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5

Advanced Hydraulic Technologies

Increased Digging Force

6% more bucket digging force*.

* At power boost mode / vs. Conventional model

Enhanced Boom Recirculation System

In combined operation of boom lower and arm, arm speed can be increased by approximately 15% over the conventional. Pressurized oil from boom cylinder bottom side is delivered to boom cylinder rod side to lower the boom, assisted by boom weight. Conventionally, pressurized oil from pump is delivered to boom cylinder rod side to lower the boom. The new system also allows effcient combined operation of swing and boom lower.

Boom Mode Selector

The amount the body can be lifted or pulled by the front of machine can be ON or OFF selected. This helps to provide for more comfortable operation and contributes to longer component

P M

Arm Raise

Bucket Roll-out

Swing

Boom Lower

Combined Operation of Boom and Arm

In combined operation of swing + boom lower + arm roll-out, or in leveling (boom lower + arm roll-out), arm roll-out speed can be increased greatly.

Here’s why. A variable throttle, provided in the arm circuit, adjusts the fow when needed to reduce hydraulic loss in combined operation with arm roll-out.

Development Concept of New Engine

High Power Yet Low Fuel Consumption

4% Increase in output (vs. Conventional model)

• 345 kW (463 HP) / 1 800 min -1

The new clean engine, complying with the emission regulations Tier 3 in US (EPA) and EU Stage III, can maintain low fuel costs by electronic control.

Common Rail Type Fuel Injection System

Electronic control common rail type fuel injection system drives an integrated fuel pump at an ultrahigh pressure to distribute fuel to each injector per cylinder through a common rail. This enables optimum combustion to generate big horsepower, and reduce PM* and fuel consumption.

Cooled EGR** System

Exhaust gas is partially mixed with intake air to lower combustion temperature for reducing NOx and fuel consumption.

What’s more, the EGR cooler cools down exhaust gas to increase air concentration for complete combustion, reducing PM*.

*Particulate Matter **Exhaust Gas Recirculation

Fuel Filter Fuel Pump

Common Rail Pressure Sensor

Common Rail

Fuel Tank Control Unit Injector

Coolant

EGR Cooler

Control Unit

Intake

EGR Control Valve

Cylinder Head

Exhaust

ON Comfortable mode

There is little lifting or pulling of the body so there is less vibration and shock.

OFF Powerful mode

Much lifting and pulling of the body so there is more vibration and shock.

ameter Front Piping

g is increased in diameter to draulic loss (theoretically 7%) y front operation.

New Bucket Regenerative System

Swift bucket actions can be done in combined operation for excavation through the new bucket regenerative circuit. When the load to the bucket is light, pressurized oil from bucket cylinder rod side is delivered through a regenerative valve to bucket cylinder bottom side for the effective use of hydraulic energy.

Page 5 - brochures

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