KOMATSU HM250-2 ENGINE SPECIFICATION

HM250-2 KOMATSU ENGINE SPECIFICATION
Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D125E-5
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water-cooled, 4-cycle
Aspiration. . . . . . . . . . . . . Turbo-charged, after-cooled, cooled EGR
Number of cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 mm 4.92"
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mm 5.91"
Piston displacement. . . . . . . . . . . . . . . . . . . . . . . . 11.04 ltr. 674 in3

Horsepower
SAE J1995. . . . . . . . . . . . . . . . . . . . . . . . Gross 232 kW 311 HP
ISO 9249 / SAE J1349. . . . . . . . . . . . . . . . . Net 222 kW 298 HP
Rated rpm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 rpm
Fan drive type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical
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

HM250-2 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. . . . . . . . . . . . . . . . . . 57.6 km/h 35.8 mph

HM250-2 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

HM250-2 SUSPENSION SYSTEM
Front. . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydro-pneumatic suspension
Rear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Combined hydro-pneumatic and rubber suspension system

STEERING SYSTEM HM250-2
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 HM250-2
Service brakes. . . . . . . . . . . . . . . . . . Full-hydraulic control, oil-cooled multiple-disc type on front and center axles
Parking brake. . . . . . . . . . . . . . . . . . . Spring applied, caliper disc type
Retarder. . . . . . . . . . . . . . Front and center axle brakes act as retarder

HM250-2 MAIN FRAME
Type. . . . . . . . . . . . . . . . . . . . . . . . . Articulated type, box-sectioned construction on front and rear
Connected by strong torque tubes

HM250-2 BODY
Capacity:
Struck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 m3 14.5 yd3
Heaped (2:1, SAE). . . . . . . . . . . . . . . . . . . . . . . 14.7 m3 19.2 yd3
Payload. . . . . . . . . . . . . . . . . . . . . 24.0 metric tons 26.5 U.S.tons
Material. . . . . . . . . . . . . . . . . . . . . . . . . . . 130 kg/mm2 184,925 psi high tensile strength steel
Material thickness:
Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 mm 0.55"
Front. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm 0.31"
Sides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm 0.47"
Target area
(inside length x width). . . . . . . 4975 mm x 2685 mm 16'4" x 8'10"
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust heating (option)

HM250-2 HYDRAULIC SYSTEM
Hoist cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . Twin, 1-stage type
Relief pressure. . . . . . . . . . . . . . . . . 20.6 MPa 210 kg/cm2 2,990 psi
Hoist time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 sec

HM250-2 CAB
Dimensions comply with ISO 3471 ROPS (Roll-Over Protective Structure) standards

HM250-2 WEIGHT (APPROXIMATE)
Empty weight. . . . . . . . . . . . . . . . . . . . . . . . . . 23,600 kg 52,030 lb
Gross vehicle weight. . . . . . . . . . . . . . . . . . . . 47,680 kg 105,120 lb
Weight distribution:
Empty:Front axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57.6%
Center axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.8%
Rear axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.6%
Loaded:Front axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.3%
Center axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35.4%
Rear axle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.3%

HM250-2 TIRES
Standard tire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.5 R25

HM250-2 SERVICE REFILL CAPACITIES
Fuel tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . 384 ltr. 101.5 U.S.Gal
Engine oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ltr. 9.8 U.S.Gal
Torque converter, transmission and retarder cooling. . . . . . . . . . . . . . . . . . . . . 77.5 ltr. 20.5 U.S.Gal
Differentials (total). . . . . . . . . . . . . . . . . . . . . 63.5 ltr. 16.8 U.S.Gal
Final drives (total). . . . . . . . . . . . . . . . . . . . . . . . 24 ltr. 6.3 U.S.Gal
Hydraulic system. . . . . . . . . . . . . . . . . . . . . . . 120 ltr. 31.7 U.S.Gal
Suspension (total). . . . . . . . . . . . . . . . . . . . . . . 8.4 ltr. 2.2 U.S.Gal

DIMENSIONS HM250-2



HM250-2 STANDARD EQUIPMENT FOR BASE MACHINE
ENGINE:
● Alternator, 50A/24V
● Batteries, 2 x 12V/136Ah
● Engine, Komatsu SAA6D125E-5
● Exhaust muffler
● Starting motor, 1 x 7.5 kW

CAB:
● Air conditioner
● Ashtray
● Cigarette lighter
● Cup holder
● Electronic maintenance display/monitoring system
● Heated rear window
● Operator seat, reclining, air suspension type with retractable 78 mm 3" width seat belt
● Passenger seat with retractable seatbelt
● Power window (L.H)
● 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

BODY:
● Electronic hoist control system

TIRES:
● 23.5 R25

OTHER:
● Alarm, backup
● Anti-slip material on fenders
● Automatic supplementary steering
● Centralized greasing
● Coolant temperature alarm and light
● Electric circuit breaker, 24V
● Hand rails for platform
● Horn, electric
● Ladders, left and right hand side
● Limited slip differentials in all axles
● Mud guards
● Protective grille for rear window
● Rearview mirrors
● Side marker
● Steering joint locking assembly
● Under view mirrors

HM250-2 OPTIONAL EQUIPMENT

CAB:
● Power window (R.H)
● Radio, AM/FM
● Radio, AM/FM with cassette

BODY:
● Body exhaust heating kit
● Body liner
● Tail gate, wire type, overall width 2998 mm 9'10"
● Upper side extension, 200 mm 8"

LIGHTING SYSTEM:
● Back work lights, left and right side
● Fog lights
● Yellow beacon

TIRES:
● 30/65 R25 (750/65 R25)

OTHER:
● Alternator, 75A/24V
● Automatic Retarder with Acceleration Control (ARAC)
● Dump counter
● Fire extinguisher
● Gas charge tool
● KOMTRAX
● Rear view camera and monitor
● Spare parts for first service
● Tool kit
● Vandalism protection

Source : Komatsu