficient power delivery under load, Komatsu says. It also eliminates the complexity of an exhaust gas recirculation (EGR) system through a simplified design, uses less fuel and helps extend service intervals, lowering the total cost of ownership. Paired with a new nine-speed Komatsu transmission and intelligent gear control, the powertrain is designed to balance performance and fuel efficiency across a wide range of conditions.
This new truck also features the Komatsu Traction Control System, paired with cross-axle differential locks, to help maintain traction on soft, uneven or muddy ground. Combined with a hydro-pneumatic suspension system engineered to balance ride comfort and stability, the HM460-6 is designed for reliable hauling across the toughest terrain.
The DBA127 engine’s two-stage turbocharger system is designed to deliver efficient boost across a wide operating range, supporting strong low-speed torque while maintaining consistent performance at higher speeds. An electronically controlled bypass valve helps manage boost pressure, contributing to durability and smooth engine response, the company explains. The engine meets U.S. EPA Tier 4 Final and EU Stage V emissions standards and is designed with extended maintenance intervals to help reduce downtime.
Traction performance is a central focus of the HM460-6’s design. The Komatsu Traction Control System continuously monitors wheel speed and slip, automatically applying brake force to individual wheels when traction loss is detected. This system works in conjunction with an inter-axle differential lock and a manually activated cross-axle differential lock, providing operators with multiple layers of traction assistance based on ground conditions. Together, these systems are designed to help reduce tyre spin to extend tire life, limit material spillage and support steady travel on grades or soft surfaces.
The HM460-6 also features a redesigned cab focused on visibility, ergonomics and operator comfort. A four-pillar cab design increases glass area by 16% and reduces blind spots by 43% compared with the HM400-5, helping to improve awareness during loading, hauling and dumping, the company says. Control layouts were revised to group high-use functions within easy reach, and a high-resolution 8-inch machine monitor paired with a 10-inch sub-monitor provides access to payload data, machine information and rear-view camera feeds.
Standard operator-assist features include cruise control and automatic retard speed control to help maintain consistent downhill speeds, and hill start assist, designed to prevent rollback on steep grades. A rollover prevention system monitors vehicle speed and rear frame angle, providing alerts and limiting machine functions when thresholds are approached. New brake inspection guidance helps operators assess brake status.
Maintenance access is also addressed in the HM460-6 design. A powered tilting engine hood, ground-level service points and extended service intervals are intended to help reduce downtime and simplify routine inspections and scheduled maintenance. The truck is equipped with telematics data monitoring technology that enables fleet managers to access machine health and operating data, helping to improve utilisation and planning and supporting proactive maintenance, the company says.
Bruce Boebel, Director, Products and Service, said: “In engineering the HM460-6, the focus is on delivering confident performance in real-world conditions where traction, torque and control make the difference – with extra payload. The new DBA127 engine and advanced traction systems were designed to help operators stay productive on challenging and versatile terrain, while the redesigned cab and service features reflect how closely we listened to customer feedback.”
Alongside this release, Komatsu also announced that Komatsu Smart Quarry Autonomous, powered by Pronto, has been named a finalist for the CONEXPO-CON/AGG Next Level Awards, which recognise equipment and technologies that demonstrate measurable potential to advance operations. The technology awards highlight solutions that apply emerging automation and digital capabilities to real-world job site challenges, with the winner determined by votes cast during the show March 3-7. It is part of Komatsu North America’s expanding technology offering for quarry aggregate operations.
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