5
HM350-1
ARTICULATED DUMP TRUCK
4
P
RODUCTIVITY
F
EATURES
HD325
-7R
OFF-HIGHWAY TRUCK
HD325
-7R
O
F F
- H
I G H W A Y
T
R U C K
Automatic Idling Setting System (AISS)
This system facilitates quick engine warm-up and cab cool-
ing/warming. When setting the system ON, engine idle
speed is kept at 945 rpm when coolant temper-
ature is
50°C
122°F or lower. Speed automati-
cally returns to 750 rpm when coolant tempera-
ture reaches
50°C
122°F.
Fully hydraulic controlled wet multiple-disc
brakes and retarder
Wet multiple-disc brakes ensures highly reliable and stable
brake performance. The large-capacity, continuously
cooled, wet multiple-disc brakes also function as a highly
responsive retarder which gives the operator greater
confidence at higher
speeds when travel-
ling downhill.
Automatic Retard Speed Control (ARSC)
(Option)
ARSC allows the operator to simply set the downhill travel
speed and go down slopes at a constant speed. As a
result, the operator can concentrate on steering. The speed
can be set at increments of
1 km/h
0.6 MPH per click (
±5
km/h
3.1 MPH of setting speed adjustment) to match the
optimum speed for the slope. Also, since the retarder
cooling oil temperature is always monitored, the speed is
automatically lowered.
Komatsu technology
Go down
slope
at
constant
speed
UP
SET
DOWN
CANCEL
AUTO RETARD
SPEED CONTROL
• Retarder Absorbing
Capacity (continuous
descent):
662 kW
887 HP
• Brake Surface Area
(rear):
50,847 cm
2
7,881 in
2
Payload Meter
II
(PLM
II
)
(Option)
PLM II allows the production volume and the working
conditions on the dump truck to be analyzed and controlled
directly via a personal computer. The system can store up
to 2900 working cycles.
Small turning radius
The MacPherson strut type front suspension has a special
A-frame 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.
7.2m
23'7"
A-frame
In Cab
Laptop
RS232C
PLM
II
Memory card reader
Daily report
Note) The memory card, card reader and software for data processing are available as options.
Memory card
In Office
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.
K-ATOMiCS
(Komatsu Advanced Transmission with
Optimum Modulation Control System)
High performance Komatsu SAA6D140E-5 engine
Powerful turbocharged and air-to-air aftercooled Komatsu
SAA6D140E-5 engine provides
371 kW
498 HP (Net). This
engine realizes high power in low fuel consumption with
Common Rail Injection system (CRI), and thus it delivers
higher travel speeds with high horsepower. Also high torque
at low speed, impressive acceleration, and low fuel con-
sumption ensure maximum productivity
Komatsu develops and produces all major components,
such as engines, electronics and hydraulic components,
in house.
With this “Komatsu Technology,” and adding customer
feedback, Komatsu is achieving greate advancements
in technology.
To achieve both high levels of productivity and economical
performance, Komatsu has developed the main compo-
nents with a total control system.
The result is a new generation of high performance and
environment friendly machines.
Mode selection system
The system allows selection of the appropriate mode
between two modes <Power mode > or <Economy mode>
according to each working condition. The mode is easily
selected with a switch in the operator’s cab.
Power mode
Great productivity can be attained by taking full advantage
of high output power. It is appropriate for job sites where
larger production uphill-hauling is required.
Economy mode (Variable horsepower control)
The engine power automatically changes depending on
loaded or unloaded conditions always to use an optimum
speed gear. It is appropriate for light work on flat ground.
Long wheelbase and wide tread
With an extra-long wheelbase, a wide tread and an excep-
tionally low center of gravity, the HD325-7R hauls the load
at higher speed for greater productivity, and delivers superi-
or driving comfort over rough terrain.
Large body
A wide target area makes for easy loading with minimal soil
spillage and more efficient hauling. The V-shape design
also increases structural strength, and provides excellent
load stability.
