HM300-1 ARTICULATED DUMP TRUCK SPECIFICATION

The HM300-1 offers all around maximum productivity with faster travel speed and
many features that enhance efficiency, while reducing maintenance costs. From
construction sites to landfill - the HM300-1 excels.

SPECIFICATIONS HM300-1

ENGINE
Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D125E-3
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water-cooled, 4-cycle
Aspiration. . . . . . . . . . . . . . Turbo-charged and air-to-air after-cooled
Number of cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 mm 4.92"
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mm 5.91"
Piston displacement. . . . . . . . . . . . . . . . . . . . . . . . . 11.04 ltr 674 in3

Performance:
Gross horsepower. . . . . . . . . . . . . . . . . . . . . . . . 250 kW 335 HP
Flywheel horsepower. . . . . . . . . . . . . . . . . . . . . . 242 kW 324 HP
Rated rpm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 rpm
Maximum torque. . . . . . . . . . . . . . . . . . . . . . . 160 kg•m 1,157 lb.ft
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 (cyclopack type), plus dust indicator

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
Maximum travel speed . . . . . . . . . . . . . . . . . .59.0 km/h 36.7 mph

AXLES
Full time all wheel drive with limited slip differential in all axles.
Final drive type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Planetary gear

Ratios:
Differential. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.154
Planetary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.667

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
Minimum turning radius, wall to wall. . . . . . . . . . . . . . . . . 7.96 m 26'1"
Articulation angle. . . . . . . . . . . . . . . . . . . . . . . . . . . 45°each direction

BRAKES
Service brakes. . . . . . . . . . . . . . . . . . Full-hydraulic control, oil-cooled multiple-disc type
Parking brake. . . . . . . . . . . . . . . . . . . Spring applied, caliper disc type
Retarder. . . . . . . . . . . . . . Front and center axle brakes act as retarder
Type. . . . . . . . . . . . . . . . . . . . . . . . . Articulated type, box-sectioned construction on front and rear

BODY
Capacity:
Struck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.9 m3 16.9 yd3
Heaped (2:1, SAE). . . . . . . . . . . . . . . . . . . . . . . 16.6 m3 21.7 yd3
Payload. . . . . . . . . . . . . . . . . . . . . . 27.3 metric tons 30.1 U.S.tons
Material. . . . . . . . . . . . . . . . . . . . . . . . . . . 130 kg/mm2 184,925 psi
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). . . . . . . 5240 mm x 2685 mm 17'2" x 8'10"
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust heating (option)

HYDRAULIC SYSTEM
Hoist cylinder. . . . . . . . . . . . . . . . . . . . Twin, 2-stage telescopic type
Relief pressure. . . . . . . . . . . . . . . . . 20.6 Mpa 210 kg/cm2 2,990 psi
Hoist time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 sec

CAB
Dimensions comply with ISO 3471 and SAEJ1040-1988c ROPS (Roll-Over Protective Structure) standards

WEIGHT (APPROXIMATE)
Empty weight. . . . . . . . . . . . . . . . . . . . . . . . . . 22500 kg 49,600 lb
Gross vehicle weight. . . . . . . . . . . . . . . . . . . . . 49875 kg 109,960 lb

Weight distribution:
Empty:Front axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56.8%
Center axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.2%
Rear axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.0%
Loaded:Front axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29.8%
Center axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35.7%
Rear axles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.5%

TIRES
Standard tire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.5 R25

SERVICE REFILL CAPACITIES
Fuel tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . 382 ltr. 100.9 U.S.Gal
Engine oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ltr. 9.2 U.S.Gal
Torque converter, transmission and
retarder cooling. . . . . . . . . . . . . . . . . . . . . . 77.5 ltr. 20.5 U.S.Gal
Differentials (total). . . . . . . . . . . . . . . . . . . . . . . . 50 ltr.13.2 U.S.Gal
Final drives (total). . . . . . . . . . . . . . . . . . . . . . . . . 27 ltr. 7.1 U.S.Gal
Hydraulic system. . . . . . . . . . . . . . . . . . . . . . . 120 ltr. 31.7 U.S.Gal
Suspension (total). . . . . . . . . . . . . . . . . . . . . . . 10.4 ltr. 2.7 U.S.Gal

DIMENSIONS





STANDARD EQUIPMENT FOR BASE MACHINE
ENGINE:
● Alternator, 50A/24V
● Batteries, 2 x 12V/112Ah
● Engine, Komatsu SAA6D125E-3
● Exhaust muffler
● Starting motor, 1 x 7.5 kW

CAB:
● Ashtray
● Cigarette lighter
● Cup holder
● Electronic hoist control system
● Electronic maintenance display/monitoring 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 windows
● Space for lunch box
● Steering wheel, tilt and telescopic
● Sun visor, front window
● Tiltable ROPS cab with FOPS, sound suppression type
● Two doors, left and right

LIGHTING SYSTEM:
● Back-up light
● Hazard lights
● Headlights with dimmer switch
● Indicator, stop and tail lights

GUARD AND COVERS:
● Engine underguard
● Exhaust/muffler thermal guard
● Fire prevention covers
● Propeller shaft guards, front and rear
● Transmission underguard

SAFETY EQUIPMENT:
● Alarm, backup
● Anti-slip material on fenders
● Automatic supplementary steering
● Coolant temperature alarm and light
● Hand rails for platform
● Horn, electric
● Ladders, left and right hand side
● Protective grille for rear window
● Rearview mirrors
● Steering joint locking assembly
● Under view mirror

OTHER:
● Centralized greasing
● Limited slip differentials in all axles
● Electric circuit breaker, 24V
● Mud guards
● Side marker

BODY:
● Electronic hoist control system

TIRES:
● 23.5 R25

OPTIONAL EQUIPMENT
CAB:
● Air conditioner
● Radio, AM
● Radio, AM/FM
● Radio, AM/FM with cassette

BODY:
● Body liner
● Body exhaust heating kit
● Rock body
● Tail gate, 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/24V
● Autogreasing system
● Fire extinguisher
● Gas charge tool
● Radiator shutter, canvas type
● Spare parts for first service
● Tool kit
● Vandalism protection

TIRES:
● 30/65 R25 (750/65 R25)

Source : Komatsu