Komatsu’s Two New Models Feature 715 hp Engines

Wed August 30, 2006 - National Edition

Komatsu America Corp. has introduced two new dump trucks: the HD465-7 and HD605-7.

The HD465-7 and HD605-7 both feature a SAA6D170E-5 turbocharged, air-to-air after-cooled diesel engine that provides a maximum net output of 715 hp.

The trucks meet EPA Tier III and EU stage 3A emission regulations and their engines are enhanced with an advanced cooling system and fuel pre-filters. Komatsu’s new 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’ engines deliver fast acceleration and high travel speeds with high horsepower per ton. 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.

An improved engine and transmission controller results in improved fuel consumption/performance, and new load sensing valves decrease hydraulic pressure.

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 for operator comfort and safety

The HD465-7 and HD605-7 are equipped with an ergonomically designed cab that offers a quiet and relaxed operator environment. The spacious cabs are mounted with Komatsu’s viscous mounts to keep noise at a minimum and provide a low-vibration, clean operating environment. 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 operator comfort.

Adoption of an electric low-effort body dump control lever makes dumping loads 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.

• Easy maintenance

The trucks’ fully hydraulic-controlled wet multiple-disc brakes ensure stable brake performance.

The continuously cooled wet-multiple disc brakes also function as a highly responsive retarder, which gives the operator control at high downhill travel speeds.

Wet disc brakes are fully sealed to keep contaminants out, reducing wear and maintenance.

The braking system is designed 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 also have been extended to 500 hours for engine oil and 4,000 hours for hydraulic oil.

Flange-type tire rims make removal and installation of the trucks’ tires easy. Komatsu’s advanced onboard diagnostic system identifies 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.

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 also is 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.

For more information, visit