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The 44 ton capacity HM400-3 has a Tier 4 interim Komatsu engine which, combine with other energy saving improvements, can reduce fuel consumption up to 14%. The Komatsu Traction Control System ensures that a loaded HM400-3 will be able to pull through the most severe underfoot conditions. The operator can choose between Economy and Power modes to further tailor his machine performance to the job at hand. Among the cab improvements are a forward facing training seat and separate screen for the rear view camera.

Features & Benefits

Low fuel consumption

The fuel consumption for the HM400-3 has been lowered through energy saving improvements in the transmission, axles and advanced electronic engine control.

Komatsu Traction Control System

The new KTCS system was developed by Komatsu to allow for maximum machine performance in soft ground conditions.

Selectable Working Modes

The operator can choose between two working modes, Economy Mode or Power Mode, according to their work demand and conditions.

Economy mode

Appropriate for lighter work on flat ground. The economy modes lowers the engine maximum output along with lowering the upshift and downshift points during operation.

Power mode

Appropriate for higher production jobs and uphill hauling applications. The power mode increases the engine maximum output and raises the upshift and downshift points during operation.

KDPF Regeneration Notification

The LCD color monitor panel provides the operator with the status of the KDPF regeneration, without interfering with daily operation. When the machine initiates active regeneration an icon will appear to notify the operator.

Ground access to the filters

The oil filters of the transmission and the brake systems offer servicing from the ground.

Center-located operator seat

Placing the seat at the center of the operator’s cabin provides a wide view of the working area.


Key Specifications
Empty weight 74,207 lbs (33,660 kg)
Payload 44.1 U.S. tons (40 metric tons)
Horsepower: SAE J1995 473 HP (353 kW)
Horsepower: ISO 9249 / SAE J1349 469 HP (350 kW)
Heaped (2:1, SAE) 31.4 yd3 (24 m3)

Company Info

8770 W Bryn Mawr Ave., Suite 100
Chicago, IL
US, 60631


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