PRESS RELEASE: The HD405-8 is powered by the Komatsu SAA6D140E-7 engine rated at 383kW, while the HD605-8 is powered by the SAA6D170E-7 rated at 540kW; the Tier 4 engines can reduce fuel consumption by up to 7% compared with previous models.

The HD605-8's engine doesn't require the use of selective catalytic reduction (SCR) or diesel exhaust fluid (DEF/AdBlue) to achieve Tier 4 emissions standards, which reduce both NOx and PM emissions by 90%, compared with their Tier 3 engine equivalents.

Both engines incorporate an advanced Komatsu electronic control system that performs high-speed processing of all signals from sensors installed in the vehicle, providing total control of equipment in all conditions of use.

Engine condition information is displayed via an on-board network to the monitor inside the cab, providing all necessary operating data to the operator.

Additionally, this data can be accessed and managed via the KOMTRAX telematics remote-monitoring system, ensuring owners and fleet managers stay well on top of all maintenance requirements.

Designed for quarry, construction and smaller-scale mining operations, both trucks also feature the Komatsu Traction Control System (KTCS) to provide optimum traction in all ground conditions - as well as including Komatsu's Automatic Retard Speed Control (ARSC) system offering control over downhill travel speeds, even when fully loaded on steep haul roads.

According to Richard Feehely, Komatsu Australia's national business manager, quarries, both new trucks have been designed to deliver the safest, most productive and cost-efficient operation across a wide range of operating conditions.

"Operators have unmatched control and safety in even the most difficult operating conditions, through our integrated transmission and braking system - which is recognised as being the best in the industry," he said.

In addition to the increased fuel efficiency of the new Komatsu Tier 4 engines, fuel consumption is further reduced by a range of energy-saving features, including an ‘ecology guidance' function for the operator, auto-idle shutdown system, power and economy operating modes, and enhanced integrated of the hydraulics and transmission systems to reduce parasitic power losses.

Both trucks also incorporate payload meters (PLMs) that display payload data in the cab, as well as reporting to KOMTRAX, to ensure optimum loads for maximum productivity and to assist in analysing production rates and working conditions.

"Our 40 and 60 tonne class trucks have built a reputation over many years for being the safest, most cost-efficient and productive trucks available; these two new-generation Tier 4 trucks will further build on this, with their ultra-low emissions, even lower fuel consumption, and detailed data capture through on-board monitoring and KOMTRAX," said Feehely.