Komatsu HD785-8

Description

The Komatsu HD785-8 is a rigid dump truck in the 92-tonne class, developed for high-volume hauling in mines, quarries and large construction projects. The designation HD785 refers to Komatsu’s HD785 series of rigid dump trucks, where -8 indicates the model generation.

The rated payload is 92.2 tonnes, and the body holds 60.0 m³ heaped (SAE 2:1) and 40.0 m³ struck. Empty weight is approx. 73,800 kg and gross vehicle weight approx. 166,000 kg, with a maximum travel speed of 65 km/h. 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 SAA12V140E-7, a 12-cylinder, turbocharged common rail diesel engine of 30.48 litres. It delivers 895 kW (1,200 hp) at 1,900 rpm (gross, ISO 14396), or 849 kW (1,140 hp) net (ISO 9249), and complies with EU Stage V. Komatsu states that the diesel particulate filter (KDPF) captures more than 90% of particulate matter, and the specification sheet lists paraffinic fuel capability (HVO, GTL, BTL) in accordance with EN 15940:2016. The transmission is a fully automatic planetary type with 7 forward and 2 reverse speeds, controlled by Komatsu’s K-ATOMiCS with automatic clutch modulation. The skip-shift function selects a gear based on the slope when driving uphill without shifting down through every gear, and engine power can be selected between Power and Economy modes.

The brakes are full-hydraulic, oil-cooled multiple-disc brakes at the front and rear, which also act as the retarder with a continuous capacity of 1,320 kW (1,770 hp). Komatsu states that the retarding force is shared between all four wheels for stable downhill travel, and Auto Retard Speed Control (ARSC) lets the operator set a constant downhill speed. The Komatsu Traction Control System (KTCS) monitors wheel slip on the rear wheels and applies the brake automatically when needed. Suspension consists of MacPherson strut front suspension and a four-link rear axle suspension, both with hydropneumatic cylinders. The minimum turning radius is 10.1 m (centre of front tyre), and the tyre size is 27.00 R49. The body is made of high-tensile-strength steel with a V-shape design, and body exhaust heating is standard.

The cab (Komatsu SpaceCab) complies with ROPS to ISO 3471 and FOPS to ISO 3449 level II, and the noise level at the operator’s ear is 72 dB(A). The operator seat is air-suspended with heating and ventilation, and the machine also has a trainer seat, a large LCD colour monitor, air conditioning and a radio with USB and Bluetooth. Safety equipment includes the KomVision surround view system with six cameras, a rear-view camera, a pedal-operated secondary brake, automatic secondary steering, full LED lighting and overrun and overturn warning systems. Lockable battery and starter disconnect switches are standard, and an antilock brake system (ABS) is available as an option.

For daily maintenance, the HD785-8 has a service centre for fast oil and coolant refill, and greasing points and filters are centralised and reachable from ground level. Service intervals are 500 hours for engine oil, 1,000 hours for transmission oil and 4,000 hours for hydraulic oil. The radiator is modular with a reversible fan that blows out dust. Komtrax Plus, Komatsu’s wireless monitoring system, is listed as standard equipment and provides remote monitoring of machine condition and operation.

The HD785-8 sits between the smaller rigid dump trucks and Komatsu’s electric mining trucks. If you need something smaller, the HD605-10 (610 kW / 818 hp, 64 t payload) is an alternative, and for even greater capacity, see the electric mining truck 730E-10.

As a Komatsu supplier in Norway, Hesselberg helps you with machine selection, service and parts. Contact us for a no-obligation quote on the HD785-8.