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
TRANSMISSION
Torque converter . . . . . . . . . . . . . . . . . 3-elements, 1-stage, 2-phase
Tr ansmission . . . . . . . . . . . . . . . . . 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
S
PECIFICATIONS
S
PECIFICATIONS
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%
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 in
3
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
SUSPENSION SYSTEM
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydro-pneumatic suspension
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Combined hydro-pneumatic
and rubber suspension system
MAIN FRAME
Type . . . . . . . . . . . . . . . . . . . . . . . . . Articulated type, box-sectioned
construction on front and rear
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
BODY
Capacity:
Struck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.9 m
3
16.9 yd
3
Heaped (2:1, SAE) . . . . . . . . . . . . . . . . . . . . . . . 16.6 m
3
21.7 yd
3
Payload . . . . . . . . . . . . . . . . . . . . . . 27.3 metric tons 30.1 U.S. tons
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 kg/mm
2
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/cm
2
2,990 psi
Hoist time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 sec
CAB
Dimensions comply with ISO 3471 and SAE J1040-1988c ROPS
(Roll-Over Protective Structure) standards
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
HM300-1
ARTICULATED DUMP TRUCK
9
8
Tiltable Cab
The cab can be tilted rearward to provide easy
maintenance/service for the engine and transmission.
Note: An external hydraulic pump is required to tilt the cab
or a service crane can be used after removing only
eight bolts...
E
ASY
M
AINTENANCE
E
ASY
M
AINTENANCE
The HM300-1 has been designed to keep service time down and productivity up by
having a maintenance-free oscillating hitch, a reduced number of grease points, easy
access to filters, and longer intervals between oil changes.
Fewer Grease Points
The number of grease points are minimized by using maintenance-free
rubber bushings and a maintenance-free oscillating hitch.
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