Cover.

fm Page 1 Sunday, May 27, 2001 1:11 AM

PRODUCT BULLETIN

HM400-1
Articulated Dump Truck
INTERNAL USE ONLY

Photo may include optional equipment

Introducing the
HM400-1 Articulated Dump Truck
Cover.fm Page 2 Saturday, May 26, 2001 11:01 PM
HM400.book Page 1 Saturday, May 26, 2001 10:29 PM

TABLE OF CONTENTS
1 HIGHLIGHTS AND TECHNICAL SELLING POINTS ............................................ 2-3
2 PURPOSE AND SCOPE
HISTORY OF DEVELOPMENT........................................................................................................ 4
MAJOR MANUFACTURER ............................................................................................................. 4
PURPOSES OF DEVELOPMENT .................................................................................................... 5
RIGHT USE OF ARTICULATED DUMP TRUCK AND RIGID DUMP TRUCK..................................... 5

3 PRODUCTIVITY FEATURES
HIGH PERFORMANCE SAA6D140E-3 ENGINE .............................................................................. 6
HIGH-PRESSURE FUEL INJECTION SYSTEM ............................................................................ 6-8
DETAILS OF HIGH-PRESSURE FUEL INJECTION SYSTEM ...................................................... 9-10
SAA6D140E-3 ENGINE................................................................................................................ 11
MODE SELECTOR SYSTEM......................................................................................................... 12
AUTOMATIC IDLING SETTING SYSTEM (AISS) .......................................................................... 12
INTERAXLE AND DIFFERENTIAL LOCKING SYSTEMS................................................................ 13
ELECTRONICALLY CONTROLLED TRANSMISSION.................................................................... 14
FULLY HYDRAULICALLY CONTROLLED WET MULTIPLE-DISC BRAKE ..................................... 14
ARTICULATED STEERING ........................................................................................................... 14
BOX SECTION FRAME STRUCTURE............................................................................................ 15
HYDROPNEUMATIC SUSPENSION ........................................................................................ 15-16
LARGE CAPACITY BODY............................................................................................................. 16
MATCHING WITH LOADING MACHINES ..................................................................................... 16
PRODUCTIVITY........................................................................................................................... 17
ROCK BODY (OPTIONAL)............................................................................................................ 18

4 COMFORT FEATURES
WIDE, SPACIOUS CAB ................................................................................................................ 19
AIR SUSPENSION SEAT.............................................................................................................. 19
VISCOUS CAB MOUNTS.............................................................................................................. 20
POLISHED OPERATION FEELING................................................................................................ 20
HIGH STEERING PERFORMANCE AND CONTROLLABILITY ....................................................... 20
ELECTRIC BODY DUMP CONTROL LEVER.................................................................................. 21
INSTRUMENT PANEL.................................................................................................................. 21

5 SAFETY FEATURES
BUILT-IN ROPS/FOPS ................................................................................................................. 22
THREE INDEPENDENT FULLY HYDRAULIC BRAKES .................................................................. 22
EMERGENCY BRAKE................................................................................................................... 22
EMERGENCY STEERING SYSTEM .............................................................................................. 22
FULL SAFETY DEVICES............................................................................................................... 23
SAFETY ACCESSORIES............................................................................................................... 23

6 EASY MAINTENANCE
FULL OPEN HOOD AND TILTABLE CAB ...................................................................................... 24
FEWER GREASE POINTS ............................................................................................................ 24
WET MULTIPLE-DISC BRAKES................................................................................................... 24
CENTRALIZED ARRANGEMENT OF ELEMENTS .......................................................................... 25
REMOTE GREASING ................................................................................................................... 25
RELIABLE ELECTRIC PARTS....................................................................................................... 25

7 ATTACHMENTS AND OPTIONAL EQUIPMENT ............................................... 26-27

8 INTERCHANGEABILITY .............................................................................................. 28-29
9 DRAWING & PERFORMANCE CURVES
EXTERNAL APPEARANCE AND DIMENSIONS............................................................................. 30
TRAVEL PERFORMANCE CURVE ................................................................................................ 30
BRAKE PERFORMANCE CURVES................................................................................................ 31

10 COMPARATIVE SPECIFICATIONS ........................................................................ 32-33

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HM400.book Page 2 Saturday, May 26, 2001 10:29 PM

1 HIGHLIGHTS AND
TECHNICAL SELLING POINTS

The HM400-1 offers all around maximum productivity with faster travel speed
and many features enhancing efficiency, as well as reduced maintenance
costs. Everywhere from construction sites to landfill, the HM400-1 excels.

High Performance and Environment

friendly SAA6D140E-3 Engine
• Gross Horsepower: 331 kW 444 HP
• Meets North American EPA Tier 2
emission regulations for 2001.

Wide, Spacious Cab Tiltable Cab

• The wide cab offers a comfortable operator The cab can be tilted rearward to
environment. provide easy service.
• Viscous mounts support the cab while
absorbing vibrations and noise.
• Interior noise level: 76 dB(A). Fully Hydraulic Articulated Steering
• Light and easy operation.
• Minimum turning radius: 8.7 m 28' 7"

2
HM400.book Page 3 Saturday, May 26, 2001 10:29 PM

Komatsu Designed Electronically Controlled

Transmission for a Comfortable Ride
F6-R2 counter-shaft type transmission with
K-ATOMiCS (Komatsu Advanced
Transmission with Optimum Control System).

Easy-to-Load Body
• Heaped capacity: 22.3 m3 29.2 cu.yd
• Low loading height: 2970 mm 9'9"
• Robust body constructed of thick wear-resistant
steel having 400 Brinell hardness.

Hydropneumatic
Suspension for All Terrain
The hydropneumatic
suspension assures a
comfortable ride even over
rough terrain.

Lubrication-Free
Oscillating Hitch
The lubricant-free
oscillating hitch means
lower operating costs.

Interaxle & Differential Locks for Reliable Wet Type Multiple-Disc Brake and
Excellent Traction in Rough Terrain Retarder
The oil-cooled multiple-disc interaxle • Fully hydraulically controlled wet multiple-disc
lock and differential locks can be turned brake.
on and off during travelling. • Retarder Absorbing Capacity
Also the differential locks can lock up (continuous descent):
all 3-axles differentials for maximum 405 kW 544 HP
traction. 583 kW 782 HP (with optional exhaust retarder)

3
 HM400.book Page 4 Saturday, May 26, 2001 10:29 PM

HISTORY OF DEVELOPMENT
2 PURPOSE AND SCOPE

The demand for articulated dump thought it was the time to put the articu-
trucks increased rapidly over the world lated dump trucks of the Komatsu
and has been around 4,200 - 4,700 brand in the market and developed the
units/year recently. Then, Komatsu HM400.

Units
Demand for articulated dump trucks by class
6,000

5,000 4718 4711 4745

4248 4318 Over 35 tons class
4131 583
639 798
4,000 385
772 856 963
759
646
781
30-35 tons class
2868
3,000 878 811
1,099
279
1,011 1,084 1,127 26-30 tons class
1961 1862 2119 518
2,000 187 843 901
229
371
161
270
406 646 20-26 tons class
443
330 375 2,085 1,967 1,830
1,000 1,837
1.581 1,607
904 964 1,037
1,386 Under 20 tons class
127 72 40 50 213 190 225 177 76
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 FVH00438

MAJOR MANUFACTURER

The major articulated dump truck man- equivalent to the hauling capacities on
ufacturers and the series of their prod- the unit of short ton which is used in the
ucts are shown in the following figure. U.S.A.
Volvo has 5 series, the hauling capacity 1 short ton = 2,000 lb = 2,000 x
of which ranges from 20 tons to 36 0.4536 kg = 0.9072 tons
tons, and CAT has 4 series, the hauling The model code of the HM400 is also
capacity of which ranges from 22.5 determined from the hauling capacity
tons to 36 tons. of 36.5 tons (40 short tons).
The model codes of Volvo are 25, 30, Note: Only the hauling capacity of
35, and 40, and those of CAT are 250, Volvo A20 is not expressed on the short
300, 350, and 400. These codes are ton but on the metric ton.
Articulated dump truck
Payload New Rigid dump truck Electric drive type
Metric ton 20 50 100 200 300 400
HD465

HD785

HD985
HM400

KOMATSU
HD325

930E2SE
HD1500
HD1200E

630E

830E
730E
HD785LC
HD405

HD605
HD255

Quarry truck
KMS
773D

CAT
725/D250E-2

730/D300E-2

769D
D400E-2
D350E-2

771D

775D

797
793C
777D

789C
785C

Quarry truck
R60C/65C

VOLVO
EH1600
EH1700

EH4500
EH3500
EH3000

EH4000
A40D
A25C

A30C
A20C

A35D

EH750

Euclid-Hitachi
R32
R36

MT3700B
MT3600B

TEREX
MT4400
MT3300

MT5500
MT3000
TA35
TA30
TA25

TA40

TR100
TR60
TR35
TR40
TR45

FVH00439(2)

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HM400.book Page 5 Saturday, May 26, 2001 10:29 PM

PURPOSE AND SCOPE 2

PURPOSES OF DEVELOPMENT

The basic concept of development of ● Attainment of outstanding productiv-

the HM400 was to make up a new artic- ity and reliability
ulated dump truck by using the technol- ● Attainment of comfortable driving
ogies and components which Komatsu environment which is a feature of
had developed for wheel loaders and Komatsu's construction machines
dump trucks. ● Sufficient measures to secure safety
We also applied the following design ● Facilitation of maintenance
ideas which were the basic concept of ● Machine friendly to the environment
Komatsu's construction machines to
development of the HM400.

RIGHT USE OF ARTICULATED

DUMP TRUCK AND RIGID
DUMP TRUCK
An articulated dump truck has the fol- On the other hand, the rigid dump truck
lowing advantages over a rigid dump can travel faster and more stable.
truck. Accordingly, it can attain higher produc-
● Has high ability to travel through tivity if the jobsite condition is good.
rough terrain Each salesman (saleswoman) is
● Does not slip easily while ascend- requested to recommend the articu-
ing lated dump truck or the rigid dump
● Less affected by road conditions. truck, depending on the jobsite condi-
Accordingly, it is suitable for rough ter- tion.
rain, slippery slopes, narrow road, etc.
where the rigid dump truck cannot
travel.

Features of Hauling Machines

(Hauling Distance and Ground Condition)
Cone index
Hard kg/cm2(PSI)

Dry soil
15 (213)
Motor scraper Rigid dump truck
Soft soil
Rigid dump truck 4WD
Soft ground 10 (142)

Mud Articulated dump truck

5 (71) Tire width is still increasing

Soft Towed scraper

Bulldozer
Crawler dump truck
100 m (109 yd) 1000 m (1,090 yd) 10000 m (10,900 yd)

Short Hauling distance Long

5
 HM400.book Page 6 Saturday, May 26, 2001 10:29 PM

HIGH PERFORMANCE
3 PRODUCTIVITY FEATURES
SAA6D140E-3 ENGINE
High performance SAA6D140E-3 higher travel speeds with the highest
engine delivers faster acceleration and horsepower per ton in its class.

Model KOMATSU VOLVO CAT

Item HM400 A40D D400E-II
Engine model — Komatsu Volvo
Cat 3406E
SAA6D140E-3 D12CAAE-2
Piston displacement Itr (cu.in) 15.24 (928) 12.00 (732) 14.60 (893)
(A) Flywheel horsepower (Net) HP 430 414 405
(B) Gross vehicle weight ton 66.88 68.27 67.95
(A/B) HP/ton 6.43 6.06 5.96

HIGH-PRESSURE FUEL
INJECTION SYSTEM
Engine conforms to the USA Environ-
mental Protection Agency (EPA) emis-
sion regulations.

Emission regulation trends

New emission regulations are stricter In the USA, EPA will apply regulations
than the current ones and will be in 2001. In EU, regulations, based on
applied to construction machine inter- those of the EPA, will be applied in
nationally. 2002.

Regulation Values
EC Regulations EPA Regulations
Regulated Substances Unit Output range of controlled engine (kW)
130–560 225–450
HC g/kW-h 1.0 6.4
Exhaust Gas NOx g/kW-h 6.0 (NMHC* + NOx)
Particulate g/kW-h 0.20 0.20
* NMHC = HC x 0.98 (98% of HC total value)

Regulated Substances Mode Unit EPA Regulations

Acceleration mode % 20
Black smoke Lagging mode % 15
Peak mode % 50

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HM400.book Page 7 Saturday, May 26, 2001 10:29 PM

PRODUCTIVITY FEATURES 3
HIGH-PRESSURE FUEL
INJECTION SYSTEM continued
The HC, CO, and black smoke in bustion temperature rises and fuel
exhaust gas are produced by incom- burns completely. These two different
plete combustion. NOx (nitrogen problems must both be solved to
oxides) are produced more as the com- achieve optimal environmental benefit.
Purpose

Reduction of NOx Reduction of HC, CO, and black smoke

• Supply much cool air to cylinders.

Lower combustion temperature
Base concept

• Mix fuel and air quickly.

(as NOx is produced more at • Finish complete combustion in short time.
higher combustion temperature).

Inject fuel at high-pressure Accelerate flow of intake air Increase quantity of intake air
Shorten high temperature
combustion time.
• Optimize turbocharger.
• Reduce volume of piston clearance
Employ common rail injection system Optimize swirling of intake air
Measures

Delay fuel injection to shorten

time for production of NOx. (high-pressure fuel injection
system controlled electronically).
Intake port
Cool intake air Valve pocket Reentrant

Liner
Cool intake air with air-cooled
Flow of
aftercooler
intake air

Increase air flow during

compression

Common rail Injector Injection at high pressure (Free control)

1200 (600) 1200 (800)

1200 (800)
Load

1200 (300)

Engine speed
Fuel can be injected at high pressure of 1200 kg/cm2, independent of
engine speed. Note: Values in above graph are injection pressure and
those in ( ) values of conventional in-line pump.

Free control of injection timing

Injection timing

High pressure pump Load ed

e spe
Engin

Fuel discharged from high-pressure pump is pressurized in Injection form is controlled properly by electronic control according
common rail, then sent to injector. to engine speed and load to produce clean exhaust gas.

7
 HM400.book Page 8 Saturday, May 26, 2001 10:29 PM

HIGH-PRESSURE FUEL
3 PRODUCTIVITY FEATURES
INJECTION SYSTEM continued
While the conventional injection system gas color and power characteristics are
can only attain 800 kg/cm 2 (11,380 psi) greatly improved in the low-speed and
at maximum, the new system can attain high-load range (when the engine is
high pressure of 1,200 kg/ cm2 (17,070 under significant load) and in starting
psi) since fuel is pressurized in the and accelerating periods.
common rail.
Accordingly, finer fuel particles are pro- A compact high-pressure pump is
duced and better mixed with air for installed on the side of the engine. Its
smoother combustion. drive peak torque and load on the tim-
ing gear of the engine are lower than
Since the new type of injection system those of the conventional large pump
can produce high pressure constantly, housing. Accordingly, the engine sound
even in a low speed ranges compared is reduced.
to other injection systems, the exhaust

kg/cm2

2000 pump
jector lled in-line
Injection Pressure

U nit in contro
nically
Electro
1000 Common rail

mp
al in-line pu
Convention

rpm
Engine Speed

8
HM400.book Page 9 Saturday, May 26, 2001 10:29 PM

PRODUCTIVITY FEATURES 3
DETAILS OF HIGH-PRESSURE
FUEL INJECTION SYSTEM
Fuel system

The fuel system consists of the high- mon rail with high pressure, a common
pressure fuel supply pump to draw fuel rail to store the high-pressure fuel,
from the tank and supply it to the com- injector, and electronic controller.

Electronic controller
: Flow of fuel (ECU)
: Electric signal

Injection pressure Pressure Injection timing/period

control signal signal control signal

Feed High-pressure fuel Common

Fuel tank supply pump Injector Needle Cylinder
pump rail

Control system

ECU (Controller) calculates and con- will be injected in the optimum timing in
trols the timing and period to turn on the optimum amount. The control sys-
the injector solenoid valve according to tem is roughly divided by the type of the
the signals from the sensors installed electric parts into the sensor section,
to the engine and vehicle so that fuel controller section, and actuator section.

Sensor Section Controller Section Actuator Section

(Opening ratio of
Accelerator sensor accelerator) Injector

(Fuel injection rate, injecting

timing control, etc.)
Crank angle sensor
(Engine speed)
(NE sensor)

ECU Common rail

Cylinder distinction sensor (Cylinder distinction

(Sub NE sensor) signal)

Other sensors and switches Fuel supply pump

(Fuel injection pressure control)

Fuel filter

The fuel filter used for this engine has a fuel filter can decrease the engine per-
special structure to remove fine dirt formance and cause serious problems
from fuel. Not using a genuine Komatsu with the injection pump system.

9
 HM400.book Page 10 Saturday, May 26, 2001 10:29 PM

DETAILS OF HIGH-PRESSURE
3 PRODUCTIVITY FEATURES
FUEL INJECTION SYSTEM
continued
Outline of structure and operation of system

1. The fuel in the fuel tank is sent to the 3. The common rail stores the pressurized
high-pressure fuel supply pump by the fuel until the time for injection.
feed pump.
4. The 2-way solenoid valve and needle
2. The high-pressure fuel supply pump valve of the injector inject the optimal
sends the fuel to the common rail with quantity of fuel into the cylinder with opti-
pressure of about 117 MPa {1200 kgf/ mum timing according to the control of
cm2 (17,070 psi)}. ECU.

2-way valve
Leaked fuel
Injector
Pressure
sensor Pressure
limiter
Common rail

Nozzle
Fuel tank Fuel tank
Fuel high pressure
supply pump Fuel filter

Over flow

Feed pump

Fuel tank
Fuel tank

ECU
(Controller)

Physical amount
display tool
Engine
(Note type personal
speed
computer)
sensor
Interface box

Engine speed
pulse wheel Accelerator sensor 1 (Dump trucks only)
Accelerator sensor 2 (Dump trucks only)
Coolant temperature sensor
Intake pressure sensor
Various switches

10
HM400.book Page 11 Saturday, May 26, 2001 10:29 PM

PRODUCTIVITY FEATURES 3
SAA6D140E-3 ENGINE

Features of SAA6D140E-3 engine

140E-3 engine replaces the current (Replacement period of engine oil and
140E-2 engine. Like the current engine, filter: 250 hours ' 500 hours)
it is an in-line 6-cylinder, water-cooled,
direct injection, and 4-stroke diesel Low noise and low vibration
engine but incorporates many new While the overall length, overall height,
technologies. and overall width of the cylinder block
are the same as the current engine, the
High-pressure fuel injection system thickness of the cylinder block top has
controlled electronically been increased so that the block is less
This engine is equipped with a high- likely to be deformed when used for
pressure fuel injection system control- long hours and can be machined easily
led electronically instead of the current during rebuilding. The rigidity of the
in-line injection pump and fuel system main rib is increased to reduce defor-
controlled with mechanical governors. mation, vibration, and noise when the
The details of this system will be block is loaded.
described later.
Three underframes are installed, like
Reentrant piston beams, to the underside of the cylinder
The reentrant combustion chamber and block to reduce the vibration and noise
piston made of cast iron and having of the block skirt.
less thermal expansion coefficient,
which have been used in the 140E-2 Various accessories
engine for years are employed to attain The following functions are available
cleaner exhaust gas, better exhaust with the electronically controlled
gas color, lower fuel consumption, high engine:
durability, and high reliability.
Alarm function
High compression ratio Important characteristics of the engine
The compression ratio is set higher (Water temperature, oil pressure, fuel
than the current engine to improve the injection pressure, etc.) are measured
combustion efficiency for lower fuel with sensors. If any abnormality in
consumption and reduce white smoke operation is detected, the alarm is
produced when the engine is started in turned on and the engine is set to the
cold weather. The high-pressure fuel emergency evacuation low idle mode
injection system, controlled electroni- automatically.
cally, optimizes the injection character-
istics in a cold state to improve the Turbocharger protection system
startability and reduce emission of If the engine speed is raised immedi-
white smoke. ately after the engine is started at very
low temperature, the lubricating oil is
Lengthening of replacement period not supplied sufficiently. As a result,
of engine oil filter each bearing is overloaded and the life
The number of the piston cooling noz- span of the engine is shortened. The
zles for each piston is increased from turbocharger protection system pre-
one to two to improve the durability of vents this problem by limiting the
the pistons and lower the temperature increase of the engine speed.
of the back side of the pistons which
prevents deterioration of the lubricating
oil by high temperature. In addition,
since the high-pressure fuel injection
system, controlled electronically,
reduces soot, the replacement period
of the engine oil filter is lengthened.
11
 HM400.book Page 12 Saturday, May 26, 2001 10:29 PM

MODE SELECTOR SYSTEM

3 PRODUCTIVITY FEATURES

To improve operating performance and Economy mode

lower fuel consumption, the high power In this mode, the engine output is lim-
mode or the economy mode is selected ited and less fuel is consumed. Accord-
according to the work requirements ingly, this mode is suitable to jobsites
and conditions. where the vehicle is loaded relatively
lightly (driving on flat ground for short
What is the 2-mode system? distances, driving down slopes with
The engine output characteristics and loads, etc.)
gear shifting characteristics are
changed for each working condition.
Either of the two modes can be
selected easily with a switch in the
operator's cab.

High power mode

In this mode, the power of the vehicle
can be used fully and the maximum
production obtained. Accordingly, this
mode is suitable to high production job-
sites such as driving up slopes with Mode selector switch
loads, etc.

AUTOMATIC IDLING SETTING

SYSTEM (AISS)
AISS is used to set the low idling speed
low (650 rpm) or high (945 rpm)
according to the operating condition of
the vehicle.
With this system, fuel consumption is
reduced and starting and acceleration
performance is improved.

AISS can be turned on and off easily

with a switch in the operator's cab.
AISS LOW switch
Functions of AISS
If the AISS LOW switch is set to the
AUTO position, the low idling speed is If the parking brake or retarder brake is
set to high when the cooling water tem- turned off, the low idling speed is
perature is below 50ºC. After the cool- changed from low to high automatically
ing water temperature rises, the low and the starting and acceleration per-
idling speed is set to low automatically. formance is improved. If the parking
This function produces the following brake or retarder brake is turned on,
benefits. the low idling speed is set to low auto-
(A) The engine can be warmed up in matically. When fine control of the vehi-
less time. cle is required (i.e. for putting it into a
(B) The heater and air conditioner start garage, etc.) if the AISS LOW switch is
working faster. set to the LOW position, the low idling
(C) Overcooling can be prevented in speed is fixed to low.
cold weather.

12
HM400.book Page 13 Saturday, May 26, 2001 10:29 PM

PRODUCTIVITY FEATURES 3
INTERAXLE AND DIFFEREN-
TIAL LOCKING SYSTEMS
The full-time six-wheel drive system is the vehicle is travelling, thereby boost-
employed to reduce slippage and stabi- ing productivity. Since the differential
lize the travel performance. A wet mul- lock can be turned on and off while the
tiple-disc interaxle clutch also locks the vehicle is travelling, the working effi-
three axles in unison for greater trac- ciency is increased. In addition, since
tion. The interaxle lock and differential slippage of the tires is minimized, the
locks can be switched on and off while service life of the tire is prolonged.

Interaxle differential lock switch

Differential lock switch
(When differential lock pedal is pressed with this switch pressed,
differential lock is turned on)

[Drive with differential lock and interaxle differential lock systems]

(1) Used for ordinary travel (on hard ground).
Position Interaxle differential lock (2) Used for travel on places where front and
of switch rear tires slip easily (on soft ground).
(3) Used for travel on places where rear-front
and rear-rear tires on one side slip easily
(1) (2) (on soft ground).
Differential lock

(4) Used when any tire almost slips during

travel patterns (2) or (3) above.
(5) Hardly used at all.
(3) (4) (6) Used when tires are caught in mud and
maximum driving traction is necessary.

Note: If the differential lock switch and/or

(5) (6) interaxle differential lock switch are/is turned
on, the controllability of the steering wheel is
decreased. Accordingly, be sure to keep
Effective in F1, F2, F3 R1, and R2 those switches turned off during ordinary
travel.

Model Komatsu VOLVO CAT

Item HM400 A40D D400E-II
Drive type Full-time 6WD 4WD (6WD only Full-time 6WD
when front wheels
are turned on)
Type of interaxle differential Wet multiple disc Dog clutch type Wet multiple disc
locking system type type
Type of differential locking Wet multiple disc Dog clutch type Wet multiple disc
system type type
Turning on/off differential lock Possible Impossible Possible
while vehicle is travelling

13
 HM400.book Page 14 Saturday, May 26, 2001 10:29 PM

ELECTRONICALLY CONTROLLED
3 PRODUCTIVITY FEATURES
TRANSMISSION
The field-proven counter-shaft type F6-
R2 transmission is employed. With the
electronic clutch modulation system
"K-ATOMiCS" for the all gear speeds
which controls the clutch oil pressure
properly when the gear is shifted and
the engine-cooperative control system,
the gear is shifted smoothly.

FULLY HYDRAULICALLY CON-

TROLLED WET MULTIPLE-DISC
BRAKE
Wet multiple-disc brakes have been
proven on Komatsu dump trucks and
wheel loaders. They ensure highly reli-
able and stable brake performance.
The large-capacity wet-multiple disc
brakes also function as a highly
responsive retarder which gives the
operator great confidence while travel-
ling downhill.

Model Komatsu VOLVO CAT

Item HM400 A40D D400E-II
Wet multiple- Hydraulic type +
Retarder type — Exhaust brake
disc type Exhaust brake
Time lag in operation
sec 0.3 Min. 1.0 Min. 1.0
of retarder
Retarder absorbing
HP 544 511 385
capacity (continuous)

Descending –10° km/h (MPH) 39 (24) 27 (17) 12 (7)

speed –15° km/h (MPH) 25 (16) 18 (11) 6 (4)
(continuous) –20° km/h (MPH) 17 (11) 12 (7) 6 (4)

ARTICULATED STEERING

Fully hydraulic articulated steering

mach )
8'7"
ine

offers low-effort operating performance

mm (2

and maneuverability. A minimum turn-

8700
ide of

ing radius of only 8.7 m (28' 7") pro-

Outns

vides the freedom to move about in

confined areas. )
3'8"
m (1 e
1 7 0 m machin
4 e of
Insid

5750 mm (18'10")
Right angle turn aisile width

14
HM400.book Page 15 Saturday, May 26, 2001 10:29 PM

PRODUCTIVITY FEATURES 3
BOX SECTION FRAME STRUC-
TURE
Both front and rear frames have box which have been used for long years in
section structures of high rigidity. They severe jobsites. The important portions
are designed on the basis of the abun- are made of cast steel to secure high
dant data of Komatsu dump trucks durability.

HYDROPNEUMATIC SUSPEN-
SION
The hydropneumatic suspension has equalizer structure equipped with
been proven on Komatsu's rigid dump hydropneumatic suspension. The
trucks. The front axle suspension entire vehicle's suspension system
employs "De Dion" type design using a responds to the ground conditions.
long trailing arm, allowing the machine The suspension delivers a comfortable
to ride more smoothly over bumps. The ride and maximizes productivity.
rear-axles are mounted on a dynamic

15
 HM400.book Page 16 Saturday, May 26, 2001 10:29 PM

HYDROPNEUMATIC SUSPEN-
3 PRODUCTIVITY FEATURES
SION continued

Model Komatsu VOLVO CAT

Item HM400 A40D D400E-II
Front Hydropneumatic Rubber mount Hydropneumatic
suspension suspension suspension
type

"Long" trailing arm

Shock absorber
"Short" leading arm
Rear Hydropneumatic Rubber mount Hydropneumatic
suspension suspension suspension
Damping Superior Inferior Inferior
performance
Riding Superior Inferior Inferior
comfort

LARGE CAPACITY BODY

The 22.3 m3 (29.2 cu.yd) heaped The body is built of thick wear-resistant
capacity is among the highest in its steel with a Brinell hardness of 400,
class, and the low loading height of and the body shape provides excellent
2970 mm (9'9") enables easy loading. load stability.

Model Komatsu VOLVO CAT

Item HM400 A40D D400E-II
Heaped capacity (2:1) m3 (cu.yd) 22.3 (29.2) 22.5 (29.4) 21.9 (28.6)
Loading height m3 (ft.in) 2,970 (9'9") 3,075 (10'1") 3,102 (10'2")

MATCHING WITH LOADING

MACHINES
When a hydraulic excavator is used to matched to the HM400. When a wheel
load the HM400, the best passes to fill loader is used, best passes is three -
the dump body is three - ten. Accord- four. Accordingly, the WA600 and
ingly, the PC650 and PC750 are best WA700 are best matched.

Loading machine Bucket capacity Dumping Bucket width Passes

clearance
PC400 1.8 m3 (2.4 cu.yd) 5,570 mm (18'3") 1,575 mm (5'2") 11
Hydraulic
PC650 2.5 m3 (3.3 cu.yd) 8,305 mm (27'3") 1,659 mm (5'5") 8
excavator
PC750 4.0 m3 (5.2 cu.yd) 8,140 mm (26'8") 1,845 mm (6'1") 5
WA500 4.5 m3 (5.9 cu.yd) 3,050 mm (10'0") 3400 mm (11'2") 4
Wheel
WA600 6.0 m3 (7.8 cu.yd) 3,350 mm (11'0") 3,910 mm (12'10") 3
loader
WA700 8.5 m3 (11.1 cu.yd) 4,040 mm (13'3") 4,570 mm (15'0") 2

16
HM400.book Page 17 Saturday, May 26, 2001 10:29 PM

PRODUCTIVITY FEATURES 3
PRODUCTIVITY

Because of the following advantages, turned on and off while truck is trav-
the HM400 has high travel performance elling)
and its production is 7.5% higher than ● Employment of hydraulic wet multi-
the VOLVO A40D and 12.1% higher ple disc retarder brake having large
than the CAT D400E-II. capacity which can be controlled
easily with an electric lever of finger-
● Highest horsepower per ton in its touch type
class ● Employment of hydropneumatic sus-
● Employment of differential locking pension for rear axle
system and interaxle differential ● Employment of large-capacity dump
locking systems (which can be body

m3/h
(cu.yd/h)
Comparison of productivity
150
(196)
107
(140) 99 94
(129) (123)
100
(131)

50
(65)

0
HM400 A40D D400E- II

[ Test conditions ]

Dump
100 m (109 yd) 8%

800
m(
875 Load
yd) 100 m (109 yd)

FVH00444

17
 HM400.book Page 18 Saturday, May 26, 2001 10:29 PM

ROCK BODY (OPTIONAL)

3 PRODUCTIVITY FEATURES

High wear-resistant steel plates (Brinell Furthermore, ribs are added to the
hardness: HB500) are used and the sides and bottom to increase durability
thickness of each part is increased. largely.

Standard body Rock body

Type of body

Use Hauling of dirt and sand Hauling of rocks

● Special dump body having
large capacity and high hard-
ness for hauling of crushed
● Suitable for jobsite where dirt stones in quarry.
Advantages
and sand are loaded. ● High wear-resistant steel plates
are used. They are 25% harder
than steel plates which
Komatsu have been using.
Body capacity 16.5 m3 / 22.3m3 16.5 m3 / 22.3m3
Struck/Heaped (21.6 cu.yd / 29.2 cu.yd) (21.6 cu.yd / 29.2 cu.yd)
Inside dimensions
of dump body 5,630 mm x 3,195 mm x 1,440 mm 5,620 mm x 3,190 mm x 1,435 mm
Length x Width x (18'6" x 10'6" x 4'9") (18'5" x 10'6" x 4'8")
Max. depth
Loading height 2,970 mm (9'9") 3,085 mm(10'1")

18
HM400.book Page 19 Saturday, May 26, 2001 10:29 PM

COMFORT FEATURES 4
WIDE, SPACIOUS CAB

A comfortable space is secured with area and the operator's seat is posi-
electrically operated window, cool box, tioned to the left so that the operator
etc. in the wide cab. Superior visibility can see the rear of the dump truck eas-
is secured by increasing the window ily.

[Comfortable interior parts]

● Air suspension seat ● Power window
● Auxiliary seat ● Can holder
● Tiltable, telescoping steering wheel ● Ashtray
● Air conditioner ● Sun visor
● Cool box

AIR SUSPENSION SEAT

A comfortable air suspension seat with

retractable seat belt is standard. Since
its headrest, front, back and lateral
positions, reclining angle, cushion, etc.
are adjustable, it can comfortably
accommodate a person of any size.

19
 Chap4.fm Page 20 Monday, May 28, 2001 1:19 PM

VISCOUS CAB MOUNTS

4 COMFORT FEATURES

Since the cab is supported on viscous

mounts consisting of "rubber" and "sili-
cone oil" cushions, less mechanical
vibration and noise are transferred to it
from the chassis. The average noise of
left and right at operator's ears is only
76 dB(A), the operator is less fatigued
and working efficiency is increased.
The noise around the machine is so
lowered that it clears the dynamic noise
regulation (Regulation value: Maxi-
mum 113 dB(A)).

Model Komatsu VOLVO CAT

Item HM400 A40D D400E-II
Cab mount Viscous mount Rubber mount Rubber mount

POLISHED OPERATION FEELING

The HM400 follows the operation feel- that the operator can operate them
ing which Komatsu has polished for easily, anybody can drive the HM400
long years. Since the control levers, as easily as a car.
switches, and panels are so arranged

HIGH STEERING PERFOR-

MANCE AND CONTROLLABILITY
Each operator feels as if the steering The operator can use the gearshift
wheel clings to his (her) hands. The lever similarly to that on a car. Since
tiltable, telescoping steering wheel can the pedal needs lighter effort, the oper-
be set to the best position for the oper- ator is less fatigued even after long-
ator and the steering effort is light. hour operation.
Accordingly, the operator can steer the
HM400 easily.

20
Chap4.fm Page 21 Monday, May 28, 2001 1:21 PM

COMFORT FEATURES 4
ELECTRIC BODY DUMP CON-
TROL LEVER
The electric body dump control lever is
employed. Since the operating effort of
this lever is light, the operator can con-
trol dumping more easily.
Since the sensor to sense the position
(angle) of the dump body is installed for
electronic dump body control, the
shock made by returning of the dump
body is reduced.

INSTRUMENT PANEL

Various meters and caution lamps are The contents of the trouble are dis-
so arranged on the instrument panel played as trouble codes on the charac-
that the operator can read them easily. ter display and stored so that they will
Accordingly, the operator can grasp the be used for quick troubleshooting to
condition of the dump truck at a glance. shorten the downtime in future.

Troubleshooting function of instruments

panel
If any trouble occurs in the dump truck,
a message is displayed on the charac-
ter display to notify the operator of the
action to take. Accordingly, the opera-
tor can take that action immediately.

Monitoring network

Monitoring system Engine control

Transmission control

Retarder control

Character display:
This window is normally used as the service meter/odometer.
If the dump truck has any trouble or is overloaded or needs to
be inspected or serviced, a message of proper remedy and an
action code are displayed in this window. Each time the starting
switch is turned on, the system is checked. If any filter or oil
needs to be replaced at this time, the maintenance caution lamp
flashes or lights up and the filter or oil to be replaced is displayed.
21
 Chap5.fm Page 22 Saturday, May 26, 2001 11:21 PM

BUILT-IN ROPS/FOPS
5 SAFETY FEATURES

The cab with built-in ROPS/FOPS is

installed as standard in case of an
emergency. This cab has cleared the
safety standard of ISO 03471 and SAE
J1040-1988c.

THREE INDEPENDENT FULLY

HYDRAULIC BRAKES
The front, rear, and parking brakes are As the parking brake, a caliper disc
separated structurally from each other. brake having high reliability and large
The front and rear service brakes have capacity is used as standard.
two independent circuits respectively.

EMERGENCY BRAKE

If the brake circuit has any trouble, the lowers, the parking brake is operated
emergency brake operates automati- by spring force.
cally. Even if the brake oil pressure

EMERGENCY STEERING SYS-

TEM
If the steering hydraulic circuit has any secured. Emergency steering system
trouble and the hydraulic pressure in it can be turned on manually with the
lowers, the emergency steering system switch in the operator's cab.
operates automatically and safety is

22
Chap5.fm Page 23 Monday, May 28, 2001 1:24 PM

SAFETY FEATURES 5
FULL SAFETY DEVICES

1. Downshift inhibitor 6. Neutral safety

Even if the operator downshifts acci- The engine is prevented from start-
dentally, a speed appropriate to the ing when the shift lever is not in neu-
current gear is automatically set, tral.
preventing over-runs. 7. Rear frame inclination sensor
2. Over-run inhibitor If the dump truck is inclined more
When descending grades, if vehi- than the lateral safety range while
cle's speed surpasses the maximum the dump body is not seated, the
for the current gear, the brakes auto- alarm and caution lamp are turned
matically operate, preventing over- on.
runs. [Precautions for dumping operation]
3. Reverse inhibitor When dumping, park the dump truck
The vehicle is prevented from mov- on a level ground and set it in
ing backward when operating the straight travel position. If this is not
body. neglected, the dump truck may turn
4. Forward/Reverse shift inhibitor over.
The device makes it impossible to 8. Level control of maximum speed
shift from reverse to forward when limit (Optional)
the vehicle's speed surpasses 4 km/ Maximum speeds for the transmis-
hour and from forward to reverse sion are set in advance and can be
when the vehicle's speed surpasses controlled.
2 km/hour. Gears for which maximum speed
5. Anti-hunting system can be set (4th - 6th)
When running near a shift point,
smooth automatic shifting takes
place.

SAFETY ACCESSORIES

Various guards to protect the operator ● Engine underguard

and dump truck are installed as stand- ● Thermal guard
ard. ● Under view mirror to check front side
● Protective grill for rear window ● Transmission underguard
● Drive shaft guard ● Fire-prevention covers

Drive shaft guard

Engine underguard

Transmission underguard

23
 HM400.book Page 24 Saturday, May 26, 2001 10:29 PM

FULL OPEN HOOD AND TILT-

6 EASY MAINTENANCE
ABLE CAB
Since the full open hood (opening
angle can be set to 45° and 65°) is
employed, the operator can perform the
daily inspection of the engine and
transmission easily.
The tiltable cab is employed. If an
external hydraulic pump is available,
the cab can be tilted easily and the
operator can maintain the section
under the cab very easily, and the
maintenance time is shortened.

FEWER GREASE POINTS

The numbers of grease points are mini- Oil seal Taper roller bearing
mized by using maintenance-free rub-
ber bushings and a lubrication-free
oscillating hitch. Rear frame

Front frame

Model Komatsu VOLVO CAT

Item HM400 A40D D400E-II
Bearing — Taper roller bearing Bushing Bushing
Hitch
frame Greasing (Does not need to be
h 10 10
interval greased until overhaul)

WET MULTIPLE-DISC BRAKES

Since mud water, etc. cannot enter the

brake, the latter is maintenance-free.

24
HM400.book Page 25 Saturday, May 26, 2001 10:29 PM

EASY MAINTENANCE 6
CENTRALIZED ARRANGEMENT
OF ELEMENTS
The elements are centralized so that
they can be replaced easily.

REMOTE GREASING

All parts to be greased can be greased

from the ground.

RELIABLE ELECTRIC PARTS

DT-type connectors having high reliabil-

ity for construction machines are used
to connect the main wiring harnesses.
The wiring of the boards such as the
controllers is molded to attain high
vibration resistance, water resistance,
and dust resistance.

25
 HM400.book Page 26 Saturday, May 26, 2001 10:29 PM

7 ATTACHMENTS AND OPTIONAL

EQUIPMENT
Classification legend ......A: Can be shipped when machine order is acknowl-
edged by Komatsu
B: Can be shipped 3 months after machine order is
acknowledged by Komatsu
C: Can be shipped 6 months after machine order is
acknowledged by Komatsu
D: Prepared upon receiving order
STD: Standard

Classifi-
Attachment/Option Remarks
cation
Body exhaust heating kit A
Body liner A
Body

Tailgate, wire type A

Upper side extension 200 mm(8') A
Rock body C Reinforced special body for crushed
stone
Tiltable ROPS Cab with FOPS STD
Air conditioner A
Automatic air conditioner D
Electric fan D
Electric dump control lever STD
Operator's seat with armrest D
Operator's seat with electric D
heater
Retractable seat belt STD
Cab

3-point seat belt A

Passenger seat with backrest STD
Sun visor, front window STD
Power window STD
Steering wheel, tilt & telescopic STD
Cab tilt cylinder STD An external hydraulic pump is
required to tilt the cab
AM/FM radio A
AM/FM radio with cassette A
Cigarette lighter and ashtray STD

26
HM400.book Page 27 Saturday, May 26, 2001 10:29 PM

ATTACHMENTS AND OPTIONAL

EQUIPMENT 7
Classifi-
Attachment/Option Remarks
cation
Headlights with dimmer switch STD
Hazard lights STD
Indicator and stop and tail lights STD
Fog lights A
Electric parts and instruments

Yellow beacon A
Ladder lights D
Batteries for cold area arrange- A
ment (200 Ah x 12 V x 2 pcs.)
Tachograph D Travel speed (Travel distance and
time) is recorded automatically.
Revograph D Engine speed is recorded automati-
cally.
Revo-tachograph D Travel speed and engine speed are
recorded automatically.
System to count number of dump- D
ing times
Exhaust brake A
safety devices

Emergency brake STD

Brake and

Emergency steering STD

Rear under view mirrors STD
Under mirror to check front side STD
Rear frame inclination sensor STD
Protective grill for rear window STD
Engine underguard STD
Guards

Transmission underguard STD

Drive shaft guard STD
Thermal guard STD
Fire-prevention covers STD
29.5 R25 STD
Tires

875/65 R29 C
Auto-greasing system D
Fire extinguisher A
Rear view camera and monitor A
Electric rear view mirror D
Rear view mirror with heater wires D
Others

Engine oil pan heater D

Radiator shutter, canvas type D
Vandalism protection D Device to prevent robbery
Tire chain D
Jack (30 tons) A
Chock A

27
 HM400.book Page 28 Saturday, May 26, 2001 10:29 PM

8 INTERCHANGEABILITY
: Interchangeable : Basically interchangeable : Not interchangeable
Interchangeability
Name Remarks
Model
Engine SAA6D140E-3 HD325-6 Rated output is different.
Radiator
Fuel tank
Muffler
Air conditioner HD255-5
Torque converter case and transmission case are made
Torque converter HD325-6
in one unit.
Transmission New counter-shaft type transmission was developed.
Only case is different (window is added to lower tempera-
Output shaft damper HD325-6
ture in case).
Engine – Torque converter HD325-6 Long greasing interval type
Front differential – Front final drive
Drive
Transmission – Hitch frame
shaft
Hitch frame – Center axle
Center axle – Rear axle
Differential Limited slip differential is common to WA450-3.
Final drive WA400-3 Wheel bearing, axle shaft, wheel hub, etc. are different.
Axle housing
Front brake
Center brake
Rear brake
Parking brake HD325-6 Slack adjuster and spring cylinder bracket are different.
Brake valve (Service) WA500-3 Pedal angle and oil pressure gradient are different.
Brake valve (Retarder)
Retarder lever
Accumulator
ACC charging valve
WA500-3,
Slack adjuster Set pressure of relief valve was changed.
WA600-3
Steering wheel
Transmission controller
Engine controller
Retarder controller
Front frame
Rear frame
Frame (Hitch)
Front suspension HD255-5 Wear plate and seals are common.
Rear suspension HD255-5 Wear plate and seals are common.
Cab (with built-in ROPS/FOPS)
Operator's seat WA600-3 Air suspension seat

28
HM400.book Page 29 Saturday, May 26, 2001 10:29 PM

INTERCHANGEABILITY 8
Interchangeability
Name Remarks
Model
For work equipment SAR3 – 100 + 100
For charging transmission SAR3 – 100
Hydraulic
For cooling brake SAR3 – 80
pump
For operating brake SAR1 – 25
For emergency steering SBL – 21
Flow amplifier valve HD1200E Only amplification factor is different.
Hydraulic
Hoist valve HD785-5 Electric control system is employed.
valve
Steering valve
Hydraulic Hoist cylinder
cylinder Steering cylinder
Body
Full-flow filter HD325-6
Bypass filter HD325-6
Engine Fuel filter HD325-6
HD325-6,
Corrosion resistor
HD465-5
Transmission filter WA450-3, etc. Employment of spin-on filter and double filter
HD255-5,
HD325-6,
Hydraulic oil filter
HD465-5,
HD785-5
FRG15S,
Air cleaner WA500 – 800,
PC650 – 1600
Tire
HD255-5,
Brake lining HD325-6,
WA600-3
Transmission disc WA450-3
HD325-6,
Parking brake pad HD465-5,
HD785-5
Disc for differential lock-up (Both sides)

29
 HM400.book Page 30 Saturday, May 26, 2001 10:29 PM

EXTERNAL APPEARANCE AND

9 DRAWING & PERFORMANCE CURVES
DIMENSIONS

3450 mm 11'4"
45˚

41
70
m
m
87
00

13
mm

'8"
28

7130 mm 23'5"
'7"
1600 mm 5'3" 5400 mm 17'9"

70˚
3700 mm 12'2"

2970 mm 9'9"
620 mm
26˚ 29 29 29
.5 R 25 .5 R 25 .5 R 25

2'0"
620 mm

720 mm
2690 mm 8'10" 1350 mm 2'0"

2'4"
3450 mm 11'4" 2885 mm 9'6" 4'5" 4350 mm 14'3" 1970 mm 6'6" 1820 mm
11025 mm 36'2" 6'0"

TRAVEL PERFORMANCE CURVE

103 lb 103 kg

100
50 GROSS WEIGHT
40 50 60 70 80 90 100 110 120 130 150 180 200 103 lb
80
20 30 40 50 60 70 80 90 103 kg
30 F1
60 EMPTY LOADED

TOTAL RESISTANCE (GRADE+ROLLING)(%)

35.0
20 30.0
2400 40
ENGINE SPEED (rpm)

25.0

F2 20.0
30
10 15.0
14.0
20 9 13.0
8 F3 12.0
11.0
1400 7 10.0
6 9.0
8.0
5 F4
10 7.0
4 6.0
5.0
3 F5
400 4.0
5
RIMPULL

2 F6 3.0
4

2.0
3

1
2

0 0
0 10 20 30 40 50 60 70 km/h
0 10 15 20 25 30 35 40 MPH

TRAVEL SPEED

30
HM400.book Page 31 Saturday, May 26, 2001 10:29 PM

DRAWING & PERFORMANCE CURVES 9

BRAKE PERFORMANCE
CURVES
GRADE DISTANCE:450 m (1,500 ft) GRADE DISTANCE:600 m (2,000 ft)
GROSS WEIGHT GROSS WEIGHT
3 3
0 50 100 150 200 10 lb 0 50 100 150 200 10 lb
3 3
0 10 20 30 40 50 60 70 80 90 100 10 kg 0 10 20 30 40 50 60 70 80 90 100 10 kg
EMPTY LOADED EMPTY LOADED
-40 -40
WITHOUT EXHAUST WITHOUT EXHAUST
TOTAL RESISTANCE (GRADE + ROLLING) (%)

TOTAL RESISTANCE (GRADE + ROLLING) (%)

WITH EXHAUST(OPTION) WITH EXHAUST(OPTION)
F1 -35 -35
F1

-30 -30

F1 -25 -25
F1
F2
F2
-20 -20
F2
F3 F2
-15 F3 -15
F3 F4 F3 F4
F4 F5 -10 -10
F5 F4 F5
F6
F5 F6
F6 -5 -5
F6

0 10 20 30 40 50 60 70 80 90 100 km/h 0 10 20 30 40 50 60 70 80 90 100 km/h

0 10 20 30 40 50 60 MPH 0 10 20 30 40 50 60 MPH
TRAVEL SPEED TRAVEL SPEED

GRADE DISTANCE:900 m (3,000 ft) GRADE DISTANCE:1500 m (5,000 ft)

GROSS WEIGHT GROSS WEIGHT
3 3
0 50 100 150 200 10 lb 0 50 100 150 200 10 lb
3 3
0 10 20 30 40 50 60 70 80 90 100 10 kg 0 10 20 30 40 50 60 70 80 90 100 10 kg
EMPTY LOADED EMPTY LOADED
-40 -40
WITHOUT EXHAUST WITHOUT EXHAUST
TOTAL RESISTANCE (GRADE + ROLLING) (%)

TOTAL RESISTANCE (GRADE + ROLLING) (%)

WITH EXHAUST(OPTION) WITH EXHAUST(OPTION)

-35 -35
F1
F1
-30 -30

-25 -25
F1
F1
F2
F2
-20 -20

F2
F3 -15 F2 -15
F3
F3 F4 F3
-10 F4 -10
F4 F5
F4
F5 F6 F5
-5 F5 F6 -5
F6 F6

0 10 20 30 40 50 60 70 80 90 100 km/h 0 10 20 30 40 50 60 70 80 90 100 km/h

0 10 20 30 40 50 60 MPH 0 10 20 30 40 50 60 MPH
TRAVEL SPEED TRAVEL SPEED

GRADE DISTANCE:CONTINUOUS DISCENT

GROSS WEIGHT
0 50 100 150 200 103 lb
3
0 10 20 30 40 50 60 70 80 90 100 10 kg
EMPTY LOADED
-40
WITHOUT EXHAUST
TOTAL RESISTANCE (GRADE + ROLLING) (%)

WITH EXHAUST(OPTION)
-35

F1
-30

-25

F1
F2 -20

F2 -15
F3

F3
-10
F4
F4 F5
F5 -5
F6
F6

0 10 20 30 40 50 60 70 80 90 100 km/h
0 10 20 30 40 50 60 MPH
TRAVEL SPEED
31
 HM400.book Page 32 Saturday, May 26, 2001 10:29 PM

10 COMPARATIVE SPECIFICATIONS
Manufacturer Model KOMATSU BELL CATERPILLAR MOXY
Item HM400 B40C D400E-II MT40B
FLYWHEEL HORSEPOWER: HP (kW)/rpm
Net (SAE) 430( 321)/2000 INA 405( 302)/2000 INA
Gross (SAE) 444( 331)/2000 410( 306)/2100 427( 318)/2000 450( 336)/2200
DRIVE SYSTEM 6x6 6x6 6x6 6x6
HAULING CAPACITY:
Heaped (2:1, SAE) m3(cu.yd) 22.3 (29.2) 22.0 (28.8) 21.9 (28.6) 22.2 (29.0)
Struck (SAE) m3(cu.yd) 16.5 (21.6) 17.0 (22.2) 16.5 (21.6) 17.6 (23.0)
Max. payload ton (USton) 36.5 (40.0) 36.5 (40.0) 36.3 (40.0) 36.3 (40.0)
WEIGHT:
Empty vehicle weight * kg(lb) 30300 ( 66,800) 28120 ( 61,990) 31650 ( 69,788) 27500 ( 60,626)
Front axle % 55.4 50.1 57.3 47.6
Center axle % 22.3 25.5 21.9 INA
Rear axle % 22.3 24.4 20.8 INA
Gross vehicle weight * kg(lb) 66875 ( 147,430) 64620 ( 142,460) 67950 ( 149,830) 63800 ( 140,653)
Front axle % 28.4 31.9 33.3 INA
Center axle % 35.8 34.2 33.6 INA
Rear axle % 35.8 33.9 33.1 INA
DIMENSIONS:
Overall length mm (ft.in) 11025 (36’ 2”) 10671 (35’ 0”) 10652 (34’11”) 9880 (32’ 5”)
Overall width mm (ft.in) 3450 (11’ 4”) 3380 (11’ 1”) 3430 (11’ 3”) 3505 (11’ 6”)
Overall height * mm (ft.in) 3700 (12’ 2”) 3681 (12’ 1”) 3942 (12’11”) 3760 (12’ 4”)
Ground clearance * mm (ft.in) 620 ( 2’ 0”) 619 ( 2’ 0”) 655 ( 2’ 2”) 685 ( 2’ 3”)
Loading height * mm (ft.in) 2970 ( 9’ 9”) 3179 (10’ 5”) 3102 (10’ 2”) 3200 (10’ 6”)
Height of body top * mm (ft.in) 7130 (23’ 5”) 7193 (23’ 7”) 6983 (22’11”) 6375 (20’11”)
(When dumped)
Wheelbase
Front - Center mm (ft.in) 4350 (14’ 3”) 4474 (14’ 8”) 4270 (14’ 0”) 4320 (14’ 2”)
Center - Rear mm (ft.in) 1970 ( 6’ 6”) 1950 ( 6’ 5”) 1956 ( 6’ 5”) 1955 ( 6’ 5”)
Treads * mm (ft.in) 2690 ( 8’10”) 2600 ( 8’ 6”) 2680 ( 8’10”) 2745 ( 9’ 0”)
Articulation angle (each) deg 45 42 45 45
PERFORMANCE:
Max. speed * km/h (MPH) 58.6 (36.4) 54.0 (33.6) 58.6 (36.4) 53.1 (33.0)
Turning radius:
outside vehicle mm (ft.in) 8700 (28’ 7”) INA 8440 (27’ 8”) 9450 (31’ 0”)
ENGINE:
Model Komatsu Mercedes Benz Caterpillar Scania
SAA6D140E-3 OM442LA 3406E DSI 14
Type Direct injection Direct injection Direct injection Direct injection
Turbocharged Turbocharged Turbocharged Turbocharged
Aftercooled Aftercooled
No. of cylinders - mm (in) 6 - 140 x 165 INA 6 - 137 x 165 INA
bore x stroke ( 5.51 x 6.50) ( 5.39 x 6.50)
Piston displacement ltr (cu.in) 15.24 ( 928) 14.62 ( 892) 14.60 ( 893) 14.19 ( 866)
POWER TRAIN:
Transmission Counter-shaft, Planetary, Planetary, Counter-shaft,
powershift powershift powershift powershift
Shift range F6/R2 F5/R1 F7/R1 F6/R3
Differential lock:
Axles Wet, multiple-disc (Limited slip differential) Wet, multiple-disc (Limited slip differential)
Interaxle Wet, multiple-disc Jaw clutch Wet, multiple-disc Jaw clutch
BRAKES:
Service brake Wet, multiple-disc Dry, disc Dry, disc Dry, disc
Parking brake Dry, disc Dry, disc Dry, disc Dry, disc
Retarder Wet, multiple-disc INA Exhaust brake Hydraulic
SUSPENSION:
Front Hydropneumatic Hydropneumatic Hydropneumatic Rubber

Center/Rear Hydropneumatic, Rubber Rubber Free swing

Rubber
BODY HOIST:
Hoist 2-stage, 2-cylinder INA 1-stage, 2-cylinder INA
Dumping angle deg 70 70 72 70
Dumping time sec 12 INA 12 INA
Fuel tank refill capacity ltr (USgal) 495 ( 131) 400 ( 106) 570 ( 154) 430 ( 114)
*) SPEC. CONDITIONS
• Tires size 29.5 R25 29.5 R25 29.5 R25 29.5 R25
Refer No. X25SP2001001 SPEC/129/04/00 JUN 1999-288 JUN 1999-288
32
HM400.book Page 33 Saturday, May 26, 2001 10:29 PM

COMPARATIVE SPECIFICATIONS 10
Manufacturer Model TEREX VOLVO
Item TA40 A40D
FLYWHEEL HORSEPOWER: HP (kW)/rpm
Net (SAE) 375( 280)/2100 414( 309)/1800
Gross (SAE) 400( 298)/2100 420( 313)/1800
DRIVE SYSTEM 6x6 6 x 4 (6 x 6)
HAULING CAPACITY:
Heaped (2:1, SAE) m3(cu.yd) 22.0 (28.8) 22.5 (29.4)
Struck (SAE) m3(cu.yd) 17.0 (22.2) 16.9 (22.1)
Max. payload ton (USton) 36.5 (40.0) 37.0 (40.8)
WEIGHT:
Empty vehicle weight * kg(lb) 29490 ( 65,015) 31270 ( 68,938)
Front axle % 48.2 52.1
Center axle % 25.8 INA
Rear axle % 26.0 INA
Gross vehicle weight * kg(lb) 65990 ( 145,485) 68270 ( 150,507)
Front axle % INA 28.1
Center axle % INA INA
Rear axle % INA INA
DIMENSIONS:
Overall length mm (ft.in) 10650 (34’11”) 11310 (37’ 1”)
Overall width mm (ft.in) 3430 (11’ 3”) 3432 (11’ 3”)
Overall height * mm (ft.in) 3650 (12’ 0”) 3746 (12’ 3”)
Ground clearance * mm (ft.in) 525 ( 1’ 9”) 654 ( 2’ 2”)
Loading height * mm (ft.in) 3100 (10’ 2”) 3075 (10’ 1”)
Height of body top * mm (ft.in) 6500 (21’ 4”) 7384 (24’ 3”)
(When dumped)
Wheelbase
Front - Center mm (ft.in) 4600 (15’ 1”) 4451 (14’ 7”)
Center - Rear mm (ft.in) 1970 ( 6’ 6”) 1940 ( 6’ 4”)
Treads * mm (ft.in) 2690 ( 8’10”) 2636 ( 8’ 8”)
Articulation angle (each) deg 45 45
PERFORMANCE:
Max. speed * km/h (MPH) 55.7 (34.6) 55.0 (34.2)
Turning radius:
outside vehicle mm (ft.in) 9750 (32’ 0”) 8863 (29’ 1”)
ENGINE:
Model Detroit Diesel Volvo
DD 60 D12C AAE-2
Type Direct injection Direct injection
Turbocharged Turbocharged
Aftercooled
No. of cylinders - mm (in) 6 - 130 x 160 INA
bore x stroke ( 5.12 x 6.30) INA
Piston displacement ltr (cu.in) 12.70 ( 774) 12.00 ( 732)
POWER TRAIN:
Transmission Counter-shaft, Planetary,
powershift powershift
Shift range F6/R3 F6/R2
Differential lock:
Axles (Limited slip differential) Dog clutch
Interaxle Jaw clutch Dog clutch
BRAKES:
Service brake Dry, disc Wet, multiple-disc
Parking brake Dry, disc Dry, disc
Retarder Hydraulic Exhaust, Hydraulic
SUSPENSION:
Front Hydropneumatic Rubber

Center/Rear Hydropneumatic, Rubber

Rubber
BODY HOIST:
Hoist 1-stage, 2-cylinder 1-stage, 2-cylinder
Dumping angle deg 65 70
Dumping time sec 16 12
Fuel tank refill capacity ltr (USgal) 424 ( 112) 480 ( 127)
*) SPEC. CONDITIONS
• Tires size 29.5 R25 29.5 R25
Refer No. MAY 1999-287 22 1 669 4126
33
HM400.book Page 35 Saturday, May 26, 2001 10:29 PM

This information has been gathered to provide data on the performance of KOMATSU and competitive
machines under actual job conditions. Every effort was made to ensure reliable results. However,
because of the many variables peculiar to each job (including material characteristics, operator effi-
ciency, labor and other costs, haul road conditions and altitude), neither KOMATSU LTD., nor any of its
subsidiaries or distributors can or does warrant expressly or implicitly that Komatsu or competitive
equipment referred to will achieve the performance or incur the costs indicated under other, though
similar, circumstances.

The information contained herein is intended for circulation only to Komatsu employees and to those
distributor employees, whose duties require knowledge of such reports and intended solely for the
information and training of these readers. UNAUTHORIZED USE OF THIS DOCUMENT IS HEREBY
PROHIBITED AND THOSE RESPONSIBLE FOR SUCH USE SHALL BE SOLELY RESPONSIBLE
FOR ANY DAMAGES WITH THIRD PARTIES THAT MAY INCUR AS A RESULT OF SUCH USE. Any
reproduction of this release without the foregoing explanation is prohibited.

HEBT0099

www.komatsu.co.jp Materials and specifications are subject to change without notice

is a trademark of Komatsu Ltd. Japan