Page 1
DIMENSIONS
2
9
.
5
R
2
5
2
9
.
5
R
2
5
2
9
.
5
R
2
5
2690 mm 8'10"
1600 mm 5'3"
1350 mm
4'5"
1970 mm 6'6"
720 mm
2'4"
620 mm
2'0"
7130 mm 23'5"
3450 mm 11'4"
4350 mm 14'3"
1820 mm
6'0"
620 mm
2'0"
3450 mm 11'4"
2885 mm 9'6"
45˚
26˚
70˚
11025 mm 36'2"
5400 mm 17'9"
4
1
7
0
m
m
1
3
'8
"
8
7
0
0
m
m
2
8
'7
"
2970 mm 9'9"
3700 mm 12'2"
F1
F2
F3
F4
F5
F6
706050403020100
0 10152025303540
0
3
5
6
7
8
9
10
20
30
40
50
100
60
80
40
30
20
10
5
4
3
2
0
50 60 70 80 90
100 110 120 130 150 180 200
2
1
4
20 30 40 50 60 70 80 90
LOADED
EMPTY
GROSS WEIGHT
TRAVEL SPEED
RIMPULL
TOTAL RESISTANCE (GRADE+ROLLING)(%)
35.0
30.0
25.0
20.0
15.0
14.0
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
10
3
lb
10
3
lb
10
3
kg
10
3
kg
km/h
MPH
010
0 102030405060
20 30 40 50 60 70 80 90 100 km/h
0
0 50 100 150 200
10 20 30 40 50 60 70 80 90 100 10
3
kg
103 lb
MPH
-10
-15
-20
-25
-30
-5
-35
-40
-45-50
TRAVEL SPEED
TOTAL RESISTANCE (GRADE + ROLLING) (%)
GRADE DISTANCE : COUNTINUOUS DESCENT
F1
F1
F2
F3
F4
F5
F6
F2
F3
F4
F5
F6
WITHOUT EXHAUST
EMPTY LOADED
WITH EXHAUST(OPTION)
TRAVEL PERFORMANCE
BRAKE PERFORMANCE
CEN00343-00
Standard equipment may vary for each country, and this specification sheet may contain attachments and optional equipment that are not available in your area.
Please consult your Komatsu distributor for detailed information.
Printed in Japan 200807 IP.As(05)
GROSS HORSEPOWER
331 kW 444 HP
NET HORSEPOWER
321 kW 430 HP
MAXIMUM GVW
66,875 kg 147,435 lb
Photo may include optional equipment
ARTICULATED DUMP TRUCK
HM400-1
HM
400
Page 2
Lubrication-Free Oscillating Hitch
The lubricant-free oscillating hitch
means lower operating costs.
3
HM400-1
ARTICULATED DUMP TRUCK
Hydropneumatic Suspension
for All Terrain
The hydropneumatic suspension
assures a comfortable ride even
over rough terrain.
Interaxle & Differential Locks for
Excellent Traction in Rough Terrain
The oil-cooled multiple-disk interaxle lock
and differential locks can be turned on
and off during travelling.
Also the differential locks can lock up all
3-axles differentials for maximum traction.
Komatsu Designed Electronically Controlled
Transmission for a Comfortable Ride
F6-R2 counter-shaft type transmission with
K-ATOMiCS (Komatsu Advanced Transmission
with Optimum Modulation Control System).
Reliable Wet Type Multiple-Disk Brake and
Retarder
● Fully hydraulically controlled wet multiple-disk
brake.
● Retarder Absorbing Capacity (continuous descent):
405 kW 544 HP
583 kW 782 HP (with optional exhaust retarder)
Easy-to-Load Body
● Heaped capacity: 22.3 m329.2 yd
3
● Low loading height: 2970 mm 9'9"
● Robust body constructed of thick wear-resistant
steel having 400 Brinell hardness.
GROSS HORSEPOWER
331 kW 444 HP @ 2000 rpm
NET HORSEPOWER
321 kW 430 HP @ 2000 rpm
MAXIMUM GVW
66,875 kg 147,435 lb
2
HM400-1 Articulated Dump Truck
W
ALK
-A
ROUND
W
ALK
-A
ROUND
Tiltable Cab
The cab can be tilted rearward to provide easy
service.
Wide, Spacious Cab
● The wide cab offers a comfortable operator
environment.
● 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"
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
Page 3
Interaxle & Differential Locking
Systems
The full-time six-wheel drive system
reduces slippage. A wet multiple-disk
interaxle clutch also locks the three axles
in unison for greater traction. The interaxle
lock and differential locks can be
switched on and off while the truck is
travelling, thereby boosting productivity.
In addition, the differential lock switch,
which is a three position switch, can
lock up the rear axle differentials only,
or all axles for
maximum
performance in the
worst conditions.
Fully Hydraulically Controlled
Wet Multiple-Disk Brakes and Retarder
Wet multiple-disk brakes have been proven on
Komatsu dump trucks and wheel loaders. They
ensure highly reliable and stable brake
performance. The large-capacity wet-multiple disk
brakes also function as a highly responsive retarder
which gives the operator great confidence while
travelling downhill.
Retarder Absorbing Capacity (continuous descent):
405 kW 544 HP
583 kW 782 HP (with optional exhaust retarder)
Large Capacity Body and Box
Section Frame Structure
The 22.3 m329.2 yd3heaped capacity
is among the highest in its class, and
the low loading height of 2970 mm 9'9"
enables easy loading. The body is built
of thick wear-resistant steel with a
Brinell hardness of 400, and the body
shape provides excellent load stability.
Rugged enough for the toughest jobs,
the HM400's frame is designed using a
rigid box structure with high strength
low alloy steel.
Articulated Steering
Fully hydraulic articulated
steering offers
low-effort operating
performance and
maneuverability.
A minimum turning radius
of only 8.7 m 28' 7"
provides the freedom to
move about in confined areas.
Komatsu Designed Electronically Controlled
Transmission
Komatsu designed Electronically Controlled Transmission called
K-ATOMiCS has been successfully employed in Komatsu's rigid
dump trucks. The electronic clutch modulation system ensures
proper clutch pressure when the clutch is engaged. The total
control system controls both the engine and transmission
by monitoring the vehicle conditions. This high
technology system assures smooth shifts
without shock.
5
HM400-1
ARTICULATED DUMP TRUCK
4
The combination of high travel speeds and an efficient engine with low emissions
delivers maximum productivity at the lowest cost.
P
RODUCTIVITY
F
EATURES
P
RODUCTIVITY
F
EATURES
High Performance SAA6D140E-3 Engine
This engine delivers faster acceleration and
higher travel speeds with the highest horsepower
per ton in its class. Advanced technology, such
as high-pressure electronic controlled injection
system (CRI), air to air aftercooler and an
efficient turbocharger enabling the engine to suit
low emission. High torque at low speed,
impressive acceleration and low fuel
consumption ensure maximum productivity.
8.7 m 28'7"
Hydropneumatic Suspension
The hydropneumatic suspension has been proven on
Komatsu's rigid dump trucks. The front axle suspension
employs "De Dion" type design, allowing the machine to
ride more smoothly over bumps. The rear-axles are
mounted on a dynamic equalizer structure equipped
with hydropneumatic suspension. The entire vehicle's
suspension system responds
to the ground conditions.
The suspension delivers a
comfortable ride and
maximizes the productivity.
Page 4
7
Tiltable Cab
The cab can be tilted
rearward to provide easy
maintenance/service for the
engine and transmission.
Note: An external hydraulic
pump is required to tilt the
cab.
E
ASY
M
AINTENANCE
E
ASY
M
AINTENANCE
The HM400-1 has been designed to keep service time down and productivity up by
having a lubrication-free oscillating hitch, a reduced number of grease points, easy
access to filters, and longer intervals between oil changes.
Fewer Grease Points
We have minimized the
number of grease points by
using maintenance-free
rubber bushings and a
lubrication-free oscillating
hitch.
Taper roller bearingOil seal
Guards
The following guards are provided as standard:
● Protective grille for rear window
● Engine underguard
● Transmission underguard
● Propeller shaft guards
● Exhaust thermal guard
● Fire prevention covers
Extended Service Intervals
In order to minimize operating costs service
intervals have been extended.
● Engine oil: 500 hours
● Transmission oil: 1000 hours
● Engine & transmission filters: 500 hours
6
O
PERATOR
E
NVIRONMENT
O
PERATOR
E
NVIRONMENT
Wide, Spacious Cab
The wide cab provides a comfortable space for the
operator and a full size buddy seat. Large, electrically
operated windows and the operator's seat positioned to
the left side ensure superior visibility.
Ergonomically Designed Cab
The ergonomically designed operator's compartment
makes it very easy and comfortable for the operator to use
all the controls. The result is more confident operation by
operators and greater productivity.
Viscous Cab Mounts
Viscous mounts reduce the noise
transmitted to the cab and achieve
a quiet 76 dB(A) noise level.
Steering Wheel and Pedals
Low effort pedals reduce driver fatigue when working
continuously for long periods. The tiltable, telescoping
steering column enables operators to maintain the
optimum driving position at all times.
Built-in ROPS/FOPS
These structures conform to ISO 3471 and SAE J10401988 standards.
Hydropneumatic Suspension for All Terrain
The hydropneumatic suspension assures a comfortable
ride even over rough terrain and ensures maximum
productivity and operator confidence.
Air Suspension Seat
The air suspension fabric covered seat which is adjustable
to the operator's weight is provided as standard. The air
suspension seat dampens vibrations transmitted from the
machine and reduces operator fatigue as well as holding
the operator securely to assure confident operation.
Electric Body Dump Control Lever
The extra light lever makes dumping easier than ever.
Supplementary Steering and Secondary Brakes
Supplementary steering and secondary brakes are
standard features.
Steering: ISO 5010-1992, SAE J1511
Brakes: ISO 3450-1996, SAE J1473
Easy-to-See Instrument Panel
The instrument panel makes it easy to monitor critical
machine functions. In addition a caution light warns the
operator of any problems that may occur. Problems are
recorded in the monitor and indicated as servic codes.
This makes the machine very friendly and easy to service.
Komatsu has developed a state-of-the-art, wide
comfortable cab. The low level of vibration and noise
ensures maximum productivity from the operator.
Page 5
HM400-1
ARTICULATED DUMP TRUCK
STANDARD EQUIPMENT
OPTIONAL EQUIPMENT
8
Cab:
● Air conditioner
● Radio, AM
● Radio, AM/FM
● Radio, AM/FM with cassette
Body:
● Body liner
● Body exhaust heating kit
● Rock body
● Tailgate, wire type
● Upper side extension, 200 mm 8”
Lighting system:
● Fog lights
● Back work lights, left and right side
● Yellow beacon
Safety:
● Additional retarder, engine exhaust
● Rear view camera and monitor
Gauge:
● Engine oil filter warning alarm and
light
Arrangement:
● Batteries for cold area arrangement
● Cold area arrangement
(from -30˚C –22˚F to -40˚C -40˚F)
● Poor fuel (contained water)
arrangement
● Sandy and dusty area arrangement
Other:
● Alternator, 75A
● Auto-greasing system
● Fire extinguisher
● Gas charge tool
● Radiator shutter, canvas type
● Spare parts for first service
● Tool kit
● Vandalism protection
Tires:
● 875/65 R29
Engine:
● Alternator, 50A/24V
● Batteries, 2 x 12V 170AH
● Exhaust muffler
● Komatsu SAA6D140E-3
● Starting motor, 1 x 11.0 kW
Cab:
● Ashtray
● Can holder
● Cigarette lighter
● Electronic display/monitoring system
● Electronic hoist control system
● Heater and defroster
● Operator seat, reclining, air
suspension type with retractable 78 mm
3” width seat belt
● Passenger seat with retractable seat belt
● Power window
● Tiltable ROPS Cab with FOPS, sound
suppression type
● Space for lunch box
● Steering wheel, tilt & telescopic
● Sun visor, front window
● Two doors, left and right
Lighting system:
● Back-up light
● Hazard lights
● Headlights with dimmer switch
● Indicator and stop and tail lights
Safety:
● Anti-slip material on fenders
● Automatic supplementary steering
● Back-up alarm
● Coolant temperature alarm and light
● Hand rails for platform
● Electric horn
● Ladders, left and right side
● Protective grille for rear window
● Rear view mirrors
● Steering joint locking assembly
● Under view mirror
Guards:
● Engine underguard
● Exhaust muffler thermal guard
● Fire prevention covers
● Propeller shaft guards, front and rear
● Transmission underguard
Other:
● Centralized greasing
● Differential locks in all axles, clutch
type
● Electric circuit breaker, 24V
● Mud guards
● Side marker
Body:
● Electronic hoist control system
Tires:
● 29.5 R25
AXLES
Full time all wheel drive with 100% differential lock in all axles.
Final drive type . . . . . . . . . . . . . . . . . . . . . . . . Planetary gear
Rations:
Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.417
Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.941
TRANSMISSION
Torque converter . . . . . . . . . . . . 3-elements, 1-stage, 2-phase
Transmission . . . . . . . . . . . Full-automatic, counter-shaft type
Speed range . . . . . . . . . . . . . 6 speeds forward and 2 reverse
Lockup clutch. . . . . . . . . . . . . . . . . . . . Wet, single-disk clutch
Forward . . . . . . . . . . . . . Torque converter drive in 1st gear,
direct drive in 1st lockup and all higher gears
Reverse . Torque converter drive and direct drive in all gear
Shift control . . . . . . . . . Electronic shift control with automatic
clutch modulation in all gear
Max. travel speed . . . . . . . . . . . . . . . . . 58.6 km/h 36.4 MPH
S
PECIFICATIONS
S
PECIFICATIONS
WEIGHT (APPROXIMATE)
Empty weight . . . . . . . . . . . . . . . . . . . . . 30300 kg 66,800 Ib.
Gross vehicle weight. . . . . . . . . . . . . . . 66875 kg 147,435 Ib.
Weight distribution:
Empty: front axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55%
rear axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45%
Loaded: front axle . . . . . . . . . . . . . . . . . . . . . . . . . . . 28%
rear axles . . . . . . . . . . . . . . . . . . . . . . . . . . . 72%
ENGINE
Model. . . . . . . . . . . . . . . . . . . . . . . KOMATSU SAA6D140E-3
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . Water-cooled, 4-cycle
Aspiration. . . . . . . . . Turbo-charged and air-to-air after-cooled
No. of cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore x stroke . . . . . . . . . . . 140 mm x 165 mm 5.51" x 6.50"
Piston displacement . . . . . . . . . . . . . . . . . . . . 15.2 ltr. 928 in
3
Performance:
Gross horsepower . . . . . . . . . . . . . . . . . . 331 kW 444 HP
Flywheel horsepower . . . . . . . . . . . . . . . . . 321 kW 430 HP
Rated RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 RPM
Max.torque . . . . . . . . . . . . . . . . . . . . . . 208.5 kg·m 1,508 ft.lb
Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct injection
Governor . . . . . . . . . . . . . . . . . . . . . . Electronically controlled
Lubrication system
Method . . . . . . . . . . . . . . . . . . Gear pump, force-lubrication
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full-flow type
Air cleaner . . . . . . . . . . . . Dry type with double elements and
precleaner, plus dust indicator
SUSPENSION SYSTEM
Front . . . . . . . . . . . . . . . . . . . . . . . Hydropneumatic suspension
Rear . . . . . . . . . . . . . . . Combined hydropneumatic suspension
and rubber suspension system
MAIN FRAME
Type . . . . . . . . . . . . . . . . . . . . Articulated type, box-sectioned
construction on front and rear
STEERING SYSTEM
Type. . . . . . . . . . Articulated type, fully hydraulic power steering
with two double-acting cylinders
Supplementary steering. . . . . . . . . . . . . Automatically actuated,
electrically powered
Minimum turning radius, wall to wall . . . . . . . . . . . . 8.7 m 28' 7"
Articulation angle. . . . . . . . . . . . . . . . . . . . . . 45˚ each direction
BRAKES
Service brakes . . . . . . . . . . . . Full-hydraulic control, oil-cooled,
multiple-disc type on all wheels
Parking brake . . . . . . . . . . . . . Spring applied, caliper disc type
Retarder . . . . . . . . Front and center axle brakes act as retarder
BODY
Capacity:
Struck . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 m
3
21.6 cu.yd
3
Heaped(2:1, SAE) . . . . . . . . . . . . . . . . 22.3 m329.2 cu.yd
3
Payload . . . . . . . . . . . . . . . . . 36.5 metric tons 40 U.S. tons
Material. . . . . . . . . . . . . . . . . . . . . . 130 kg/mm
2
184925 PSl
high-tensile-strength steel
Material thickness:
Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 mm 0.63"
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm 0.31"
Sides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm 0.47"
Target area (inside length x width) . . . . . . . . . . . . . . . . . . . . .
5629 mm x 3194 mm 18' 6" x 10' 6"
Heating . . . . . . . . . . . . . . . . . . . . . . Exhaust heating, (option)
HYDRAULIC SYSTEM
Hoist cylinder . . . . . . . . . . . . . . Twin, 2-stage telescopic type
Relief pressure . . . . . . . . . . 20.6 Mpa 210 kg/cm
2
2,990 PSl
Hoist time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 sec
CAB
Dimensions comply with ISO 3471 and SAE J1040-1988c
ROPS (Roll-Over Protective Structure) standards
TIRES
Standard tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.5 R25
SERVICE REFILL CAPACITIES
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . 495 ltr. 130.8 U.S. gal
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . 52 ltr. 13.7 U.S. gal
Torque converter, transmission and
retarder cooling . . . . . . . . . . . . . . . . . 115 ltr. 30.4 U.S. gal
Differentials (total). . . . . . . . . . . . . . . . . 54.5 ltr. 14.4 U.S. gal
Final drives (total) . . . . . . . . . . . . . . . . . . . 35 ltr. 9.2 U.S. gal
Hydraulic system . . . . . . . . . . . . . . . . . . 180 ltr. 47.6 U.S. gal
Suspension (total). . . . . . . . . . . . . . . . . . 28.4 ltr. 7.5 U.S. gal
HM400-1
ARTICULATED DUMP TRUCK
9
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