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Dozers

D475A-8

Surface mining dozers

  • Horsepower (HP) 890 HP @ 2,000 rpm
  • Horsepower (kW) 664 kW @ 2 000 rpm
  • Operating weight (kg) 115 300
  • Operating weight (lbs) 254,195
  • Blade capacity (m^3) 27.2 - 34.4
  • Blade capacity (yd^3) 35.6 - 44.5

Purchase options

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Strength and performance

When you need a versatile mining dozer that can go from ripping solid rock to cleaning up around the dragline, the Komatsu D475A-8 is a solid choice. Using an automatic lockup torque converter, the D475A-8 combined power and speed is designed for high production with minimal fuel consumption.

  • Up to 10% productivity increase over previous models
  • Over 11% more engine power in the reverse direction versus the forward direction
  • 10% reduction in fuel consumption with automatic transmission with lockup torque converter compared to operation in manual gearshift mode

Features and benefits

Lockup torque converter

Lockup torque converter

Engineered for exceptional production. Komatsu’s lockup torque converter produces a more efficient transfer of power to the driveline, designed to help decrease cycle times and increase production.

Low undercarriage design

Low undercarriage design

Equipped with a low drive undercarriage designed to help reduce wear and tear on your machine while still delivering comfort and stability. Minimal moving parts to help maintain high levels of traction and production when dozing and ripping.

Structural improvements

Structural improvements

The D475A-8 features a more reliable mainframe with twice the design life over previous models, designed to reduce maintenance costs and machine downtime.

Blade auto-pitch

Blade auto-pitch

Designed to increase dozing efficiency while reducing operator efforts with blade auto-pitch mode.

Ripper auto-return

Ripper auto-return

The new, ergonomic ripper control lever incorporates an auto-return function designed for less fatiguing operation, automatically raising the ripper after momentarily actuating the control lever while the machine is in reverse.

Track shoe slip control

Track shoe slip control

Track shoe slip control automatically controls engine speed and minimizes slip during ripping operation, so your operator doesn’t have to.

Operator comfort

Operator comfort

Designed to maximize operator comfort and productivity with thoughtful design enhancements like an upgraded cab suspension and palm control joysticks.

Single blade linkage

Single blade linkage

Significantly reduced blade side sway with an all-new blade support structure. The new support structure has fewer maintenance points with enhanced visibility over previous models.

Maintenance features

Maintenance features

The D475A-8 is engineered to minimize planned downtime and make maintenance efficient with features such as centralized greasing points, ground-level fill/evac service center and battery and starter isolators with lockout tagout functionality.


Specifications

Metric Imperial (US)
Expand all

  • Ground pressure (kPa): 133.4
  • Ground pressure (kg/cm^2): 1.36
  • Ground pressure (psi): 19.35
  • Operator weight (approximate): Includes dual tilt U dozer, giant variable ripper, cab, ROPS (ISO 3471), operator, standard equipment, rated lubricant volumes, coolant, full fuel tank and 810 mm (32 in) track shoes.
  • Operating weight

    • Operating weight (kg): 115 300
    • Operating weight (lbs): 254,195
  • Tractor weight

    • Tractor weight (kg): 88 200
    • Tractor weight (lbs): 194,450
    • Tractor weight inclusions: Including rated capacity of lubricant, coolant, full fuel tank, operator, and 710 mm (28 in) shoe, less front and rear attachments.

  • Suspension: Oscillating equalizer bar and pivot shaft
  • Track roller frame: Cylindrical, high-tensile-strength steel construction
  • Rollers and idlers: Lubricated track rollers
  • Type of shoes (standard): Single grouser
  • Number of track rollers (each side): 8
  • Extreme service track shoes: Lubricated tracks. Unique seals prevent entry of foreign abrasives into pin to bushing clearances to provide extended service life. Track tension is easily adjusted with grease gun.
  • Number of shoes (each side): 41
  • Number of carrier rollers (each side): 2
  • Komatsu Bogie (K-Bogie) undercarriage: Lubricated track rollers are resiliently mounted to the track frame with a bogie suspension system whose oscillating motion is cushioned by rubber pads.
  • Grouser height (in): 4.1
  • Grouser height (mm): 105
  • Shoe width (standard)(mm): 710
  • Shoe width (standard)(in): 28
  • Ground contact area (ft2): 69.1 - 88.6
  • Ground contact area (cm^2): 64 240 - 82 340
  • Ground pressure (with standard shoe)(ISO 16754)(psi): 15.4 - 17.1
  • Ground pressure (with standard shoe)(ISO 16754)(kg/cm^2): 1.08 - 1.20
  • Ground pressure (with standard shoe)(ISO 16754)(kpa): 106.1 - 118

  • Fuel tank (US gal): 507.2
  • Fuel tank (L): 1 920
  • Coolant (L): 265
  • Coolant (US gal): 70
  • Engine oil (L): 120
  • Engine oil (US gal): 31.7
  • Torque converter, transmission, bevel gear, and steering system (L): 210
  • Torque converter, transmission, bevel gear, and steering system (US gal): 55.5
  • Final drive (L): 75
  • Final drive (US gal): 19.8

  • Transmission features: Komatsu TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase torque converter with lockup clutch and a planetary gear, multiple-disc clutch transmission which is hydraulically actuated and force-lubricated for optimum heat dissipation. Gearshift lock lever and neutral safety switch help prevent accidental starts.
  • Reverse

    • 1st torqflow reverse (kph): 4.4
    • 1st torqflow reverse (mph): 2.7
    • 2nd torqflow reverse (kph): 8.4
    • 2nd torqflow reverse (mph): 5.2
    • 3rd torqflow reverse (mph): 8.9
    • 3rd torqflow reverse (kph): 14.3
    • 3rdL torqflow reverse (kph): 9.0
    • 3rdL torqflow reverse (mph): 5.6
  • Forward

    • 1st torqflow forward (kph): 3.4
    • 1st torqflow forward (mph): 2.1
    • 2nd torqflow forward (mph): 3.9
    • 2nd torqflow forward (kph): 6.3
    • 3rd torqflow forward (mph): 7.2
    • 3rd torqflow forward (kph): 11.6
    • 3rdL torqflow forward (kph): 7.4
    • 3rdL torqflow forward (mph): 4.6

  • Hydraulic system features: Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.
  • Hydraulic control unit (U.S. gal/min): All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (discharge flow) of 142.9 US gpm for implement at rated engine rpm.
  • Hydraulic control unit (ltr/min): All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (discharge flow) of 541 L/min for implement at rated engine rpm.
  • Relief valve setting (psi): 3,983
  • Relief valve setting (kg/cm^2): 280
  • Relief valve setting (MPa): 27.5
  • Number of cylinders

    • Blade tilt /1 (mm): 250
    • Blade tilt /1 (in): 9.8
    • Blade lift / 2 (in): 7.1
    • Blade lift / 2 (mm): 180
    • Blade tilt / 2 (mm): 250
    • Blade tilt / 2 (in): 9.8
    • Ripper lift (in): 8.9
    • Ripper lift (mm): 225
    • Ripper tilt (mm): 225
    • Ripper tilt (in): 8.9
  • Hydraulic oil capacity (refill)

    • Semi-U dozer or U dozer (L): 190
    • Semi-U dozer or U dozer (US gal): 50.2
    • Positions

      • Blade lift: Raise, hold, lower, and float
      • Blade tilt: Right, hold, and left
      • Ripper lift: Raise, hold, and lower
      • Ripper tilt: Increase, hold, and decrease
  • Ripper equipment (additional volume)

    • Multi-shank ripper (variable)(US gal): 34.3
    • Multi-shank ripper (variable)(L): 130
    • Giant ripper (L): 130
    • Giant ripper (US gal): 34.3
  • Hydraulic cylinders

    • Hydraulic cylinders: Double-acting, piston type

  • Engine Model: Komatsu SAA12V140E-7
  • Dozers type: 4-cycle, water-cooled, direct injection
  • Aspiration: Turbocharged, air-to-air charge air cooler, cooled EGR
  • Number of cylinders: 12
  • Bore x stroke (mm): 140 x 165
  • Bore x stroke (in): 5.51 x 6.50
  • Piston displacement (in^3): 1,860
  • Piston displacement (L): 30.48
  • Footnote: *EPA Tier 4 Final emissions certified
  • Lubrication system

    • Filter: Full-flow
    • Method: Gear pump, force lubrication
  • Horsepower

    • SAEJ1995 - Gross (HP): 934
    • SAEJ1995 - Gross (kW): 697
    • SAEJ1995 - gross - reverse (kW): 777
    • SAEJ1995 - gross - reverse (HP): 1,040
    • ISO 9249 / SAE J1349 - Net (HP): 890
    • ISO 9249 / SAE J1349 - Gross - Reverse (kW): 772
    • ISO 9249 / SAE J1349 - Net 0 Reverse (HP): 968
    • ISO 9249 / SAE J1349 - Gross (kW): 664
    • Rated RPM: 2,000
    • Fan drive type: Hydraulic
    • Net horsepower at the maximum speed of radiator cooling fan - forward (kW): 641
    • Net horsepower at the maximum speed of radiator cooling fan - forward (HP): 860
    • Net horsepower at the maximum speed of radiator cooling fan - reverse (HP): 968
    • Net horsepower at the maximum speed of radiator cooling fan - reverse (kW): 722

  • Final drive features: Double-reduction final drive of spur and planetary gear sets to increase tractive effort and reduce gear tooth stresses for long final drive life. Segmented sprocket teeth are bolt-on for easy replacement.

  • Steering system features: Palm Command Control System (PCCS), joystick controlled, wet multiple-disc steering clutches are spring-loaded and hydraulically released. Wet multiple-disc, pedal/lever controlled steering brakes are spring-actuated hydraulically released and require no adjustment. Steering clutches and brakes are interconnected for easy, responsive steering.
  • Minimum turning radius (in): 181
  • Minimum turning radius (m): 4.6
Metric Imperial (US)

Operator environment and equipment

  • Air conditioner and heater with automatic climate control and defroster
  • Back-up alarm
  • Decelerator pedal
  • Double wiper for Cab door
  • Horn, warning
  • LED lighting package
    • Access lamps (4)
    • Additional Cab mount (4)
    • Front fender mount (2)
    • High mount on hood (2)
    • Rear fender mount (2)
    • Ripper point light
  • Lunch box holder
  • Mirror, rearview
  • Palm Command Control Steering (PCCS) system
  • Provisions for power ladder installation
  • Radio, AM/FM, AUX, bluetooth
  • Rearview monitoring system
  • ROPS (meets ISO 3471 standards)
    • Weight: 1,634 lbs.
    • Width: 6‘11“
    • Height: 6‘3“ (compartment floor to ceiling)
  • Seat
    Air suspension, fabric, low back rest, head rest, heated and ventilated
  • Seat belt, 3” retractable
  • Uninterupted power source for 3rd party system

Powertrain

  • Auto/manual gearshift (3F/3R) TORQFLOW transmission
    Torque converter with lock-up clutch
  • Alternator, 140 Amps, 24V
  • Batteries, large capacity, 4 x 12 V, 160 Ah
  • Circuit breaker panel w/ push button resets
  • Dry-type air cleaner with dust evacuator and dust indicator
  • Electrical Engine oil and coolant heaters
  • Engine intake precleaner
  • Engine prelubrication system
  • Final drive scraper, wear guard
  • Hydraulically driven radiator fan, swing out, reversible
  • Perforated side covers
  • Radiator, fin and tube type, copper core
  • Starting motors, 15 kW. (2 x 7.5 kW.), 24 V
  • Steering, wet clutch and brake

Undercarriage

  • Extreme service shoes with cold link assemblies
    • 28” shoe width
  • Hydraulic track adjusters
  • Idler spring tensioner, additional preload
  • Labryinth-type track rollers
  • Segmented sprocket segments
  • Track roller guards

Dozer equipment

  • Hydraulics and Cab controls for dual-tilt dozer equipment

Rear attachment

  • Hydraulics and Cab controls for giant variable ripper

Service and maintenance

  • Anchor points for service lanyards
  • Canister-type, remote breathers
  • Centralized greasing (blade cylinder yoke and Ripper)
  • Concentrated live oil sampling ports
  • Engine emergency stop system
  • Engine room light
  • Electrical dust indicator
  • Electrical Engine oil level sensor
  • Electrical hydraulic oil level sensor
  • Fast fill fuel system
  • Hinged underguards with front pull hoook
  • Isolators, battery and starter
  • Jump start recepticle
  • Service fill and evacuation center, ground-level
    Hyd. oil, eng. oil, T/M oil, and coolant
  • Platform with hand rails and toe boards
  • PM service connectors
  • Radiator site gauge
  • Vandalisim protection kit (cover locks)

Technology

  • Auto-idle stop system
  • Auto-pitch blade control
  • Autor-ripper return
  • KOMTRAX PLUS® WITH Iridium + WIFI
  • Track shoe slip control

Special arrangements

  • Cold area arrangement (-30 C˚- +40 C˚)
  • High altitude arrangement
  • Mining specification
  • MSHA regulation arrangement (dust)
  • OSHA (USA) regulation arrangement
  • Sandy and dusty area arrangement

Operator environment and equipment

  • Air conditioner and heater with automatic climate control and defroster
  • Back-up alarm
  • Decelerator pedal
  • Double wiper for Cab door
  • Horn, warning
  • LED lighting package
    • Access lamps (4)
    • Additional Cab mount (4)
    • Front fender mount (2)
    • High mount on hood (2)
    • Rear fender mount (2)
    • Ripper point light
  • Lunch box holder
  • Mirror, rearview
  • Palm Command Control Steering (PCCS) system
  • Provisions for power ladder installation
  • Radio, AM/FM, AUX, bluetooth
  • Rearview monitoring system
  • ROPS (meets ISO 3471 standards)
    • Weight: 741 kg.
    • Width: 2,098 mm.
    • Height: 1,910 mm (compartment floor to ceiling)
  • Seat
    Air suspension, fabric, low back rest, head rest, heated and ventilated
  • Seat belt, 3” retractable
  • Uninterupted power source for 3rd party system

Powertrain

  • Auto/manual gearshift (3F/3R) TORQFLOW transmission
    Torque converter with lock-up clutch
  • Alternator, 140 Amps, 24V
  • Batteries, large capacity, 4 x 12 V, 160 Ah
  • Circuit breaker panel w/ push button resets
  • Dry-type air cleaner with dust evacuator and dust indicator
  • Electrical Engine oil and coolant heaters
  • Engine intake precleaner
  • Engine prelubrication system
  • Final drive scraper, wear guard
  • Hydraulically driven radiator fan, swing out, reversible
  • Perforated side covers
  • Radiator, fin and tube type, copper core
  • Starting motors, 15 kW. (2 x 7.5 kW.), 24 V
  • Steering, wet clutch and brake

Undercarriage

  • Extreme service shoes with cold link assemblies
    • 710 mm. shoe width
  • Hydraulic track adjusters
  • Idler spring tensioner, additional preload
  • Labryinth-type track rollers
  • Segmented sprocket segments
  • Track roller guards

Dozer equipment

  • Hydraulics and Cab controls for dual-tilt dozer equipment

Rear attachment

  • Hydraulics and Cab controls for giant variable ripper

Service and maintenance

  • Anchor points for service lanyards
  • Canister-type, remote breathers
  • Centralized greasing (blade cylinder yoke and Ripper)
  • Concentrated live oil sampling ports
  • Engine emergency stop system
  • Engine room light
  • Electrical dust indicator
  • Electrical Engine oil level sensor
  • Electrical hydraulic oil level sensor
  • Fast fill fuel system
  • Hinged underguards with front pull hoook
  • Isolators, battery and starter
  • Jump start recepticle
  • Service fill and evacuation center, ground-level
    Hyd. oil, eng. oil, T/M oil, and coolant
  • Platform with hand rails and toe boards
  • PM service connectors
  • Radiator site gauge
  • Vandalisim protection kit (cover locks)

Technology

  • Auto-idle stop system
  • Auto-pitch blade control
  • Autor-ripper return
  • KOMTRAX PLUS® WITH Iridium + WIFI
  • Track shoe slip control

Special arrangements

  • Cold area arrangement (-30 C˚- +40 C˚)
  • High altitude arrangement
  • Mining specification
  • MSHA regulation arrangement (dust)
  • OSHA (USA) regulation arrangement
  • Sandy and dusty area arrangement
Metric Imperial (US)

Operator environment and equipment

  • Finger Command Control (FCCS) steering system
  • Power ladder

Undercarriage

  • Extreme service shoes with cold link assemblies
    • 32" shoe width
    • 36" shoe width

Dozer equipment

  • Blade Semi-U, stengthened dual-tilt, 35.6 yd³
  • Blade Full-U, strengthened dual-tilt, 45.0 yd³
  • Straight fame assembly, dual-tilit, less blade

Rear attachment

  • Counterweight with hitch - 13,395 lbs.
  • Counterweight, additional with hitch - 14,509 lbs.
  • Ripper assembly, giant variable, long protector
    • Variable, single shank ripper ideal for tough ripping applications. Ripping angle is variable. Ripping depth is adjustable with a hydraullically controlled pin-puller
    • Weight: 15,895 lbs.
    • Beam length: 4'11"
    • Maximum lift above ground: 4'0"
    • Maximum digging depth: 6'1"
    Ripper Assembly, multi-shank
    • Three shank assembly with hydrualically controlled lift and tilt functionality.
    • Weight: 21,430 lbs.
    • Beam length: 10'1"
    • Maximum lift above ground: 4'0"
    • Maximum digging depth: 4'1"

Operator environment and equipment

  • Finger Command Control (FCCS) steering system
  • Power ladder

Undercarriage

  • Extreme service shoes with cold link assemblies
    • 810 mm. shoe width
    • 910 mm. shoe width

Dozer equipment

  • Blade Semi-U, stengthened dual-tilt, 27.2 m³
  • Blade Full-U, strengthened dual-tilt, 34.4 m³
  • Straight fame assembly, dual-tilit, less blade

Rear attachment

  • Counterweight with hitch - 6 076 kg.
  • Counterweight, additional with hitch - 6 581 kg.
  • Ripper assembly, giant variable, long protector
    • Variable, single shank ripper ideal for tough ripping applications. Ripping angle is variable. Ripping depth is adjustable with a hydraullically controlled pin-puller
    • Weight: 7 210 kg.
    • Beam length: 1 500 mm.
    • Maximum lift above ground: 1 210 mm.
    • Maximum digging depth: 1 845 mm.
  • Ripper Assembly, multi-shank
    • Three shank assembly with hydrualically controlled lift and tilt functionality.
    • Weight: 9 720 kg.
    • Beam length: 3 085 mm.
    • Maximum lift above ground: 1 210 mm.
    • Maximum digging depth: 1 240 mm.

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