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Surface mining dozer

D375A-8

  • Horsepower 455 kW @ 1 800 rpm 609 HP @ 1,800 rpm
  • Operating weight 74 090 kg 163,340 lbs.
  • Blade capacity 18.5 - 22.0 m3 24.2 - 28.8 yd3

Strength and performance

Whether you are looking to keep blasting, loading and dump areas clean, or construct and maintain haul roads, dozers have a direct impact on your fleet’s productivity. With new mainframes featuring twice the design life over previous models, Komatsu mining dozers are engineered to be powerful and durable.

  • Up to 18% productivity increase over previous models
  • Over 20% more engine power in the reverse direction versus 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 D375A-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 D375A-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 D375A-8

Close all Expand all
US system Metric
Coolant and Lubricant Capacity refill
Fuel tank 1 200 L
Coolant 145 L
Engine 86 L
Torque converter, transmission,
bevel gear, and steering system
150 L
Final drive (Each side) 65 L
Fuel tank 317.0 US gal
Coolant 41.5 US gal
Engine 21.1 US gal
Torque converter, transmission,
bevel gear, and steering system
39.6 US gal
Final drive (Each side) 16.1 US gal
Engine
Model Komatsu SAA6D170E-7
Type 4-cycle, water-cooled, direct injection
Aspiration Turbocharged, air-to-air charge air cooler, cooled EGR
Number of cylinders 6
Bore x stroke 170 x 170 mm
Piston displacement 23.15 L
Governor Mid-range, electronic
Horsepower:
SAE J1995 - Gross
Forward 474 kW
Reverse 578 kW
ISO 9249 / SAE J1349* - Net
Forward 455 kW
Reverse 558 kW
Rated rpm 1 800 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 432 kW
Reverse 536 kW

U.S. EPA Tier 4 Final emission certified.

Model Komatsu SAA6D170E-7
Type 4-cycle, water-cooled, direct injection
Aspiration Turbocharged, air-to-air charge air cooler, cooled EGR
Number of cylinders 6
Bore x stroke 6.69 x 6.69 in
Piston displacement 1,413 in³
Governor Mid-range, electronic
Horsepower:
SAE J1995 - Gross
Forward 636 HP
Reverse 775 HP
ISO 9249 / SAE J1349* - Net
Forward 609 HP
Reverse 748 HP
Rated rpm 1,800 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 580 HP
Reverse 719 HP

U.S. EPA Tier 4 Final emission certified.

Final Drive

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.

Hydraulic System

Hydraulic control unit:
Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control unit:
All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (Discharge flow) of 96.7 US gpm 366 L/min for implement at rated engine rpm.

Relief valve setting (for implement) 29.8 MPa / 304 kg/cm²
Control valves:
Spool control valve for Semi-U tilt dozer and U tilt dozer.
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.
Ripper lift Raise, hold, and lower
Ripper tilt Increase, hold, and decrease
Hydraulic cylinders:
Double-acting, piston
Number of cylinders: Bore:
Blade lift 2 140 mm 
Blade Tilt (Single tilt) 1 200 mm 
Blade Tilt (Dual tilt) 2 200 mm 
Ripper lift 2 200 mm 
Ripper tilt 2 180 mm 
Hydraulic oil capacity (Refill):
Semi-U dozer or U dozer 130 L
Ripper equipment (Additional volume):
Giant ripper 45 L
Multi-shank ripper (variable) 45 L

Hydraulic control unit:
Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control unit:
All spool control valves externally mounted beside the hydraulic tank. Variable piston pump with capacity (Discharge flow) of 96.7 US gal/min 366 L/min for implement at rated engine rpm.

Relief valve setting (for implement) 4,322 psi
Control valves:
Spool control valve for Semi-U tilt dozer and U tilt dozer.
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.
Ripper lift Raise, hold, and lower
Ripper tilt Increase, hold, and decrease
Hydraulic cylinders:
Double-acting, piston
Number of cylinders: Bore:
Blade lift 2 5.5 in
Blade Tilt (Single tilt) 1 7.9 in
Blade Tilt (Dual tilt) 2 7.9 in
Ripper lift 2 7.9 in
Ripper tilt 2 7.1 in
Hydraulic oil capacity (Refill):
Semi-U dozer or U dozer 34.3 US gal
Ripper equipment (Additional volume):
Giant ripper 11.9 US gal
Multi-shank ripper (variable) 11.9 US gal
Operating Weight
Tractor weight
Including rated capacity of lubricant, coolant, full fuel tank,
operator, and standard equipment.
56 340 kg
Operating weight
Including strengthened dual tilt Semi-U dozer blade, giant ripper,
24" extreme service shoes, cab, ROPS (ISO 3471), operator,
standard equipment, rated capacity of lubricant, coolant, and
full fuel tank.Including Semi-U tilt dozer, giant ripper, cab, ROPS,
operator, standard equipment, rated capacity of lubricant,
coolant, and full fuel tank.
73 410 kg
Ground pressure 148 kPa / 1.51 kg/cm²
Tractor weight
Including rated capacity of lubricant, coolant, full fuel tank,
operator, and standard equipment.
124,210 lbs.
Operating weight
Including strengthened dual tilt Semi-U dozer blade, giant ripper,
24" extreme service shoes, cab, ROPS (ISO 3471), operator,
standard equipment, rated capacity of lubricant, coolant, and
full fuel tank.Including Semi-U tilt dozer, giant ripper, cab, ROPS,
operator, standard equipment, rated capacity of lubricant,
coolant, and full fuel tank.
161,840 lbs.
Ground pressure 21.5 psi
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 4.2 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 13 ft. 9 in
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 prevent accidental starts.

Gear Forward Reverse
1st 3.5 kph 4.6 kph
2nd 6.8 kph 8.9 kph
3rd L 8.0 kph 9.7 kph
3rd 11.8 kph 15.8 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 prevent accidental starts.

Gear Forward Reverse
1st 2.2 mph 2.9 mph
2nd 4.2 mph 5.5 mph
3rd L 5.0 mph 6.0 mph
3rd 7.3 mph 9.8 mph
Undercarriage
Suspension Oscillating equalizer bar with shoulder pad 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) 93 mm
Shoe width (Standard) 610 mm
Ground contact area 48 560 cm²
Ground pressure (Tractor) 113 kPa / 1.16 kg/cm²
Number of track rollers 8
Number of carrier rollers 2
Extreme service shoes: Ground contact area: Ground** pressure:
610 mm
Additional weight:
0 kg
48 560 cm² 148.3 kPa / 1.51 kgf/cm²
710 mm
Additional weight:
680 kg
56 520 cm² 128.6 kPa / 1.31 kgf/cm²
810 mm
Additional weight:
1 360 kg
64 480 cm² 113.7 kPa / 1.16 kgf/cm²

** Ground pressure based on tractor, strengthened dual tilt Semi-U dozer blade, giant ripper, cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.

Suspension Oscillating equalizer bar with shoulder pad 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) 3.7 in
Shoe width (Standard) 24 in
Ground contact area 7,527 in²
Ground pressure (Tractor) 16.4 psi
Number of track rollers 8
Number of carrier rollers 2
Extreme service shoes: Ground contact area: Ground** pressure:
24 in
Additional weight:
0 lbs.
7,527 in² 21.5 psi
28 in
Additional weight:
1,500 lbs.
8,760 in² 18.6 psi
32 in
Additional weight:
3,000 lbs.
9,994 in² 16.5 psi

** Ground pressure based on tractor, strengthened dual tilt Semi-U dozer blade, giant ripper, cab, ROPS, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.

  • Air conditioner with heater and defroster
  • Alternator, 140 Ampere, 24V
  • Auto idle stop system
  • Auto/manual gearshift selectable modes
  • Auto pitch blade control
  • Auto ripper return
  • Back-up alarm
  • Batteries, 2 x 12 V, 160Ah
  • Blade lift cylinder, large capacity
  • Blower cooling fan
  • Canister style breathers
  • Centralized greasing
    - Blade cylinder yoke
    - Ripper
  • Circuit breaker panel w/ push button resets
  • Closed-center load sensing system (CLSS)
  • Cold weather -30C specification
  • Color monitor
  • Concentrated sampling points
  • Decelerator pedal
  • Double wiper for cab door
  • Dual tilt blade hydraulics
  • Dry-type air cleaner with dust evacuator and dust indicator
  • Eight-roller track frames
  • Electrical dust indicator
  • Engine precleaner w/ above the hood . air intake pipe
  • Engine prelubrication system
  • Exhaust pipe with rain cap
  • Final drive case wear guard
  • Heavy duty DT connectors
  • High altitude arrangement
  • High mount head lights
  • Hinged underguards with front pull hook
  • Horn, warning
  • Hydraulic track adjusters
  • Isolator box, battery and starter
  • Jump start recepticle
  • KOMTRAX Plus® with Iridium/Orbcomm
    • Lighting system
    • Access Lighting
    • Engine room lamp
    • LED lighting package
      - High mount on hood (2)
      - Front fender mount (2)
      - Additional cab mount (4)
      - Rear fender mount
    • (2) Ripper point light
  • Lunch box holder
  • Maintenance Service Center
  • Mirror, rearview
  • Oil level sensors (engine & hyd.)
  • PCCS lever steering control
  • Perforated side covers
  • Platform with hand rails and toe boards
  • PM service connectors
  • Radiator, Mesabi (L&M)
  • Radiator reserve tank
  • Radio, AM/FM and AUX
  • Rearview camera
  • ROPS:*
    - Weight: 580 kg
    - Width: 1,967 mm
    - Height:** 1,863 mm
  • Seat Air suspension type, heated and ventilated, fully adjustable, tilt and lumbar
  • Seat belt, 3" retractable
  • Segmented sprockets
  • Starting motors, 22 kW (2 x 11kW)
  • Steering, clutch and brake
  • Stop system, emergency (2)
  • Swingout radiator fan
  • TORQFLOW transmission, 3F/3R
  • Torque converter with lock-up clutch
  • Track frame, 8 track rollers, 2 carrier rollers
  • Track roller guards
  • Track shoe slip control
  • Two muffler with rain cap
  • Uninterrupted power source for 3rd party system
  • Vandalism protection kit
  • Wet steering clutches
  • Wiggins Drains - Rear Maintenance Service Center for hyd. oil, eng. oil, T/M oil, and eng. coolant
  • Wiggins fast fuel fill

* Meets ISO 3471 standards
** Compartment floor to ceiling

  • Air conditioner with heater and defroster
  • Alternator, 140 Ampere, 24V
  • Auto idle stop system
  • Auto/manual gearshift selectable modes
  • Auto pitch blade control
  • Auto ripper return
  • Back-up alarm
  • Batteries, 2 x 12 V, 160Ah
  • Blade lift cylinder, large capacity
  • Blower cooling fan
  • Canister style breathers
  • Centralized greasing
    - Blade cylinder yoke
    - Ripper
  • Circuit breaker panel w/ push button resets
  • Closed-center load sensing system (CLSS)
  • Cold weather -30C specification
  • Color monitor
  • Concentrated sampling points
  • Decelerator pedal
  • Double wiper for cab door
  • Dual tilt blade hydraulics
  • Dry-type air cleaner with dust evacuator and dust indicator
  • Eight-roller track frames
  • Electrical dust indicator
  • Engine precleaner w/ above the hood . air intake pipe
  • Engine prelubrication system
  • Exhaust pipe with rain cap
  • Final drive case wear guard
  • Heavy duty DT connectors
  • High altitude arrangement
  • High mount head lights
  • Hinged underguards with front pull hook
  • Horn, warning
  • Hydraulic track adjusters
  • Isolator box, battery and starter
  • Jump start recepticle
  • KOMTRAX Plus® with Iridium/Orbcomm
    • Lighting system
    • Access Lighting
    • Engine room lamp
    • LED lighting package
      - High mount on hood (2)
      - Front fender mount (2)
      - Additional cab mount (4)
      - Rear fender mount
    • (2) Ripper point light
  • Lunch box holder
  • Maintenance Service Center
  • Mirror, rearview
  • Oil level sensors (engine & hyd.)
  • PCCS lever steering control
  • Perforated side covers
  • Platform with hand rails and toe boards
  • PM service connectors
  • Radiator, Mesabi (L&M)
  • Radiator reserve tank
  • Radio, AM/FM and AUX
  • Rearview camera
  • ROPS:*
    - Weight: 1,280 lb
    - Width: 6' 5"
    - Height:** 6' 1"
  • Seat Air suspension type, heated and ventilated, fully adjustable, tilt and lumbar
  • Seat belt, 3" retractable
  • Segmented sprockets
  • Starting motors, 24V
  • Steering, clutch and brake
  • Stop system, emergency (2)
  • Swingout radiator fan
  • TORQFLOW transmission, 3F/3R
  • Torque converter with lock-up clutch
  • Track frame, 8 track rollers, 2 carrier rollers
  • Track roller guards
  • Track shoe slip control
  • Two muffler with rain cap
  • Uninterrupted power source for 3rd party system
  • Vandalism protection kit
  • Wet steering clutches
  • Wiggins Drains - Rear Maintenance Service Center for hyd. oil, eng. oil, T/M oil, and eng. coolant
  • Wiggins fast fuel fill

* Meets ISO 3471 standards
** Compartment floor to ceiling

  • Blade Semi-U Strengthened Dual Tilt
  • Blade Full-U Strengthened Dual Tilt
  • Counterweight: 4,736 kg
  • Extreme service shoes
    - 610 mm 
    - 710 mm 
    - 810 mm 
  • Extreme service shoes w/ extreme cold link assemblies
    - 610 mm 
    - 710 mm 
  • General tool kit
  • Optional tilt cylinder spacer kit
  • Power ladder
  • Short stroke tilt cylinder
  • Spare parts for first service
  • Straight frame assembly, dual tilt, less blade
  • Blade Semi-U Strengthened Dual Tilt
  • Blade Full-U Strengthened Dual Tilt
  • Counterweight: 10,441 lb
  • Extreme service shoes
    - 24"
    - 28"
    - 32"
  • Extreme service shoes w/ extreme cold link assemblies
    - 24"
    - 28"
  • General tool kit
  • Optional tilt cylinder spacer kit
  • Power ladder
  • Short stroke tilt cylinder
  • Spare parts for first service
  • Straight frame assembly, dual tilt, less blade
Support you can count on

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