Articulated haul truck

HM400-5

Gross horsepower 353 kW @ 2 000 rpm 473 HP @ 2,000 rpm
Operating weight 75 135 kg 165,644 lbs.
Capacity 40.0 mt 44.1 st

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Overview
Specifications
Service and support
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Ready for tough conditions

Move material across challenging, adverse terrain with the HM400-5 articulated truck. For job sites where roads may not exist or are not well established, this machine was designed and equipped to deliver productive, consistent performance — for operators of all experience levels.

Excellent maneuverability
Automated powertrain features
Customer-approved ride comfort
Designed for durability

Features and benefits

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Komatsu Traction Control System

Monitor and adjust to changing conditions. Komatsu Traction Control System (KTCS) is designed to provide excellent machine performance in soft and slippery ground conditions without sacrificing steering performance.

Maximize transmission life

Powerful acceleration, smooth down shifting and synchronized engine speed. The K-ATOMiCS transmission features a six-speed, fully automatic transmission with an advanced electronic system to reduce shift shock and torque cutoff for exceptional efficiency.

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Greater confidence when traveling downhill

Increase operator confidence when traveling down hill through large capacity, continuously cooled, wet multiple-disk brakes that also function as a highly responsive retarder with 684 horsepower absorption capacity.

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Smooth ride over rough terrain

Discover a smooth ride over the rough terrain with front and rear axle hydro-pneumatic suspensions. The rear axles are mounted on a dynamic equalizer structure and the entire system is designed to help reduce operator fatigue while offering a comfortable ride.

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Comfortable operator environment

Improved cab entry in front of the front axle. A curved front dash panel. Thoughtful design enhancements throughout the cab provide the operator excellent visibility and a large, quiet environment to promote productivity and comfort.

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Efficient loading

Monitor production with a standard, integrated payload meter that displays loaded material weight on the LCD monitor inside the cab. External lamps illuminate green, yellow or red as the payload increases to help prevent under and over loaded haul cycles.

Specifications for HM400-5

Full specifications

Standard equipment

Optional equipment

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US system Metric

Engine

Model	Komatsu SAA6D140E-7*
Type	Water-cooled, 4-cycle
Aspiration	Komatsu variable geometry, turbo-charged, after-cooled, cooled EGR
Number of cylinders	6
Bore	140 mm
Stroke	165 mm
Piston displacement	15.24 L
Horsepower:
SAE J1995	353 kW
ISO 9249 / SAE J1349	348 kW
Rated rpm	2 000 rpm
Fan drive type	Hydraulic
Maximum torque	2 263 Nﾕm 231 kgﾕm
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 (cyclonpack type), plus dust indicator

*EPA Tier 4 Final emissions certified

Model	Komatsu SAA6D140E-7*
Type	Water-cooled, 4-cycle
Aspiration	Komatsu variable geometry, turbo-charged, after-cooled, cooled EGR
Number of cylinders	6
Bore	5.51 in
Stroke	6.5 in
Piston displacement	928 in³
Horsepower:
SAE J1995	473 HP
ISO 9249 / SAE J1349	466 HP
Rated rpm	2,000 rpm
Fan drive type	Hydraulic
Maximum torque	1669 ft.-lbs.
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 (cyclonpack type), plus dust indicator

*EPA Tier 4 Final emissions certified

Transmissions

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-disc 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
Maximum travel speed	55.9 kph

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-disc 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
Maximum travel speed	34.7 mph

Axles

Full time all wheel drive
Final drive type	Planetary gear
Ratios:
Differential	3.727
Planetary	4.941

Full time all wheel drive
Final drive type	Planetary gear
Ratios:
Differential	3.727
Planetary	4.941

Suspension system

Front	Hydro-pneumatic suspension
Rear	Combined hydro-pneumatic and rubber suspension system

Front	Hydro-pneumatic suspension
Rear	Combined hydro-pneumatic and rubber suspension system

Steering system

Type	Articulated type, fully hydraulic power steering with two double-acting cylinders
Supplementary steering	Automatically actuated, electrically powered
Standard	ISO5010, SAE J1511
Minimum turning radius, wall to wall	8.8 m
Articulation angle	45° each direction

Type	Articulated type, fully hydraulic power steering with two double-acting cylinders
Supplementary steering	Automatically actuated, electrically powered
Standard	ISO5010, SAE J1511
Minimum turning radius, wall to wall	28 ft. 10 in
Articulation angle	45° each direction

Cab

Standard

ISO3449 (FOPS)
ISO3471 (ROPS)

Standard

ISO3449 (FOPS)
ISO3471 (ROPS)

Brakes

Service brakes	Full-hydraulic control, oil-cooled multiple-disc type on front and center axles
Standard	ISO3450
Parking brake	Spring applied, caliper disc type
Retarder	Front and center axle brakes act as retarder

Service brakes	Full-hydraulic control, oil-cooled multiple-disc type on front and center axles
Standard	ISO3450
Parking brake	Spring applied, caliper disc type
Retarder	Front and center axle brakes act as retarder

Main frame

Type	Articulated type, box-sectioned construction on front and rear Connected by strong torque tubes.

Type	Articulated type, box-sectioned construction on front and rear Connected by strong torque tubes.

Body

Capacity:
Struck	18.2 m³
Heaped (2:1, SAE)	24 m³
Payload	40 metric tons
Material - high tensile strength steel	130 kg/mm²
Material thickness:
Bottom	16 mm
Front	8 mm
Sides	12 mm
Target area - (inside length x width)	5 667 mm x 3 194 mm
Heating	Exhaust heating (option)

Capacity:
Struck	23.8 yd³
Heaped (2:1, SAE)	31.4 yd³
Payload	44.1 US tons
Material - high tensile strength steel	184,925 psi
Material thickness:
Bottom	0.63 in
Front	0.31 in
Sides	0.47 in
Target area - (inside length x width)	18 ft. 7 in x 10 ft. 6 in
Heating	Exhaust heating (option)

Hydraulic system

Hoist cylinder	Twin, telescopic type
Relief pressure	28.4 Mpa / 290 kg/cm²
Hoist time	12.0 s

Hoist cylinder	Twin, telescopic type
Relief pressure	4,119 psi
Hoist time	12.0 s

Weight (approximate)

Empty weight	35 005 kg
Gross vehicle weight	75 135 kg
Weight distribution:
Empty:	Front axle	56.9%
	Center axle	23.6%
	Rear axles	19.5%
Loaded:	Front axle	30.4%
	Center axle	35.8%
	Rear axles	33.8%

Empty weight	77,283 lbs.
Gross vehicle weight	165,644 lbs.
Weight distribution:
Empty:	Front axle	56.9%
	Center axle	23.6%
	Rear axles	19.5%
Loaded:	Front axle	30.4%
	Center axle	35.8%
	Rear axles	33.8%

Tires

Standard tire

29.5 R25

Standard tire

29.5 R25

Service refill capacities

Fuel tank	525 L
DEF tank	34.0 L
Engine oil	50 L
Torque converter, transmission and retarder cooling	125 L
Differentials (total)	108 L
Final drives (total)	32 L
Hydraulic system	167 L
Suspension (total)	21.4 L

Fuel tank	138.7 US gal
DEF tank	9.0 US gal
Engine oil	13.2 US gal
Torque converter, transmission and retarder cooling	33 US gal
Differentials (total)	28.5 US gal
Final drives (total)	8.5 US gal
Hydraulic system	44.1 US gal
Suspension (total)	5.7 US gal

ENGINE:

Air cleaner: dry type with double elements and pre-cleaner, plus dust indicator
Alternator, 24 V / 90 A
Batteries, 2 x 12 V / 160 Ah, 910 CCA
Engine, Komatsu SAA6D140E-7 (with EGR)
Hydraulically driven reversible cooling fan, after cooler
Hydraulically driven reversible cooling fan, radiator
Komatsu Diesel Particulate Filter (KDPF)
Komatsu Variable Displacement Turbocharger
Selective Catalytic Reduction (SCR)
Starting motor, 11.0 kW
Two mode power system (Power and Economy)

CAB:

2 x DC12V electrical outlets
Air conditioner
AM/FM radio with AUX terminal
Ashtray
Cigarette lighter
Color rear view monitor
Cup holder
Front wiper (with washer and intermittent)
Machine monitor (color LCD)
Operator seat, heated , reclining, air suspension type with 3-point retractable seat belt
Passenger seat with 2-point retractable seat belt
Power window (L.H)
Rear wiper (with washer)
Space for lunch box
Steering wheel, tilt and telescopic
Sun visor, front window
Tiltable ROPS cab with FOPS, sound suppression type

LIGHTING SYSTEM:

Back-up lamp
Back work lamps, LH and RH side
Front, cab mounted work lamps
Hazard lamps
Head lamps (High/Low)
LED stop, tail and turn signal lamps

GUARD AND COVERS:

Engine underguard
Exhaust muffler thermal guard
Fire prevention covers
Propeller shaft guards, front and rear
Transmission underguard

BODY:

Electronic hoist control system

TIRES:

29.5 R25

OTHER:

Alarm, backup
Anti-slip material on fenders
Auto idle stop function
Back-up alarm
Battery disconnect switch
Centralized greasing
Coolant temperature alarm and lamp
Dump counter
Ecology guidance and ecology gauge
Electric circuit breakers, 24 V
Electric priming fuel pump
Engine shutdown secondary switch
Full-automatic F6-R2 transmission with lock-up torque converter & K-ATOMiC shift control
Guard rails
Horn, electric
Hydropneumatic suspension, front and rear
Komatsu Traction Control System (KTCS)
KOMTRAX Level 5
Mud guards
Parking brake
Payload Meter (PLM)
Power cab tilt
Protective grille for rear window
Provision for tailgate installation
Heated rear view mirrors
Rear view monitoring system
Retarder/brake system
Secondary brake
Secondary engine shutdown switch
Secondary steering, automatic, electric
Side markers
Steering joint locking assembly
Step (right side) and ladder (left side)
Tool box
Under view mirrors

ENGINE:

Air cleaner: dry type with double elements and pre-cleaner, plus dust indicator
Alternator, 24 V / 90 A
Batteries, 2 x 12 V / 160 Ah, 910 CCA
Engine, Komatsu SAA6D140E-7 (with EGR)
Hydraulically driven reversible cooling fan, after cooler
Hydraulically driven reversible cooling fan, radiator
Komatsu Diesel Particulate Filter (KDPF)
Komatsu Variable Displacement Turbocharger
Selective Catalytic Reduction (SCR)
Starting motor, 11.0 kW
Two mode power system (Power and Economy)

CAB:

2 x DC12V electrical outlets
Air conditioner
AM/FM radio with AUX terminal
Ashtray
Cigarette lighter
Color rear view monitor
Cup holder
Front wiper (with washer and intermittent)
Machine monitor (color LCD)
Operator seat, heated , reclining, air suspension type with 3-point retractable seat belt
Passenger seat with 2-point retractable seat belt
Power window (L.H)
Rear wiper (with washer)
Space for lunch box
Steering wheel, tilt and telescopic
Sun visor, front window
Tiltable ROPS cab with FOPS, sound suppression type

LIGHTING SYSTEM:

Back-up lamp
Back work lamps, LH and RH side
Front, cab mounted work lamps
Hazard lamps
Head lamps (High/Low)
LED stop, tail and turn signal lamps

GUARD AND COVERS:

Engine underguard
Exhaust muffler thermal guard
Fire prevention covers
Propeller shaft guards, front and rear
Transmission underguard

BODY:

Electronic hoist control system

TIRES:

29.5 R25

OTHER:

Alarm, backup
Anti-slip material on fenders
Auto idle stop function
Back-up alarm
Battery disconnect switch
Centralized greasing
Coolant temperature alarm and lamp
Dump counter
Ecology guidance and ecology gauge
Electric circuit breakers, 24 V
Electric priming fuel pump
Engine shutdown secondary switch
Full-automatic F6-R2 transmission with lock-up torque converter & K-ATOMiC shift control
Guard rails
Horn, electric
Hydropneumatic suspension, front and rear
Komatsu Traction Control System (KTCS)
KOMTRAX Level 5
Mud guards
Parking brake
Payload Meter (PLM)
Power cab tilt
Protective grille for rear window
Provision for tailgate installation
Heated rear view mirrors
Rear view monitoring system
Retarder/brake system
Secondary brake
Secondary engine shutdown switch
Secondary steering, automatic, electric
Side markers
Steering joint locking assembly
Step (right side) and ladder (left side)
Tool box
Under view mirrors

Body, 24.0 m³, SAE 2:1 heaped, unlined floor
Body, with exhaust heating ducting, 24.0 m³, SAE 2:1 heaped, unlined floor
Spare rim, for 29.5 x 25 tire (1 rim only)
Tail gate, scissor type

Body, 31.4 yd³, SAE 2:1 heaped, unlined floor
Body, with exhaust heating ducting, 31.4 yd³, SAE 2:1 heaped, unlined floor
Spare rim, for 29.5 x 25 tire (1 rim only)
Tail gate, scissor type

Support you can count on

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Move material across challenging terrain with Komatsu's productive HM400-5 articulated truck

The HM400-5 articulated truck is designed for ease of use, productivity and reliability. The Komatsu Traction Control System (KTCS) delivers exceptional performance in soft and slippery ground conditions.