komatsu HD325-6 SPECIFICATIONS

HD325-6

HORSEPOWER

GROSS 379 kW 508 HP

NET 364 kW 488 HP

MAX. GROSS VEHICLE WEIGHT

65200 kg 143,740 lb

Photo may include optional equipment.

OFF-HIGHWAYTRUCK

Clean, fuel-efficient engine

Common-rail fuel injection system provides high injection
pressure for low emission.Ductile cast-iron pistons and heli­cal intake ports make this engine a great fuel saver.

Mode-switching system

Electronic engine control provides superior climbing ability
and outstanding fuel economy.

High power mode with superior operating power suited to job
sites where much time is spent working on inclines.

Economy mode with reduced fuel consumption and operating
noise should be used when working on level sites or under
conditions where machine load is lighter.

Automatic idling setting system (AISS)

This system facilitates quick engine warm-up and cab cool­ing/warming with air conditioner.

When setting the system ON, engine idle speed is kept at
1000 rpm when coolant temperature is 50˚C(122˚F) or lower.
Speed automatically returns to 650 rpm when coolant tem­perature reaches 50˚C(122˚F) .

7-speed, fully automatic K-ATOMiCS transmission

The K-ATOMiCS (Komatsu
Advanced Transmission with
Optimum Modulation Control
System) automatically selects
the optimum gear according to
vehicle speed, engine speed
and the shift position you’ve
chosen.The result: the best
gear for any driving situation.

Oil-Cooled multiple-disc retarder and optional
exhaust retarder

The truck can be decelerated
without frequent use of the
brakes, allowing you to travel
safer at higher speeds, even
down long, steep slopes.

Long wheelbase and wide tread

With an extra-long wheelbase, a wide tread and an excep­tionally low center of gravity, the HD325-6 hauls the load at
higher speed for more production, and delivers supreme driv­ing comfort over rough terrain.

Big body

A wide target area makes for easy loading with minimal soil
spillage and more efficient hauling.

Small turning radius

The MacPherson strut type front
suspension has a special A­frame between each wheel
and the main frame.The
wider space created
between the front wheels
and the main frame
increases the turning angle
of the wheels.The larger
this turning angle, the small­er the turning radius of the
truck.

PRODUCTIVITY FEATURES

2

O FF-HIGHWAY T RUCK

HD325-6

K-ATOMiCS
(Komatsu Advanced Transmission
with Optimum Modulation Control
System)

Oil-cooled multiple-disc brakes

A-frame

7.2m(23'7"

)

OPERATOR ENVIRONMENT

OFF-HIGHW A Y TRUCK

HD325-6

3

Nitrogen gas

Oil

Sturdy, refined frame

Cast-steel components are
employed in the main frame in
critical areas where loads and
shocks are most concentrated.

Rigorous dump body design

The standard dump body is made of 130 kg/mm2184,900 ps
high-tensile-strength steel for excellent rigidity and reduced
maintenance cost.The V­shape design also increases
structural strength.The side
and bottom plates of the dump
section are reinforced with ribs
for added strength.

Reliable hydraulic system

The oil cooler is installed below the retarder, improving the
reliability of the hydraulic system during sudden temperature
rises. Fur ther, in addition to the main filter, a 52-micron line
filter is set at the entrance to the transmission control valve.
This system helps prevent secondary faults.

Excellent footwork and durable power train

By adopting electronic modulation on all levels, peak torque when
shifting is reduced, raising the endurance of the power train.

Electronic devices for excellent operation

In the harness connection, a dual-lock connector is used to
prevent loosening from vibrations and contact failure. Also,
the base boards for controllers and other devices are fixed
by molding (with resin) , realizing high water, dust and vibra­tion resistance.

EXCELLENT

RELIABILITY AND

DURABILITY

K-ATOMiCS with “Skip-shift” Function

An electronically controlled valve is provided for each clutch
pack in the transmission for independent clutch engagement/
disengagement. It enables an ideal change in clutch modula­tion pressure and torque cut-off timing in response to travel
conditions.This system and newly added “skip-shift” function
ensure smooth shifting and responsive acceleration.

“Skip-shift” function

Optimum travel speed automatically selected in response to
angle of ascent.
Reduced frequency of
shift downs and
smoother operation are
provided.

Hydropneumatic suspension

All four wheels have hydropneumat­ic suspension with a fixed throttle
damper control valve that greatly
reduces pitching, rolling and
bouncing over rough terrain.

Ideal driving position
settings

The 5-way adjustable operator seat and the tilt-telescopic
steering column create an optimum driving posture, for
increased driving comfort and more control over the
machine’s operations.

See everything in quiet comfort

Wide windows in the front, side and back, plus plenty of
space in the richly upholstered interior, give you a quiet,
comfortable environment from which to see and control every
aspect of your work.

F4

F4

Shift hold

F4

Shift down

F1

F4

F4

Shift down

F3

F3

Shift down

F2

F2

Shift down

F1

Skip-shift

Current

Cast steel

Protection functions supported by electronic control

Item Function

Downshift inhibitor
Over-run inhibitor
Reverse inhibitor
Forward/Reverse shift inhibitor
Anti-hunting system
Neutral safety

Even if the driver downshifts accidentally,a speed appropriate to the current gear is automatically set,preventing over-runs.

When descending grades,if the vehicle,s speed surpasses the maximum for the current gear,
the rear brakes automatically operate,preventing over-runs.

The vehicle is prevented from moving backward when operating the body.
This device makes it impossible to shift from forward to reverse when the vehicle
When running near a shift point,smooth automatic shifting takes place.
The engine is prevented from starting when the shift lever is not in neutral.

,

s speed surpasses 4 km/hour.