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Surface mining dozer

D475A-8

  • Horsepower 664 kW @ 2 000 rpm 890 HP @ 2,000 rpm
  • Operating weight 115 300 kg 254,195 lbs.
  • Blade capacity 27.2 - 34.4 m3 35.6 - 44.5 yd3

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

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

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

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

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

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

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

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

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 for D475A-8

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US system Metric
Engine
Model Komatsu SAA12V140E-7
Type 4-cycle, water-cooled, direct injection
Aspiration Turbocharged, air-to-air charge air cooler, cooled EGR
Number of cylinders 12
Bore x stroke 140 x 165 mm 
Piston displacement 30.48 L
Horsepower
SAE J1995 Gross: Forward 697 kW 
Reverse 777 kW
ISO 9249/SAE J1349* Net: Forward 664 kW
Reverse 722 kW
Rated rpm 2 000 rpm
Fan drive type Hydraulic
Lubrication system
Method Gear pump, force lubrication
Filter Full-flow
* Net horsepower at the maximum
speed of radiator cooling fan
Forward/reverse
641/722 kW 
U.S. EPA Tier 4 Final emission certified
Model Komatsu SAA12V140E-7
Type 4-cycle, water-cooled, direct injection
Aspiration Turbocharged, air-to-air charge air cooler, cooled EGR
Number of cylinders 12
Bore x stroke 5.51 x 6.50 in
Piston displacement 1,860 in3
Horsepower
SAE J1995 Gross: Forward 934 HP
Reverse: 1,040 HP
ISO 9249/SAE J1349* Net: Forward 890 HP
Reverse 968 HP
Rated rpm 2,000 rpm
Fan drive type Hydraulic
Lubrication system
Method Gear pump, force lubrication
Filter Full-flow
* Net horsepower at the maximum
speed of radiator cooling fan
Forward/reverse
860/968 HP
U.S. EPA Tier 4 Final emission certified
TORQFLOW transmission

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.

Gear Forward Reverse
1st 3.4 kph 4.4 kph
2nd 6.3 kph 8.4 kph
3rd L 7.4 kph 9.0 kph
3rd  11.6 kph 14.3 kph

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.

Gear Forward Reverse
1st 2.1 mph 2.7 mph
2nd 3.9 mph 5.2 mph
3rd L 4.6 mph 5.6 mph
3rd 7.2 mph 8.9 mph
Final drives

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.

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

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 4.6 m

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 15 ft. 1 in
Undercarriage
Suspension Oscillating equalizer bar and pivot shaft
Track roller frame Cylindrical, high-tensile-strength steel construction
Rollers and idlers Lubricated track rollers
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.
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
Grouser height:
Single grouser 105 mm
Shoe width (standard) 710 mm
Ground contact area* 64 240 cm²
Ground pressure (tractor)** 115.2 kPa 1.18 kg/cm² 
Number of track rollers 8
Number of carrier rollers 2
Extreme service shoes Additional weight Ground contact area* Ground pressure**
810 mm 920 kg 73 290 cm² 118 kPa 1.20 kg/cm²
910 mm 1 830 kg 82 340 cm² 106.1 kPa 1.08 kg/cm²

*Ground contact area calculated by track on ground, center idler to center sprocket
**Ground pressure calculated using ISO 16754

Suspension: Oscillating equalizer bar and pivot shaft

Track roller frame: Cylindrical, high-tensile-strength steel construction

Rollers and idlers: Lubricated track rollers

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.

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
Grouser height:
Single grouser 4.1 in
Shoe width (standard) 28 in
Ground contact area* 9,957 in²
Ground pressure (tractor)** 16.71 psi
Number of track rollers 8
Number of carrier rollers 2
Extreme service shoes Additional weight Ground contact area* Ground pressure**
32 in 2,028 lbs. 11,360 in² 17.1 psi 
36 in 4,034 lbs. 12,763 in² 15.4 psi

*Ground contact area calculated by track on ground, center idler to center sprocket
**Ground pressure calculated using ISO 16754

Coolant and lubricant capacity (refill)
Fuel tank 1 920 L
Coolant 265 L
Engine 120 L
Torque converter, transmission, bevel gear, and steering system 210 L
Final drive (each side) 75 L
Fuel tank 507.2 US gal
Coolant 70 US gal
Engine 31.7 US gal
Torque converter, transmission, bevel gear, and steering system 55.5 US gal
Final drive (each side) 19.8 US gal
Operating Weight
Tractor  88 200 kg
Including rated capacity of lubricant, coolant, full fuel tank, operator, and 710 mm (28 in) shoe, less front and rear attachments.
Operating weight 115 300 kg
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.
Ground pressure* 1.36 kPa 133.4 kgf/cm²

*Ground pressure calculated using ISO 16754

Tractor  194,450 lbs.
Including rated capacity of lubricant, coolant, full fuel tank, operator, and 710 mm (28 in) shoe, less front and rear attachments.
Operating weight 254,195 lbs.
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.
Ground pressure* 19.35 psi

*Ground pressure calculated using ISO 16754

Hydraulic System
Hydraulic control unit
Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.
All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (discharge flow) of 541 L/min (142.9 US gpm) for implement at rated engine rpm.
Relief valve setting For implement 27.5 MPa 280 kgf/cm²
Control valves
Spool control valves for Semi-U tilt dozer and Full-U tilt dozer.
Positions:
blade lift Raise, hold, lower, and float
blade tilt Right, hold, and left
Additional control valve required for variable digging angle multi-shank ripper and giant ripper.
 (Spool control valves for variable digging angle multi-shank ripper and giant ripper.)
Positions:
ripper lift Raise, hold, and lower
ripper tilt Increase, hold, and decrease
Hydraulic cylinders Double-acting, piston
Number of cylinders Bore
Blade lift / 2 180 mm
Blade tilt (single tilt) / 1 250 mm
Blade title (dual tilt) / 2 250 mm
Ripper lift / 2 225 mm
Ripper tilt / 2 225 mm
Hydraulic oil capacity (refill)
Semi-U dozer or U dozer 190 L
Ripper equipment (additional volume)
Giant ripper 130 L
Multi-shank ripper (variable) 130 L
Hydraulic control unit
Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.
All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (discharge flow) of 541 L/min (142.9 US gpm) for implement at rated engine rpm.
Relief valve setting 3,983 psi
Control valves
Spool control valves for Semi-U tilt dozer and Full-U tilt dozer.
Positions:
blade lift Raise, hold, lower, and float
blade tilt Right, hold, and left
Additional control valve required for variable digging angle multi-shank ripper and giant ripper.
 (Spool control valves for variable digging angle multi-shank ripper and giant ripper.)
Positions:
ripper lift Raise, hold, and lower
ripper tilt Increase, hold, and decrease
Hydraulic cylinders Double-acting, piston
Number of cylinders Bore
Blade lift / 2 7.1 in
Blade tilt (single tilt) / 1 9.8 in
Blade title (dual tilt) / 2 9.8 in
Ripper lift / 2 8.9 in
Ripper tilt / 2 8.9 in
Hydraulic oil capacity (refill)
Semi-U dozer or U dozer 50.2 US gal
Ripper equipment (additional volume)
Giant ripper 34.3 US gal
Multi-shank ripper (variable) 34.3 US gal

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

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

  • 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.

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”
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