Max. Payload: 41.0metric tons/45.2U.S.tonsMax. Gross Vehicle Weight: 73,175k91161,3201b.

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Max. Payload: 63.0metric tons/69.4U.S.tonsMax. G ross Veh icle Wei g ht: 1 07,27 5k91236, 5001 b.

Model shown may include optional equipment

Excellent Productivity&Fuel Economya High-output Komatsu engine with low fuel consumption

HD405 : Komatsu SAA6D140E-3 engineHD605 : Komatsu SAAOD170E-2 engine

o Seven-speed, fully automatic K-ATOMiCS (Komatsu Advanced Transmission with

Optimum Modulation Control System)transm issionoOil-cooled multiple-disc retarder and optional exhaust retarder

Operator Comfort & Safety. K-ATOMiCS transmission provides smooth acceleration and decelerationo Hydropneumatic suspension for a smoother rideoWide, sound-suppressing cab ensures comfodable operator environment. Maintains constant downhill travel speed (nnSC, Option)

More Uptimeo Sturdy, well-designed frame and tough body for quarry worko Monitoring system for operational safety and reliability.Adjustment-free caliper discs used for front wheel brakes

HD405-6/HD605-5

High-output Komatsu engine:The power plant with turbocharger andaftercooler maximizes output.HD405:SAAOD140E-31 5.23liter/488HP(364kw) at 2000RpMHD605:5446D170E-223.1 Sliter /7 1 5H P(533kw) at 2000RPM

Low fuel consumption:High injection pressure creates an idealfuel-air mixture for better combustionefficiency, while the ductile cast-ironpistons greatly reduce friction loss. Foreven higher combustion efficiency, eachcylinder has four valves-two for intake,two for exhaust. The two helical intakeporls produce optimum swirl for excellentcombustion. The exhaust gas issmoothly and quickly ejected from thecombustion chamber through theexhaust ports. All this helps to make theKomatsu-built engine fuel efficient.

Helical

Automatic idling setting system(AISS):This system facilitates quick enginewarm-up and cab cooling/warming withair conditioner.When setting the system ON, engineidle speed is kept 1000 rpm whencoolant temperature is SO'C(tZZ'f) orlower. Speed automatically returns to650 rpm when coolant temperaturereaches 50"C(22"F) .

Seven-speed, fully automaticK-ATOMiCS transmission :

The K-ATOM|CS (Komatsu AdvancedTransmission with Optimum ModulationControl System) automatically selectsthe optimum gear according to vehiclespeed, engine speed and the shiftposition you've chosen. The result: thebest gear for any driving situation.

K,ATot\,4icS (Komatsu Advanced Transmission with optimumModulation Controt System)

Oil-cooled multiple-discretarder and optional exhaustretarder:The truck can be decelerated withoutfrequent use of the brakes, allowing youto travel more safely at higher speeds,even down long, steep slopes.

A More Stable Ride in a MoreManeuverable TruckLong wheelbase and wide tread:With an extra-long wheelbase, a wide treadand an exceptionally low center of gravity,the HD405-o/HD605-5 hauls loads at higherspeeds for higher productivity, and deliversexcellent driving comfort over rough terrain.

Big body: A wide target area makes foreasy loading with minimal soil spillage andmore eff icient hauling.

Small turning radius: The Macphersonstrut front suspension has a special A{ramebetween each wheel and the main frame.The wider space created between the frontwheels and the main frame increases theturning angle of the wheels. The larger thisturning angle. the smaller is the turningradius of the truck.

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Model shovm may include optional equipn€nt,

K-ATOMICS -smooth accelerati o n / deceleration :

An electronically controlled valve is provided for each clutchpack in the transmission, allowing independent clutchengagement/ disengagement. Moreover. it enables an idealchange in clutch modulation pressure and torque cut-off timingin response to traveling conditions, The result is smoothshifting and responsive acceleration.

Convenlional transmission Tc.ere cd{f; sa€k

Sturdy, well-designed frame:Cast-steel components are employed in the main frame inhigh-stress areas where loads and shocks are mostconcentrated.

Adjustment-free brakes: The front service brakes areadjustment-f ree caliper disc type.

Easy maintenanCe: Greasing points have beencentralized at three locations. Fuel and engine oil filters arealso located together on the left-hand remote mount, for easyinspection from the ground.

Reliable hydraulic system: The oil cooter is instattedbelow the retarder, improving the reliability of the hydraulicsystem during sudden temperature rises. Fufther, in addition tothe main filter, a 52-micron line filter is located at the entranceto the transmission control valve.This system helps preventsecondary faults.

Excellent footwork and durable power train:By adopting electronic modulation on all shifting points, peaktorque when shifting is reduced, raising the endurance of thepower train.

Electronic devices for excellent operation: tn theharness connection, a dual-lock connector is used to preventloosening from vibrations and contact failure. Also, the baseboards for controllers and other devices are fixed by molding (withresin), realizing high resistance to water, dust and vibration.

HD605-s:

Struck 29m3 37.9cu.yd

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Transmissionoutput torque

K-ATOMiCS

Transmissionoulput iorque

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Hydropneumatic suspension :

All four wheels have hydropneumaticsuspension with a fixed throttle dampercontrol valve that greatly reducespitching, rolling and bouncing overrough terrain.

ldeal driving position settings: The five-way adjustabteoperator seat and the tilt-telescopic steering column ensure anoptimum driving posture, for increased driving comfort andmore control over the machine's operations.

See everything in quiet comfort: Wide windows in thefront, side and back, plus plenty of space in the richlyupholstered interior, give you a quiet, comfofiable environmentfrom which to see and control every aspect of your work.

Komatsu and leading Japanese steel makers have developed a new ultrahard, wear-resistant steel with a tensilestrength of 160kg/mm2lZZl,SOOpsi), making it the hardest and most wear-resistant steel ever developed for dumptruck bodies.The material is up Io 25"/o harder than that used in previous Komatsu dump trucks, with about 2.5times the hardness of wide-ly,used liner materials anda Brinell hardness rating of500. By adopting the mate-rial in thicker plates, wehave enhanced both pro-ductivity and durability. Fur-ther, our dump trucks havelarge-capacity bodies, idealfront and rear weight'bal-ance on tires and high max-

Heaped(2:1 )

HD405-o:Struck

40m'52.3cu.yd

20m3 26.2cu.yd

Cluch enqaqement shock

Nitrogen gas

Heaped(2: 1 ) 27.3m3 35.7cu.yd

Har.der

Vehicle monitoring system makesoperation easierThe electronic display panel shows current vehicle conditions. lf anabnormality occurs, the action code and service code are displayed. Thus,vehicle operation is easier and working efficiency is higher. At the sametime, monitoring data is saved for later troubleshooilng.

Action code display functionlf an abnormality occurs on the truck, an "E"appears on theelectronic display panel with the appropriate action code,which notifies the operator how to deal with the situation.This means the operator never misses an abnormality andcan take appropriate corrective action.

M-Seruice code display andmemoryfunctionThe contents of each controller aredisplayed on the electronic displaypanel in seruice codes. The storedvehicle information can bedownloaded to a personalcomputer (service tool). Thisenables a quick response toproblems and shortensmaintenance time. This alsoshows the truck's cunent conditionand facilitates operation.

Messagcs interchangeonce evety second.

Item,'

Even il the driver downshrfts *.Whendescendinggrades,iftheVehicle,SSpeedSurpaSSeStnem@the rear brakes automatically operate, prevbnting over-runs.

The vehicle is prevented from moving backward when operating the body.

This device makes it irpo..

When running near a shift point, shiffting is smooth and automatic.

HD405-6/HD605-5

Maintaining constant downhill travel speedAuto Retard Speed Control(ARSC)ARSC is available as an option. This allows you to simply set the downhill travelspeed and go down slopes at a constant speed (travel speed permitted from brakeperformance). As a result, you can concentrate on steering. The speed can be set atincrements of 1 km/h per one click (+ $t1pp7h of setting speed) to match the optimumspeed for the slope. Also, when it is predicted that the retarder oil temperaturebecomes overheat, since the retarder oil temperature is always monitored, operatoris informed this by warning lamp.

PLM II (Memory card payload meter)This system allows the production volume and the workingconditions on the dump truck to be analyzed and controlleddirectly via a personal computer. The system can store up to2900 working cycles.

Engine exhaust retarder:The retarder capacity is 30% higher, permitting faster speeds ondownhill slopes. This improves safety and hauling performance.

Three-mode hydropneumatic suspension:To fufther enhance driving comfort, automatic three-modesuspension is available as an option. This enables the operatorto select one of three cushioning effects (SOFT, MEDIUM orHARD), depending on road conditions, for improved dampingcontrol.

Antilock braking system (ABS)Using its outstanding electronics tecnology, Komatsu is the firstin the industry to introduce ABS on construction machinery.This system prevents the tires from locking causing skiddingunder slippery conditions while applying the service brake.

Roll€ver Protective Structure (ROPS): This structureprotects the operator and cab should the truck turn over.(meets SAES1040 APR88 and ISO 3471)X The memory card, card reader and sottware for data processing are availab e as options

Cab:.Air conditioner.Ashtray and cigarette lighter.Heater and defroster.Passenger seat (fabric).RAdJO, AM/FM.Radio, AM/FM with cassette.Seat belt, 78mm width.Seat belt, 78mm width lor

passenger seat.Seat, fabric materials.Sun visor, additional.Windows and windshield,

tinted safety glassBody:.Body positioner (HD405)oSpill guard, 150mm (HD405).Spill guard, 250mm (HD405).Spill guard, 300mm (HD605)

Lighting system:.Back-up lights, addilional.Fog lights.Work lights, RH and LH sideSalety:.Additional rear view mirror

(RH).Automatic slip regulation (ASR).Antilock braking system (ABS).Auto-retard speed control

(ARSC).Buzzer, caution for dumping.Emergency steering. automatic.Front brake cut-off system.Retarder, engine exhaust.Roll-over protective structu rewith FOPSIHD4o5/87okg]IHD605/1 25okg]

rRoll-over protective structureLHD405/770kglIHD605/1 1 50kg]

.Tire stopper blocks

.Under view mirrorGauge:.Dump position alarm & warning

liqht

.Payload meter I, printer type

.Payload meter II, memory card type

.RevographoRevograph/Tachograph.TachographGuard:.Engine underguard

lHD405/25kglLHD605/65kgl

.Propeller shaft guard, front [15kg]

.Propeller shalt guard, rearIHD4o5i25kg]IHD605/40kg]

.Transmission under guardIHD4o5/95k9]IHD6o5/8okg]

Arrangement:.Batteries for cold area

arrangment (HD405).Batteries, 4X24 voll 2OO-ah

(HD605).Cold area arrangement

(-30"C thru 40"C)oHigh altitude arrangment.Poor fuel (contained water)

arrangement.Sandv and dustv area

Others:.Air dryer.Alcohol injector.Alternator, 75-ampere.Auto greasing system.Automatic mode seleclion conlrols

suspension according to roadconditions

.Cenlralized greasing

.Differential lock

.Engine side covers

.Fast fill coupler {or fuel tank

.Fire extinguisher

.Gas charge tool

.Muffler (no body heating type)

.Pl\,4 service connectors

.Radiator shutter, canvas type

.Spare pans 'for first servicing

.Reinforced ftoor guafd (R.H) [80ks]

.Tool kit

.Vandalism protection

Ioot<91It +st<91

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[ ] shows the increased weight

HD4O5-6 / HD6O5.5 SPECIFICATIONS

ENGINE

Model' ""'HD405: KOMATSU SAA6D140E-3HD605: KOMATSU SAAODl 70E-2

Type" "' Water-cooled, 4-cYcle

Aspiration' "''''Turbocharged and aftercooled

No. of cylinders" "' " " "'6Bore x stroke' " "'HD405:140 mm x 165 mm 5.5"x6'5"

HD605:170 mm x 170 mm 6.69"x6.69"

Pision displacement' 'HD405:'15.23 ltr. 930 cu inHD6O5:23.15 ltr. 1413 cu.in

Performance:Gross horsepower" ' " " " HD405: 508 HP 379 kW

HD605: 739 HP 551 kW

Flywheel horsepower' ' ' 'HD4O5:488 HP 364 kW (SAE J1349)

HD6O5:715 HP 533 kW (SAE J1349)

Rated RPM '2000 RPM

Max. torque "nD4O5.221kg-m16O0lb-fV2.17kN-m at 1400 RPM

HD605:307k9-m22351b-fV3'01 kN-m at 1 400 RPM

Fuel system' " " Direct injection

Governor " " "HD405: Electronically controlledHD605: ElectronicallY controlled

Lubrication system;Lubrication method' " " 'Gear pump, force-lubrication

Filter" . "' Full-flow tYPe

Air cleaner' ' ' ' ' ' 'Dry type with double elementsand precleaner, plus dust indicator

TRANSMISSION

Torque converter' '3-elements, 1-stage,2-phaseLockup clutch ' ' 'Wet, single-disk clutch

Transmission' " "Full-automatic, planetary geartype hydraulicallY actuated

Speed range' '7 speeds forward and one reverse

Foward' "'Torque converter drive in 1st gear,

direct drive in 1st lockup and all higher gears

Reverse' " " "Torque converter drive

Shift control ' " " " Electronic shift control with automaticclutch modulation in all gear

Max. travel speed' "'70 km/h 43.5 MPH

AXLES AND FINAL DRIVES

Final drive type"' ""PlanetaryRear axle' ' ' Full-f loating

Rations:Differential ' ""HD405: 3.125

HD605: 3.267

Planetary' ""'HD4O5:4737HD605: 5 143

SUSPENSION

lndependent, hydropneumatic suspension cylinder with fixed

throttle to dampen vibration.

Type" " " " Fully hydraulic power steerjng withtwo double-acting cYlinder

Emergency steering' ' ' 'Manual contorol

Min. turning radius' 'HD405:7.2 m 23'7"

Min. turning radius' 'HD605:8.5 m 27'11"

BRAKES

Service brakes:Front" " "Air-over-hydraulic, caliper disc type

Rear" " " "' Air-over-hydraulic, oil-cooled, multiple-disc type

Parking brake " 'spring applied, caliper disc typeactuates on driveshafi'

Retarder' .''''''Air-over-hydraulic, oil-cooled, multiple-disc type,rear brakes act as retarders.

Emergency brake" "'An emergency relay valve

automatically actuates the service brakes and parking brake when

air pressure drops below the rated level. Manual operatron is alsopossible.

FRAME

Type" " " "Box-sectioned construction

Main f rame material ' " " High-tensile-strength steel plate

BODY

Structure' " " "'V-shaPe bodY

Material ' " " "160k9/mm'227,500 PSI

high-tensile-strength steel

Heating' Exhaust heating

Material thickness:Floor.. "25 mm 0.99"

Front" "16 mm 0.64"

Sides.' "14 mm 0.55"

Target area (inside length x width) ' 'HD405:5590 mm x 3380mm18'4" x 1 1'1"

HD605:6585 mm x 3870mm21'7" x 12'8"

BODY HOIST

Hoist cylinder' ' ' ' ' 'Twin, 2-stage telescopic type

Hydraulic pump capacity''HD405:255 ltr./min. 67'4 U.S. gal/min

HD605:366 ltr./min. 96.7 U.S. gal/min

Relief valve setting" " "HD405:210 kg/cm'3,000 PSI/20.6MPaHD605:21 0 kg/cm' 3,000 PSI/20.6MPa

Hoisttime. """ HD405:10sec.HD605:10 sec.

CAPACITY

Standard body:Struck' " " " HD405:20 m" 26'2 cu.yd

HD605:29 m'37.9 cu.Yd

Heaped (2:1 ,SAE) ' 'HD405:27.3 m' 35.7 cu.ydHD605:40 m' 52.3 cu.Yd

Max. gross vehicle weight' "HD405:73175 kg 161320 lb

HD605:107275 kg 236500 lb

Not to exceed Max. gross vehicle weight, including opiions,

fuel and payload.Notes: 1. Remain under max. gross vehicle weighl and ton-kllometers per hour,

which are determined bY tires.2. Select tires that are appropriate lor vehicle operating conditions.

Parrlnad mevimrrm..'.Hn4O5'41 O metric tons 45.2 U.S. tonS

WEIGHT (approximate)

Empty weight .HD405:32050 kg 70660 lbHD605:44200 kg 97440|b

Gross vehicle weight . . . .HD405:72125k9 159010 lb with 40 ton(44 I U.S. ton) payload

HD605:104275k9 229880 Ib with 60 ton(66.2 U.S. ton) payload

Weight distribution:Empty,front axleftear axle"' 'HD4O5:45'k155%

HD605:44.5%1555%Loaded,front axlelrear axle" " " " "HD405:327"168k

HD605:32%168%

CAB AND ROPS

Dimensions comply with ISO 3471 and SAE J1040-1988cROPS (Roll-Over Protective Structure) standards. (OPTION)The cab is mounted on rubber pads and is well insulated.

DIMENSIONS

4600 15',1'[5110 16',9'

Standard, front and rear ......HD405: 18.00R33**RADIALHD605: 24.00R35**RADIAL

Coolant 'HD405:HD6O5:

Fuel tank' .....HD405:HD6O5:

Engineoil ......HD405:HD605:

Torque convefter, transmission andretardercooling. ..'..HD405:

HD605:Differential ' ....HD405:

HD6O5:Final drive (left and right) .......HD405:

HD605:Hydraulicsystem' .....HD405:

HD605:Suspension (total) .' ...HD405:

HD605:

7735 25'5"

89ltr. 23.5 U.S. gal171 ltr. 45.2 U,S. gal500ltr. 132.1 U.S. gal780|tr.206.1 U.S. gal52 ltr. 13.7 U.S. gal52ltr. 13.7 U.S.gal

90 ltr. 23.8 U.S. gal69 ltr. 18.2 U.S. gal45 ltr. 1 1.9 U.S. gal95 ltr, 25.1 U.S. gal26 ltr. 6.9 U.S. gal63 ltr. 16.6 U.S. gal

129 ltr. 34.1 U.S. gal238ltr. 62.9 U.S. gal

43.8 ltr. 11.6 U.S. gal56.4 ltr. 15.0 U.S. gal

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SERVICE REFILL CAPACITIES

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3660 1z', [4170 13'81s590 18',4'[6585 21'7',1

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Rear 2550 8'4" 13080 1 0'1 "1

3660 12't4220 13'1

3750 t2'4" 14300 14'1

STANDARD EQUIPMENTEngine:.Alternator, 50-ampere.Automatic idling setting system for

engine low idle speed control.Batteries, 2 X 1?-volt 170AH (HD405).Batteries, 2 X 1 2-voll 200AH (HD605).Engine. Komatsu S446D1 40E-3

(HD405).Engine, Komatsu SAA6D1 70E-2

(HD605).Starting motor, 1 X 11.O-kW (HD405).Staning motor,2 X 7.5-kW (HD605)

Cab:.Cab, steel, sound suppression type.Electronic display/monitoring system.Seat, belt, 50mm widlh.Seat, passenger.Seat, suspension type, reclining.Steering wheel, tiltable & telescopicLighting system:.Back-up light.Hazard lights.Headlights wtth dimmer swilch.Stop and tail lights and turn signal

Safety:rBack-up alarm.Brakes with brake oil flow controlvalve (HD605)Emergency brake:acluates allservice brakes(front, rear and parking, 3-way)

.Catwalk with hand rails

.Hand rails for platform

.Horn, electric (HD405)rHorn, air (HD605).Ladders, LH and RH side.Rear view mirrors

Others:.Body positioner (HD605).Electric circuit breaker, 24-volt.Hot area arrangement

(-20"C thru +50"C).Mud guardsoReinforced rock ejector.Reinforced lloor guard (LH).Tire guards (HD605).18.00R33 radial tires (HD405).24.00R35 radial tires (HD605)

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TFAVEL SPEED

TRAVEL PERFORMANCETo determine lravel pedormance: Read from gross weight down tothe percent of total resistance. From this we-ightresistlance point,read horizontally to the curve with the higheit obtainable speedrange, then down to maximum speed. Jsable rimpull dep'endsupon traction available and weiqht on drive wheels.

TFAVEL SPEED

BRAKE PERFORMANCETo determine brake performance: These curves are provided toestablish the maximum speed and gearshift positioh for saferdescents,,on roads.with a given distance. Bead irom gross weightdown to the percent of total resistance. From this weiq6t resistan;epoint,. read horizontally to the curve with the highe"st obtainablespeed range, then down to maximum descent spee"d the brakes cansafely handle wlthout exceeding cooling capacity.

HD4O5Grade distance: 4S0 m (1480 ft)

GROSS WEIGHT50 100 150 2AO x 10rlb

I 1.0 20 30 40 50 60 70 80 90 100 .lorkg

r0 20 30 40 50 60 MPH

TBAVEL SPEED

HD6O5

Grade distance: 450 m (1480 ft)GROSS WEIGHT

0 50 100 150 200 250 300 350 400 x i03tb-+

TBAVEL SPEED

Pedormance line:Solid lines... Exhaust retarde(OpTlON)

HD4O5Grade distance: 900 m (2950 ft)

HD4O5Grade distance: Continuous Descent

GROSS WEIGHT0 s0 100 150 200 x 103tb

o- i! 4-39 f T 80 eo loo xio'ks

20 30 40

TRAVEL SPEED

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HD6O5Grade distance: Continuous Descent

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HD6O5Grade distance: 900 m (2950 ft)

GROSS WEIGHT0 50 100 T50 200 250 300 350 400 x 103 b-+

30 40 50 60 N,PH

TBAVEL SPEED TRAVEL SPEED

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