New Komatsu Crawler Dozer Powered by Cutting-Edge Blade

Wed July 26, 2006 - National Edition
Construction Equipment Guide

Komatsu America Corp. has introduced its new D155AX-6 crawler dozer.

Developed primarily for both ripping and dozing operations, the new machine combines the Sigmadozer blade with a new automatic transmission.

Komatsu’s new crawler dozer has an operating weight of 87,100 lb. (39,507 kg) and features a SAA6D140E-5 turbocharged, after-cooled diesel engine that provides a maximum net output of 354 hp (264 kW).

The new engine meets both EPA Tier III and EU stage 3A emission regulations.

The new dozer is equipped with the latest Komtrax technology, which sends machine operating information to a secure Web site using wireless technology.

Hour meter, location, cautions and maintenance alerts are relayed to the Web application for analysis.

The Komtrax fleet monitoring system increases machine availability, reduces the risk of machine theft, allows for remote diagnosis by the distributor, and provides a wealth of other information.

Special features of the new crawler dozer include:

• A Sigmadozer blade that provides the machine with a high blade capacity of 12.3 cu. yd. (9.4 cu m).

The blade features a new frontal design concept adopted for digging and rolling material at the center of the blade.

The new blade increases soil holding capacity and eliminates sideway spillage. Digging resistance is reduced for a smoother flow of material so larger amounts of soil can be dozed with less power.

A new blade linkage system holds the blade closer to the tractor for improved visibility, while enhancing digging force and reducing lateral sway of the blade.

• New automatic transmission significantly improves fuel economy.

The D155AX-6 has a new automatic gearshift transmission and lock up torque converter that reduces fuel consumption and offers greater power train efficiency.

The lockup mechanics of the torque converter automatically transfers engine power directly to the transmission, decreasing fuel consumption by 10 percent.

Because of the efficiency of the electronically controlled engine and transmission, fuel consumption is decreased while machine power is maintained.

Two gearshift modes — automatic and manual — can be easily selected to fit the appropriate application: automatic for general dozing and manual for dozing and ripping rough ground.

The automatic gearshift transmission shifts to the optimal gear range based on the working conditions and load placed.

• Newly designed joystick controls for power and comfort.

Komatsu’s new Palm Command Control System (PCCS) gives operators maximum control.

Thumb push buttons simplify transmission gear shifting.

Engine speed is controlled using an electronic throttle control dial, which eliminates maintenance of linkage and joints.

• Electronic control powertrain for smooth operation.

Powerful turns under various work conditions are achieved with the Hydrostatic Steering System (HSS), which is driven by an independent hydraulic pump and motor to transmit power to both tracks without interruption.

Counter-rotation is available for minimum turning radius.

When operating in adverse conditions such as uneven ground, a K-bogie undercarriage system keeps the correct alignment between the rollers and links.

• New cab design creates optimal operator environment.

The D155AX-6 crawler dozer’s comfortable working environment allows the operator to concentrate on the work at hand.

The larger cab is now integrated with ROPS (roll-over protection) for side visibility.

The dozer’s cab mounts reduce shocks and vibration, even over adverse conditions, and the interior cab decibel has been decreased to 75db.

A new, large color 7 in. LCD monitor in the cab displays all machine information. This new smart monitor displays the information in 10 different languages providing exceptional global support.

Rear visibility is improved during ripping applications because of the newly-designed ripper.

For more information, visit

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