• 155,999 lbs Max Gross Vehicle Weight
  • 518 @2000 rpm Gross HP
  • 40.3 U.S. tons Capacity

HD325-8

The HD325-8 is a 40.3 ton capacity workhorse. Very maneuverable, the MacPherson-strut-type front suspension gives the HD325-8 the tightest turning radius in its class. With two working modes the operator can most effectively take advantage of the fully automatic seven-speed transmission with lock-up feature. A hydropneumatic suspension gives the operator a comfortable ride while maintaining more material in the bed for more production. Komatsu Traction Control (KTCS) is standard for optimum traction in all ground conditions.

HD325-8 Walkaround  >

Features

Small Turning Radius

The McPherson strut type front suspension has a special A-arm between each wheel and the main frame. The wider space created between the front wheels and the main frame increases the turning angle of the wheels. The larger turning angle correlates to a smaller turning radius.

Minimum Turning Radius: 23'7" 7.2 m

Fully Hydraulic

Rear wet multiple-disc brakes ensure highly reliable and stable brake performance. The large-capacity, continuously-oilcooled, multiple-disc brakes also function as a highly responsive retarder, which gives the operator greater confidence at higher downhill speeds.

Retarder Absorbing Capacity: 924 HP 689 kW

Komatsu Advanced Transmission with Optimum. Modulation Control System (K-ATOMiCS) with Skip Shift Function

Fully automatic control selects the optimum gear, according to vehicle speed and the engine speed. The shift point automatically changes, depending on the acceleration of the vehicle. This avoids unnecessary fuel consumption.

Komatsu Traction Control System (KTCS)

New KTCS ensures optimum traction in soft or wet road conditions. The system monitors for wheel slippage at the rear axle, and an acceleration sensor allows determination of a high speed turn versus slippage.

If slippage is detected, the brakes are applied independently to each wheel set for optimum traction. This function occurs automatically without operator input and steering performance is not compromised, as with a differential lock system.

Ergonomically Designed Cab

The ergonomically designed operator's compartment provides the operator a convenient control layout and comfortable environment for more confident operation and greater productivity.

Air Suspension Seat

The heated and ventilated, air suspension, fabric-covered seat is adjustable to the operator’s weight, and is provided as standard. The air suspension seat dampens vibrations transmitted from the machine to reduce operator fatigue. A three-point operator seat belt is standard.

Rearview Monitor System

The operator can view behind the vehicle on the full color monitor, located on the right side of the dashboard. This monitor can be always ON, or only when the shift lever is in the reverse position. Visual distance guidelines can be added for the operator's convenience.

Convenient Access

Inclined stairs with handrails provide easy access to the cab and service deck.

High Rigidty Frame

Cast-steel components are used in critical areas of the main frame where loads and shocks are most concentrated.

Integrated Payload Meter

PLM is a tool to manage the hauling cycle payloads and to analyze the production volume and working conditions of the dump truck for specific time periods. Loaded weight is shown on the payload display (on the LCD unit), and by the external display lamps in real time, while loading.

Ground Accessible Battery Compartment

The battery compartment is located at ground level to facilitate daily checks and battery replacement.

Specification

Engine

Model Komatsu SAA6D140E-7*
Type Water-cooled, 4-cycle
Aspiration Variable geometry, turbo-charged, air-to-air
after-cooled, cooled Exhaust Gas Recirculation (EGR)
Number of cylinders 6
Bore x stroke 140 mm x 165 m 5.5" x 6.5"
Piston displacement 15.24 ltr 930 in³
Horsepower:
SAE J1995 386 kW 518 HP
ISO 9249 /SAE J1349 383 kW 514HP
Rated rpm 2,000 rpm
Fan drive type Hydraulic
Maximum torque 221 kg•m 1,600 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, plus dust indicator
*EPA Tier 4 Final emissions certified

Transmission

Torque converter
Three-elements, one-stage, two-phase
Transmission
Full-automatic, planetary type
Speed range
Seven speeds forward and one 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
Shift control
Electronic shift control with automatic clutch modulation in all gears
Maximum travel speed 68 km/h
42.3 mph

Axles

Rear axle Full-floating
Final drive Planetary gear
Ratios:
Differential 3.125
Planetary 4.737

Suspension System

Independent, hydropneumatic suspension cylinder with fixed throttle to dampen vibration

 

Effective cylinder stroke (front suspension) 250 mm 9.8"
Rear axle oscillation:
Oil stopper 6.8°
Mechanical stopper 8.1°

Steering System

Type Fully hydraulic power steering with two double-acting cylinder
Supplementary steering Automatic/manual control (meets ISO 5010, SAE J1511 and SAE J53)
Minimum turning radius 7.2 m 23'7''
Maximum steering angle 43°

Cab

Dimensions comply with ISO 3471 and SAE J1040-1988c ROPS (Roll-Over Protective Structure) standards.

Main Frame

Type Box-sectioned structure

Brakes

Brakes meet ISO 3450 and SAE 1473 standards

Service brakes:
Front Dry type, single disc type full hydraulic
Rear Wet type, multiple disc type, full hydraulic
Parking brake Dry type, single disc type, spring operated, hydraulic releasing type
Retarder Oil-cooled, multiple-disc type
Secondary brake Manual pedal operation
When hydraulic pressure drops below the rated level, parking brake is automatically actuated
Brake surface:
Front 968 cm2 150 in 2
Rear 50847 cm2 7,881 in 2

Body

Capacity:
Struck 16.9m3 22.1 yd3
Heaped (2:1 ,SAE) 24 m3 31.4 yd3
Payload, maximum 36.5 metric tons 40.3 U.S. tons
Material (high-tensile-strength steel) 130 kg/mm2 184,860 psi
Structure V-shape body
Material thickness:
Bottom 16 mm 0.63"
Front 12 mm 0.47"
Sides 9 mm 0.35"
Target area (inside length x width) 5515 mm x 3380 mm 18'1" x 11'1"
Dumping angle 48°
Height at full dump 8030 mm 26'4"
Heating Exhaust heating

Hydraulic System

Hoist cylinder Twin, 2-stage telescopic type
Relief pressure 20.6 MPa 210 kg/cm2 2,990 psi
Hoist time 10 sec

Weight

Empty weight 34180 kg
75,354 lbs
Max. gross vehicle weight:
Standard tire 70760 kg 155,999 lbs
Not to exceed max. gross vehicle weight, including options, fuel
Weight distribution:
Empty: Front axle 56.5%
Rear axle 43.5%
Loaded: Front axle 33.7%
Rear axle 66.3%

Tires

Standard Tires 18.00 R33

Service Refill Capacities

Fuel tank 456 ltr. 120.5 U.S. Gal
DEF tank 34.7 ltr 9.2 U.S. gal
Engine oil 50ltr 13.2 U.S. Gal
Torque converter, transmission and retarder cooling 112ltr 29.6 U.S. Gal
Differential 45 ltr 11.9 U.S. Gal
Final drive (left and right) 30 ltr 7.9 U.S.
Hydraulic system 120 ltr 31.7 U.S. gal
Suspension (total) 44.2 ltr 11.7 U.S. gal

Standard

ENGINE:

  • Air cleaner, dry type, two stage
  • Automatic Idling Setting System (AISS)
  • Auto Idle Shutdown
  • Electric priming fuel pump
  • Engine secondary stop switch
  • Engine, Komatsu SAA6D140E-7, six cylinder, turbocharged, air/air aftercooled, EGR cooled, diesel; Gross HP (SAE J1995): 518 HP (386 kW) / 2000 RPM; Net HP (ISO
  • 9249/SAE J1349): 514 HP (383 kW) / 2000 RPM
  • Fan, hydraulically driven, reversible
  • Komatsu Diesel Particulate Filter (KDPF)
  • Starting aid, intake manifold pre-heater
  • Variable geometry turbocharger

ELECTRICAL SYSTEM:

  • Alternator, 140 ampere , 24 volt
  • Back-up alarm
  • Batteries, 2 x 12 volt 160 Ah, 910 CCA
  • Battery disconnect switch
  • Horn, electric
  • Lights
  • - Back-up light, rear
  • - Engine compartment light
  • - Head lights, halogen (high and low beam)
  • - Side working lights, LH and RH
  • - Stop and tail lights (LED)
  • - Turn signal, (two front, two rear)(LED) with hazard switch
  • Starting motors, 11.0 kW direct electric 24V

POWER TRAIN AND CONTROLS:

  • Seven-speed transmission, fully automatic with K-ATOMiCS
  • Komatsu Traction Control System (KTCS)
  • Front brake, dry type, single disc type, full hydraulic
  • Parking brake, dry type, single disc type, spring operated, hydraulic releasing type
  • Rear brake, Wet type, multiple disc type, full hydraulic
  • Skip shift function

OPERATOR ENVIRONMENT:

  • Cab, with built in ROPS/FOPS
  • - 12 Volt outlet (qty two)
  • - Automatic climate control system with cab pressurization
  • - Auxiliary steering system
  • - Beverage holder (qty two)
  • - Body hoist control, electric
  • - Cigarette lighter and ashtray
  • - Dome light and reading light
  • - Door, LH and RH
  • - Lunch box tray and storage trays
  • - Machine monitor with seven-inch color LCD display
  • - Operator seat, air suspension type, heated, ventilated, with three-point retractable seat belt (3" 75 mm wide lap belt and 2" 50 mm wide, high visibility shoulder belt)
  • - Power windows, LH and RH
  • - Radio, AM/FM with aux terminal
  • - Rearview mirror, outside cab mount, heated (LH & RH)
  • - Rearview monitoring system with dedicated monitor
  • - Steering wheel, tilt and telescopic
  • - Sun visor (qty two)
  • - Tinted glass (front, laminated glass)
  • - Trainer seat, folding, with two-point retractable seat belt (3" 75 mm wide)
  • - Wiper/washer, front, with intermittent setting

GUARD AND COVER GROUP:

  • Catwalk with handrails
  • Deck rail
  • Driveline guards, front & rear
  • Engine underguard
  • Exhaust thermal guard
  • Front handrail, over radiator
  • Mudguards
  • Transmission underguard

MONITORING SYSTEM, ELECTRONIC DISPLAY ITEMS:

  • Instrument panel gauges
  • - Coolant temperature
  • - Hour meter (Service meter)
  • - Retarder oil temperature
  • - Speedometer with odometer
  • - Tachometer
  • - Torque converter oil temperature
  • Warning lights
  • - DEF level
  • - Engine coolant temperature
  • - Engine coolant level
  • - Engine oil pressure
  • - Parking brake
  • - Retarder oil temperature
  • - Torque converter oil temperature

OTHER:

  • Angled front stairs with hand rails
  • Automatic retarder speed control (ARSC)
  • Centralized lube block
  • Dump counter
  • Ecology guidance and ecology gauge
  • Fast-fill coupler for fuel tank
  • Filler cap and cover locks
  • Front brake cut-off system
  • Hydropneumatic suspension (front & rear)
  • Less body (must select body)
  • Mirror, rearview, underview
  • PM Service connectors
  • Rock ejector bars
  • KOMTRAX® telematics package with integrated payload meter (PLM)
  • Wheel chocks with storage brackets

Optional

BODY:

  • Alternative exhaust configuration (RH side discharge)
  • Body
  • Body liner

TIRES (18.00 R33):

  • Michelin XHAUL
  • Michelin X-Quarry
  • Michelin XTRACTION
  • Bridgestone VELS