S
PECIFICATIONS
OFF-HIGHWAY TRUCK
HD255-5
7
6
O
F F
- H
I G H W A Y
T
R U C K
HD255-5
AXLES
Rear Axle type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full-floating
Final drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Planetary gear
Ratios:
Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.900
Planetary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.941
TRANSMISSION
Torque converter . . . . . . . . . . . . . . . . . 3-elements, 1-stage, 2-phase
Transmission. . . . . . . . . . . . . . . . . . . . Full-automatic, planetary type
Speed range . . . . . . . . . . . . . . . . . . 6 speeds forward and 1 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
Shift control . . . . . . . . . . . . . . . Electronic shift control with automatic
clutch modulation in all gears
Maximum travel speed . . . . . . . . . . . . . . . . . . 47.0 km/h 29.2 mph
WEIGHT (APPROXIMATE)
Empty weight . . . . . . . . . . . . . . . . . . . . . . . . . . . 22450 kg 49,490 lb
Max. gross vehicle weight:
Standard tire . . . . . . . . . . . . . . . . . . . . . . . . 47525 kg 104,770 lb
Optional tire . . . . . . . . . . . . . . . . . . . . . . . . . 48035 kg 105,900 lb
Not to exceed max. gross vehicle weight, including options, fuel
and payload.
Weight distribution:
Empty: Front axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48%
Rear axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52%
Loaded: Front axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32%
Rear axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68%
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
Flywheel horsepower
ISO 9249 / SAE J1349. . . . . . . . . . . . . . . . Gross 241 kW 323 HP
Net 235 kW 316 HP
Rated rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2100 rpm
Maximum torque . . . . . 1375 N•m 140 kg•m 1,013 lb•ft at 1,400 rpm
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, plus dust indicator
SUSPENSION SYSTEM
Independent hydropneumatic suspension cylinder with fixed throttle to
dampen vibration.
MAIN FRAME
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Box-sectioned structure
STEERING SYSTEM
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully hydraulic power steering
with two double-acting cylinders
Supplementary steering . . . . . . . Automatic control with manual switch
(meets ISO 5010, SAE J1511 and SAE J53)
Minimum turning radius . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 m 23'0"
BRAKES
Brakes meet ISO J3450 and SAE J1473 standards.
Service brakes:
Front. . . . . . . . . . . . . . . . . . . . Air-over-hydraulic, caliper disc type
Rear . . . . . . . . . . . Air-over-hydraulic, oil-cooled multiple-disc type
Parking brake . . . . . . . . . . . . Spring applied, internal-expanding brake
Retarder . . . . . . . . . . . . . . . . . . . . . . . . . Air-over-hydraulic, oil-cooled,
multiple-disc rear brakes act as retarder.
Secondary brake . . . . A relay valve automatically actuates the service
brakes when air pressure drops below
the rated level. Manual operation is also possible.
BODY
Capacity:
Struck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2 m
3
17.2 yd
3
Heaped (2:1, SAE) . . . . . . . . . . . . . . . . . . . . . . . 17.7 m
3
23.2 yd
3
Payload . . . . . . . . . . . . . . . . . . . . . . . 25 metric tons 27.6 U.S. tons
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 kg/mm
2
227,500 psi
high tensile strength steel
Structure . . . . . . . . . . . . . . . . . . . . . . . V-shape body with flat-bottom
Material thickness:
Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mm 0.98"
Front. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 mm 0.63"
Sides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 mm 0.55"
Target area
(inside length x width) . . . . . . . 4570 mm x 2995 mm 15'0" x 9'10"
Dumping angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49°
Height at full dump . . . . . . . . . . . . . . . . . . . . . . . . . . 7075 mm 23'3"
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust heating
HYDRAULIC SYSTEM
Hoist cylinder. . . . . . . . . . . . . . . . . . . Single, 3-stage telescopic type
Relief pressure . . . . . . . . . . . . . . . . 20.6 MPa 210 kg/cm
2
2,990 psi
Hoist time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 sec
CAB
Dimensions comply with ISO 3471 and SAE J1040-1988c ROPS
(Roll-Over Protective Structure) standards.
TIRES
Standard tire. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.00-25-28PR(E3)
SERVICE REFILL CAPACITIES
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374 ltr. 98.8 U.S. Gal
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 ltr. 7.1 U.S. Gal
Torque converter, transmission and
retarder cooling . . . . . . . . . . . . . . . . . . . . . . . 70 ltr. 18.5 U.S. Gal
Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 ltr. 4.8 U.S. Gal
Final drives (total) . . . . . . . . . . . . . . . . . . . . . . . . 14 ltr. 3.7 U.S. Gal
Hydraulic system . . . . . . . . . . . . . . . . . . . . . . . . 80 ltr. 21.1 U.S. Gal
Suspension (total) . . . . . . . . . . . . . . . . . . . . . . . . 30 ltr. 7.9 U.S. Gal
Standard equipment may vary for each country, and this specification sheet may contain attachments and optional equipment
that are not available in your area. Please consult your Komatsu distributor for detailed information.
STANDARD EQUIPMENT FOR BASE MACHINE
OPTIONAL EQUIPMENT
CAB:
●
Air conditioner
●
Cigarette lighter and ashtray
●
Intermittent windshield wiper
●
Passenger seat (Fabric)
●
Radio, AM / AM&FM
●
Seatbelt (Two point anchor /
78mm 3.1")
BODY:
●
Without body heating
(with muffler)
●
Body liner
GUARD AND COVERS:
●
Body spill guard (150 / 250 mm
5.9" / 9.8")
●
Engine side cover
●
Platform guard (Right hand side)
●
Radiator shutter (Canvas type)
●
Vandalism protection
LIGHTING SYSTEM:
●
Fog lamp
●
Hazard lamp
●
Side work lamps
●
Yellow beacon
TIRES:
●
16.00 R25 Radial tire
SAFETY:
●
Dumping caution buzzer
●
Fire extinguisher
●
Front brake ratio valve
MAINTENANCE:
●
Air dryer, desiccant type
●
Auto greasing system
●
Jack, 30ton 33 U.S. tons
●
Large capacity batteries (Wet type)
●
PM-clinic
GAUGE
( MEASUREMENT EQUIPMENT):
●
Revo-taco-graph
●
Tacho-graph
OTHER:
●
ARSC (Auto retard speed control)
●
Cold area arrangement (-30˚C
thru 40˚C)
●
Hot area arrangement (-20˚C
thru 50˚C)
●
Poor fuel arrangement
●
Sandy & dusty area arrangement
●
Tire chains
ENGINE:
●
Alternator 50A/24V
●
Batteries 2 x 12V 150AH
●
Komatsu SAA6D125E-3
●
Starting motor, 7.5kW
●
Engine auto preheater
CAB:
●
Floor mat
●
Foot rest
●
Reclining suspension seat
●
Retractable operator seat belt,
50mm 2" wide
●
ROPS cab
●
Sun-visor
●
Tiltable and telescopic steering
wheel
●
Tinted glass
●
Windshield washer and wiper
GUARD AND COVERS:
●
Engine under guard
●
Exhaust thermal-guard
●
Fire protective covers
●
Mudguards
●
Transmission under-guard
SAFETY:
●
Automatic supplementary
steering
●
Back up alarm
●
Exhaust retarder
●
Handrails for platform
●
Horn, electric
●
Ladders, left and right hand side
●
Rear view mirrors
●
Secondary brake
●
Under view mirror
LIGHTING SYSTEM:
●
Back-up light
●
Headlights
●
Indicator, stop and tail lights
BODY:
●
Body, 17.7m
3
23.2 yd
3
(Heaped
2:1 SAE), with exhaust heating
●
Cab, guard, left side
TIRES:
●
16.00-25-28PR
OTHER:
●
Caliper disc brake (Front)
●
Centralized greasing
●
Fully automatic transmission with
all speeds electronic modulation
●
Hydropneumatic suspension
(Front and Rear)
●
Lock ejector
●
Oil-cooled multiple disc brake
(Rear)
DIMENSIONS
2700 mm 8'10"
3200 mm 10'6"
495 mm
1'7"
280 mm
11"
7390 mm 24'3"
3600 mm 11'10"
2140 mm 7'0"
1650 mm
5'5"
7075 mm
23'3"
2940 mm
9'8"
525 mm
1'9"
2225 mm
7'4"
2995 mm
9'10"
3200 mm
10'6"
3590 mm
11'9"
3375 mm
11'1"
4570 mm
15'0"
6770 mm 22'3"
7000 mm
23'0"
49
61
515 mm
1'8"
1
6.0
0-25-28
P
R
1
6.0
0-25-28P
R
