Looking for a Komatsu website outside of North America?
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

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

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.

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.

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.

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.

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

Close all Expand all
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

Find what works for you