Komatsu Introduces New Off-Highway Trucks

Vernon Hills, IL, September 22, 2006”Komatsu America Corp. introduces two new rigid dump trucks: the HD465-7 and HD605-7.  Designed for rock and quarry sites, both trucks increase productivity while lowering fuel consumption, provide a safer and more comfortable operator environment and offer improved durability and reliability.


The HD465-7 and HD605-7 both feature a powerful SAA6D170E-5 turbocharged, air-to-air after-cooled diesel engine that provides a maximum net output of 715 HP.  The trucks meet EPA Tier 3 and EU stage 3A emission regulations and their high performance engines are enhanced with an advanced cooling system and improved fuel pre-filters. Komatsu™s new rigid dump trucks feature environmentally friendly lead-free aluminum core radiators.


Special features of the new rigid dump trucks include:


High performance for enhanced productivity

The trucks™ superior performance engines deliver fast acceleration and high travel speeds with high horsepower per ton. High torque at low speed, impressive acceleration and low fuel-consumption ensure maximum productivity. The Komatsu designed electronically controlled countershaft transmission with K-ATOMiCS automatically selects the optimum gear according to vehicle speed, engine speed and the shift position chosen, resulting in the best gear for any operating condition.  An improved engine and transmission controller results in improved fuel consumption/performance, and new load sensing valves decrease hydraulic pressure for greater efficiency and smooth operation.  The automatic retard speed control system (ARSC) with a large capacity retarder allows operators to set downhill travel speed at a constant level. Its cooling oil temperature is always monitored, so the speed is automatically lowered if the retarder oil temperature rises.  


Improved cab design enhances operator comfort and safety

The HD465-7 and HD605-7 are both equipped with an ergonomically designed, state-of-the-art cab that offers a quiet and relaxed operator environment.  The wide spacious cabs are mounted with Komatsu™s unique viscous mounts to keep noise at a minimum and provide a low-vibration, clean operating environment and the built-in ROPS/FOPS structure provides roll-over protection. An easy to view instrument panel, electric operated left-hand window, tiltable steering wheel and low effort pedals provide for maximum operator comfort.  Adoption of an electric low-effort body dump control lever makes dumping loads much easier. The secondary foot-operated brakes actuate the front disk brakes and parking brakes. In addition, when hydraulic pressure drops below the rated level, the parking brake is automatically activated.


Durability and reliability provide easy maintenance

The trucks™ fully hydraulic controlled wet multiple-disc brakes ensure reliable and stable brake performance. The continuously cooled wet-multiple disc brakes also function as a highly responsive retarder which gives the operator greater confidence at higher downhill travel speeds. Wet disc brakes are fully sealed to keep contaminants out, reducing wear and maintenance. Because the brakes don™t require adjustments for wear, maintenance is extremely low. The braking system is designed with added reliability with three independent hydraulic circuits that provide hydraulic back-up should one of the circuits fail.


Both the service filters and greasing points have been centralized for easier servicing. To minimize operating costs, oil change intervals have also been extended to 500 hours for engine oil and 4000 hours for hydraulic oil.  Flange-type tire rims make removal and installation of the trucks™ tires easy. Komatsu™s advanced onboard diagnostic system maximizes machine production time by identifying maintenance items, reducing diagnostic times, indicating oil and filter replacement hours and displaying abnormality codes.


Both trucks are available with Komatsu™s optional Vehicle Health Monitoring System (VHMS).  The VHMS provides the means to monitor the health of major components on large machines, enabling the remote evaluation of the machine™s condition and operations.  This system has been designed to reduce repair costs and maintain optimal machine availability by helping to prevent unscheduled downtime.


The VHMS system enables downloaded machine data to be transmitted via the Internet and reviewed by Komatsu and Distributor service personnel.  In most regions, data is also transmitted by Orbcomm satellites for added convenience and faster response time.


VHMS reports vital information in several areas.  The operating conditions of machines and their service meters can be monitored.  Trends, when graphically displayed as change-over-time, enable remedial action before breakdowns occur.  Fault and event codes that are displayed on the machine™s monitor panel are recorded for future reference.  Other data types include engine performance, real-time fault analysis, and machine operation history


Komatsu America Corp. is a U.S. subsidiary of Komatsu Ltd. which is the world™s second largest manufacturer and supplier of construction, mining and compact construction equipment.  Through its distributor network, Komatsu offers a state-of-the-art parts and service program to support the equipment. Komatsu has proudly been providing high-quality reliable products for nearly a century.  Visit the website at for more information.

Visit our Komatsu dealer HERE.

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