Looking for a Komatsu website outside of North America?
Mechanical haul truck

HD325-8

  • Gross horsepower 386 kW @ 2 000 rpm 518 HP @ 2,000 rpm
  • Operating weight 70 760 kg 155,999 lbs.
  • Capacity 36.6 mt 40.3 st

Performance matched with comfort

Designed for efficient and highly productive cycle times, the HD325-8 will become your workhorse on the job. Built with MacPherson-strut-type front suspension, this machine delivers a tight turning radius and offers excellent maneuverability and operator comfort.

  • Up to 9% reduction in fuel consumption*
  • Increased horsepower by 3.2%*
  • Enhanced serviceability*
  • Improved operator environment*

    *Compared to HD325-7

Features and benefits

MacPherson-strut-type suspension

A comfortable ride, even on uneven roads. The MacPherson-strut-type independent front suspension allows the front wheels to follow uneven road surfaces smoothly.

Fully hydraulic wet multiple-disc brakes

Give your operator greater confidence at higher downhill speeds with wet multiple-disc brakes. Continuously oil-cooled, multiple-disc brakes function as a highly responsive retarder for added reliability and stable brake performance.

Automatic retard speed control

Let your operator concentrate more on steering by simply setting the downhill travel speed at increments of 0.6 mph to match the optimum speed for slope. Travel speed is automatically lowered if oil temperature increases to a set limit.

K-ATOMiCS transmission

Komatsu Advanced Transmission with Optimum Modulation Control System (K-ATOMiCS) helps avoid unnecessary fuel consumption, reduce material spillage and provide a smoother ride for operators by automatically selecting a gear position depending on grade, speed and acceleration.

Komatsu Traction Control System (KTCS)

KCTS is engineered for optimal traction in soft or wet road conditions with a system that monitors for wheel slippage at the rear axle. If slippage is detected, brakes are applied independently and automatically to each wheel set.

High rigidity frame

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

Robust dump body design

Remarkable rigidity and low maintenance cost with a body design made of high-tensile-strength steel. Stability and lower center of gravity through a standard V-shape body design.

Ergonomically designed cab

Operator comfort is key to your operation’s productivity. Designed for operator comfort, an ergonomically designed cab compartment has a convenient control layout.

Convenient access

Machine maintenance is made more convenient with inclined stairs and handrails that provide easy access to the cab and service deck.

Integrated payload meter

Manage the hauling cycle payloads and analyze the production volume and working conditions for specific time periods. Loaded weight is shown on the payload display and external display lamps in real time.

Ground-accessible battery compartment

Facilitate daily checks and battery replacement with a battery compartment located at ground level for convenient access.

Centralized greasing points

Easy accessibility with ground-level greasing points centralized at three locations.

Specifications for HD325-8

Close all Expand all
US system Metric
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 x 165 mm
Piston displacement 15.24 L
Horsepower:
SAE J1995 386 kW
ISO 9249 /SAE J1349 383 kW
Rated rpm 2 000 rpm
Fan drive type Hydraulic
Maximum torque 221 kg-m
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

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 5.5 x 6.5 in
Piston displacement 930 in³
Horsepower:
SAE J1995 518 HP
ISO 9249 /SAE J1349 514 HP
Rated rpm 2,000 rpm
Fan drive type Hydraulic
Maximum torque 1,600 lbs.-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 kph
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 42.3 mph
Axles
Rear axle Full-floating
Final drive Planetary gear
Ratios:
Differential 3.125
Planetary 4.737
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
Rear axle oscillation:
Oil stopper 6.8°
Mechanical stopper 8.1°

Independent, hydropneumatic suspension cylinder with fixed throttle to dampen vibration

Effective cylinder stroke (front suspension) 9.8 in
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
Maximum steering angle 43°
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 23 ft. 7 in
Maximum steering angle 43°
Cab

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

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

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 cm
Rear 50 847 cm

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 150 in2
Rear 7,881 in2
Main Frame

Type

Box-sectioned structure

Type

Box-sectioned structure

Body
Capacity:  
Struck 16.9m3
Heaped (2:1 ,SAE) 24 m3
Payload, maximum 36.5 metric tons
Material (high-tensile-strength steel) 130 kg/mm2
Structure V-shape body
Material thickness:  
Bottom 16 mm
Front 12 mm
Sides 9 mm
Target area (inside length x width) 5 515 x 3 380 mm
Dumping angle 48°
Height at full dump 8 030 mm
Heating Exhaust heating
Capacity:  
Struck 22.1 yd3
Heaped (2:1 ,SAE) 31.4 yd3
Payload, maximum 40.3 US tons
Material (high-tensile-strength steel) 184,860 psi
Structure V-shape body
Material thickness:  
Bottom 0.63 in
Front 0.47 in
Sides 0.35 in
Target area (inside length x width) 18 ft. 1 in x 11 ft. 1 in
Dumping angle 48°
Height at full dump 26 ft. 4 in
Heating Exhaust heating
Hydraulic System
Hoist cylinder Twin, 2-stage telescopic type
Relief pressure 20.6 MPa 210 kg/cm2
Hoist time 10 s
Hoist cylinder Twin, 2-stage telescopic type
Relief pressure 2,990 psi
Hoist time 10 s
Weight (approximate)
Empty weight 34 180 kg
Max. gross vehicle weight:  
Standard tire 70 760 kg
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%
Empty weight 75,354 lbs.
Max. gross vehicle weight:  
Standard tire 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 tire: 18.00 R33

Standard tire: 18.00 R33

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

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): 386 kW / 2000 RPM; Net HP (ISO
  • 9249/SAE J1349): 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 75 mm wide lap belt and 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 (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

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 / 2000 RPM; Net HP (ISO
  • 9249/SAE J1349): 514 HP / 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" wide lap belt and 2" 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" 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

BODY:

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

TIRES (18.00 R33):

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

BODY:

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

TIRES (18.00 R33):

  • Michelin XHAUL
  • Michelin X-Quarry
  • Michelin XTRACTION
  • Bridgestone VELS
Support you can count on

Technology that works as hard as you do

Dozer_D37PX_Literature linkKOMTRAX_Hi-Res_Cover FIN 1_v2.psd
Komtrax for construction equipment is Komatsu’s state of the art remote monitoring system, helping you keep track of where your machines are and how much they are working. The system seamlessly gathers important data that can help you coach operators to improve efficiencies and productivity.

Find what works for you