Advanced Electronic Control System

The engine control system has been upgraded to effectively manage a variety of parameters such as the air flow rate, EGR gas flow rate, fuel injection parameters, and after treatment functions. The new control system also provides enhanced diagnostic capabilities.

KDPF Regeneration Notification

The LCD color monitor panel provides the operator with the status of the KDPF regeneration without interfering with daily operation. When the machine initiates active regeneration, an icon will notify the operator.

Selectable Working Mode

Working mode E is for general dozing applications with adequate speed and power while reducing fuel consumption and CO2. Working mode P is aimed at powerful operation and maximum production. The working mode is easily switched on the monitor panel, depending on the work at hand.

E mode (Economy mode)

With E mode, the engine outputs enough power for most general dozing applications without delivering

unnecessary power. This mode allows for energy saving operation and is suitable for work on ground where the machine may experience shoe slip or applications not requiring large power such as downhill dozing, leveling and light-load work.

P mode (Power mode)

With P mode, the engine outputs its full power, allowing the machine to perform large production, heavy-load, or uphill work.

SIGMADOZER – The Next Generation Blade

Based on a completely new digging theory, SIGMADOZER dramatically improves dozing performance and increases productivity. A new frontal design concept adopted for digging and rolling material up at the center of the blade increases soil holding capacity while simultaneously reducing side spillage. It also reduces digging resistance, producing a smoother flow of earth, enabling the dozing of larger quantities of soil with less power.

Automatic Transmission with Lockup Torque Converter

A significant reduction in fuel consumption and greater power train efficiency are achieved by the new automatic transmission and lockup torque converter. The automatic transmission selects the optimal gear range depending on the working conditions and load placed on the machine. This means the machine is always operating at maximum efficiency. The lockup mechanism of the torque converter is automatically actuated to transfer engine power directly to the transmission in travelling and usual dozing speed ranges. Locking up the torque converter results in 10% improved drive train efficiency. Because the electronically controlled Tier 4 Interim engine is extremely efficient, an additional 5% decrease in fuel consumption is realized while also maintaining machine power.

Power Angle Tilt (PAT) Dozer

A Power Angle Tilt dozer blade with highly durable box-structure frame is available for the EX, WX and PX machines. The hydraulic blade tilt and angling functions and manually adjustable blade pitch expand versatility and productivity in a variety of applications. This PAT dozer assembly is tested to the same stringent test standards as Komatsu’s outside mounted blades.

ECO Guidance

In order to support to optimum operation, the following 5 recommendations are displayed to improve fuel saving operation:

    1) Avoid Excessive Engine Idling

    2) Use Economy Mode to Save Fuel

    3) Avoid Hydraulic Relief Pressure

    4) Avoid Overload

    5) Use Automatic Shift Mode

The operator can access the ECO guidance menu to check the Operation Records, Eco Guidance Records, and Average Fuel Consumption logs.

Rear View Monitoring System

On the large LCD color monitor, the operator can view, through one camera, areas directly behind the

machine. This camera can be synchronized with reverse operation.

Palm Command Control System PCCS Travel Joystick

Palm command travel joystick provides the operator with a relaxed posture and superb fine control. Transmission shifting is simplified with thumb push buttons.

Palm Command Proportional Pressure Control PPC Blade Control Joystick

Blade control joystick uses the PPC valve and joystick, similar to the travel control joystick. PPC control combined with the highly reliable Komatsu hydraulic system enables superb fine control. A switch is now used to angle the PAT blade.

Automatic shift mode

Select for all general dozing. When a load is applied, the transmission automatically shifts down, and when the load is off, it automatically shifts up to a set maximum gear speed. This mode economizes both fuel and production further when the torque converter lockup mechanism is actuated according to load, providing a one-to-one drive.

Manual shift mode

Select for dozing and ripping rough ground. When loaded, the transmission automatically shifts down, but does not shift up when the load is off.

Hydrostatic Steering System (HSS)—Smooth, Powerful Turning

The engine power is transmitted to both tracks without power interruption on the inside track for smooth, powerful turns. Counter-rotation is available in neutral for minimum turning radius, enhancing maneuverability.

Newly Integrated ROPS Cab

A newly designed cab; wider, deeper and taller, is integrated with the ROPS. High rigidity and superb sealing performance greatly reduce noise and vibration for the operator and minimize dust entering the cab. The standard air-ride seat positions the operator 3" higher and 4" closer to the blade. The taller and narrower battery box and tanks plus larger glass area also improve visibility of the blade, sides, and rear of the machine. Cab meets OSHA/MSHA ROPS and FOPS Level 2 standards.

New Air Suspension Seat

A new higher capacity low-back heated seat with headrest and 15° swivel is now standard.

Engine

TORQFLOW Transmission

Komatsu TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 2-phase, torque converter with lockup clutch, and a planetary gear, multiple-disc clutch transmission which is electronically controlled, hydraulically actuated and force-lubricated for optimum heat dissipation. Shift lock lever and neutral safety switch.

Steering System

Palm Command Control System (PCCS) lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to left to make a left turn. Tilt it to the right for a right turn.
Hydrostatic Steering System (HSS) is powered by steering planetary units and a hydraulic pump and motor. Counter-rotation turns are also available. Wet, multiple-disc, pedal-controlled service brakes are spring-actuated and hydraulically released. Gear shift lock lever also applies parking brake.

Undercarriage

Final Drive

Double-reduction final drive of spur and planetary gear sets to increase tractive effort and reduce gear tooth stresses for long final drive life. Segmented sprocket teeth are bolt-on for easy replacement.

Hydraulic System

Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control units:
All spool valves externally mounted beside the hydraulic tank. Piston type hydraulic pump with capacity (discharge flow) of 248 ltr/min / 65.5 U.S. gal/min at rated engine rpm.

Service Refill Capacities