Komatsu HM400-5

Description

The Komatsu HM400-5 is an articulated dump truck in the 40-tonne class, built for hauling soil and blasted rock on large construction sites, in quarries and in open-pit operations. The designation HM400 refers to Komatsu’s HM400 series of articulated dump trucks, where -5 indicates the model generation.

The rated payload is 40 tonnes, and the body holds 24 m³ heaped (SAE 2:1) and 18.2 m³ struck. Empty weight is approx. 35,055 kg and gross vehicle weight approx. 75,135 kg, with a maximum travel speed of 56 km/h. Komatsu states a loading height of 3,165 mm for easier loading. See the full specifications on the supplier’s product page, and browse more machines in Hesselberg’s dump truck category.

The truck is powered by a Komatsu SAA6D140E-7, a 6-cylinder, turbocharged common rail diesel engine of 15.24 litres. It delivers 353 kW (473 hp) at 2,000 rpm (gross, ISO 14396), or 348 kW (466 hp) net (ISO 9249), with a maximum torque of 2,257 Nm. It complies with EU Stage V using a diesel particulate filter (KDPF) and an SCR system with AdBlue, and Komatsu states that NOx emissions are reduced by 80% compared with EU Stage IIIB engines. According to the specification sheet, the engine is compatible with B20 biodiesel and can run on paraffinic fuel (HVO, GTL, BTL) in accordance with EN 15940:2016. The transmission is a fully automatic gearbox with 6 forward and 2 reverse speeds, controlled by Komatsu’s K-ATOMiCS with automatic clutch modulation. The operator can choose between Power and Economy modes, and idle shutdown can be programmed from 5 to 60 minutes.

The HM400-5 has full-time all-wheel drive with the Komatsu Traction Control System (KTCS). Komatsu states that the system automatically engages the inter-axle differential lock when slip is detected, and that the slipping wheel is braked individually if slip persists. The brakes are full-hydraulic, oil-cooled multiple-disc brakes, and the front and centre axle brakes also act as the retarder with a continuous descent capacity of 510 kW (684 hp). Automatic retarder with acceleration control (ARAC) is standard. Suspension is hydro-pneumatic at the front and a combination of hydro-pneumatic and rubber suspension at the rear. The machine articulates 45° in each direction and has a minimum turning radius (wall to wall) of 8.89 m. Standard tyres are 29.5 R25, and 875/65 R29 is available as an option. The body is made of high-tensile-strength steel, and exhaust heating is standard. A body without exhaust heating, a body liner, a tailgate and a 200 mm side extension are available as options.

The cab (Komatsu SpaceCab) complies with ROPS to ISO 3471 and FOPS to ISO 3449, and the noise level at the operator’s ear is 72 dB(A) (ISO 6396). It has an air-suspended, adjustable operator seat, a trainer seat, a tilting and telescopic steering column, air conditioning, an electrically heated rear window and a large TFT colour monitor with Eco guidance. A rear-view camera with monitor is standard, supplemented by mirrors for better visibility around the machine. Safety equipment includes automatic supplementary steering, a side inclination caution alarm, an emergency engine stop switch and a steering joint locking assembly. Cab access is positioned away from the potentially hazardous articulation.

For daily maintenance, the HM400-5 has an electrically tilting cab (27° rearward) for easy access to the engine and transmission, and Komatsu states that the transmission oil filters and brake systems can be serviced from ground level. The AdBlue tank is installed next to the fuel tank, and the radiator is easily cleaned with a hydraulically driven, reversible fan. Centralised greasing is standard, and the brakes run in an oil bath, which Komatsu states gives a long overhaul period. Komtrax, Komatsu’s wireless monitoring system with 4G communication, is standard, and a payload meter (PLM) and a fuel tank with fast fill coupler are available as options.

The HM400-5 is larger than the HM300-5 (248 kW / 332 hp, 28 t payload). If you need a rigid dump truck in the same class, see the HD405-8 (386 kW / 518 hp, 40 t payload).

As a Komatsu supplier in Norway, Hesselberg helps you with machine selection, service and parts. Contact us for a no-obligation quote on the HM400-5.