Komatsu Trucks HM400-3

HM400-3 Articulated Truck

The 44 ton capacity HM400-3 has a Tier 4 interim Komatsu engine which, combine with other energy saving improvements, can reduce fuel consumption up to 14%. The Komatsu Traction Control System ensures that a loaded HM400-3 will be able to pull through the most severe underfoot conditions. The operator can choose between Economy and Power modes to further tailor his machine performance to the job at hand. Among the cab improvements are a forward facing training seat and separate screen for the rear view camera.

Engine
Model		Komatsu SAA6D140E-6*
Type		Water-cooled, 4-cycle
Aspiration		Komatsu variable geometry, turbo-charged, after-cooled, cooled EGR
Number of cylinders		6
Bore	5.51"	140 mm
Stroke	6.5"	165 mm
Piston displacement	928 in³	15.24 ltr
Horsepower :
SAE J1995	473 HP	353 kW
ISO 9249 / SAE J1349	469 HP	350 kW
Rated rpm		2000 rpm
Fan drive type		Hydraulic
Maximum torque	1669 ft lbs	2263 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 Interim and EU stage 3B 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	34.7 mph	55.9 km/h

Axles
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

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	28' 10"	8.8 m
Articulation angle		45° each direction

Cab
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

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

Body
Capacity:
Struck16.9	23.8 yd³	18.2 m³
Heaped (2:1, SAE)	31.4 yd³	24 m³
Payload	44.1 U.S. tons	40 metric tons
Material - high tensile strength steel	184,925 psi	30 kg/mm²
Material thickness:
Bottom	0.55"	14 mm
Front	0.31"	8 mm
Sides	0.47"	12 mm
Target area - (inside length x width)	18' 7" x 10' 6"	5667 mm x 3194 mm
Heating		Exhaust heating (optional)

Hydraulic System
Hoist cylinder		Twin, telescopic type
Relief pressure	4264 psi	275 kg/cm² / 27 Mpa
Hoist time		12.0 sec

Weight (approximate)
Empty weight	74,207 lbs	33,660 kg
Gross vehicle weight	162,569 lbs	73,740 kg
Weight distribution:
Empty:
Front axle		56.4%
Center axle		22.5%
Rear axles		21.1%
Loaded:
Front axle		29.4%
Center axle		35.4%
Rear axles		35.2%

Tires
Standard tire	29.5 R25

Service Refill Capacities
Fuel tank	136.8 U.S. gal	518 L
Engine oil	9.3 U.S. gal	35 L
Torque converter, transmission and retarder cooling	33 U.S. gal	125 L
Differentials (total)	28.5 U.S. gal	108 L
Final drives (total)	8.5 U.S. gal	32 L
Hydraulic system	44.1 U.S. gal	167 L
Suspension (total)	5.7 U.S. gal	21.4 L