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Dozers

D155AXi-8

Large dozers

  • Horsepower (HP) 354 HP @ 1,900 rpm
  • Horsepower (kW) 264 kW @ 1 900 rpm
  • Operating weight (kg) 41 100
  • Operating weight (lbs) 90,610
  • Blade capacity (m^3) 9.4
  • Blade capacity (yd^3) 12.3

Purchase options

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A workhorse for your fleet

Your big jobs demand a big dozer. 350+ horsepower, massive blade capacity with semi-U and full U blades, automatic lockup torque converter, and low drive K-bogie suspended undercarriage designed for maximum traction and smooth ride when dozing or ripping.

  • Get new operators up to speed quickly
  • Go from mass ex to finished grading faster than ever
  • Fully integrate 3D design data into your machines
  • Empower operators to work efficiently, pass after pass

Features and benefits

Close the operator skill gap

Close the operator skill gap

Machine logic allows the dozer to continuously learn the terrain and make calculated decisions for the next pass. Intelligent Machine Control helps lessen the skill gap between new and experienced operators.

Advanced machine control

Advanced machine control

In select situations — auto stripping, rough dozing, spreading, advanced finish grading — operators can opt for nearly 100% machine control auto usage. They can even apply automatic control without having a 3D model.

A machine that learns from the operator

A machine that learns from the operator

Automatic functions give the dozer the ability to learn from operator's blade input, resulting in more adaptability, easier operation and less reliance on operator input.

Outstanding blade response for finish grading

Outstanding blade response for finish grading

To deliver unparalleled grading performance, IMC enables the dozer to look ahead at grade transitions and alter the blade angle accordingly.

Technology

Select continent

Intelligent Machine Control

Productivity is the key to success on your job site, and the faster your crew can reach a state of maximum productivity, the better. Now you have a powerful tool to help make that happen with Komatsu’s Intelligent Machine Control (IMC). Incorporating a host of advanced, proprietary machine technology, IMC gives you the opportunity to take advantage of sophisticated, productivity-enhancing automation and cutting-edge job site design.

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Improve your productivity with Smart Construction

Construction workforce shortages are prompting many firms to innovate their way to greater productivity.

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First U.S. IMC Customer: 5 Years of Growth

The first contractor to use Komatsu's revolutionary intelligent Machine Control is more efficient, productive than ever.

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Specifications

Metric Imperial (US)
Expand all

  • Suspension: Oscillation-type with equalizer bar and forward mounted pivot shafts
  • Track roller frame: Monocoque, high-tensile strength steel construction
  • Rollers and idlers: Lubricated track rollers are resiliently mounted the track frame with a bogie suspension system whose oscillating motion is cushioned by rubber pads.
  • Number of track rollers (each side): 7
  • Number of shoes (each side): 42
  • Number of carrier rollers (each side): 2
  • Lubricated tracks: Lubricated tracks. Unique dust seals for preventing entry of foreign abrasives into pin-to-bushing clearance for extended service. Track tension easily adjusted with grease gun.
  • Grouser height (in): 3.1
  • Grouser height (mm): 80
  • Shoe width (standard)(in): 24 - 28
  • Shoe width (standard)(mm): 610 - 710
  • Ground contact area (cm^2): 39 955
  • Ground contact area (ft2): 43
  • Ground pressure (with standard shoe)(ISO 16754)(psi): 11.6
  • Ground pressure (with standard shoe)(ISO 16754)(kpa): 80.3
  • Ground pressure (with standard shoe)(ISO 16754)(kg/cm^2): 0.82

  • 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 85.9 US gal for steering and 47.6 US gal 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 325 L/min for steering and 180 L/min for implement at rated engine rpm.
  • Relief valve setting (kg/cm^2): 280 - 390
  • Relief valve setting (psi): 3,980 - 5,550
  • Relief valve setting (MPa): 27.5 - 38.2
  • Control valve: Spool control valve for SIGMADOZER and Semi-U tilt dozer.
  • Number of cylinders

    • Blade tilt /1 (mm): 160
    • Blade tilt /1 (in): 6.3
    • Blade lift / 2 (mm): 110
    • Blade lift / 2 (in): 4.33
    • 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
  • Hydraulic cylinders

    • Hydraulic cylinders: Double-acting, piston type

  • Engine Model: Komatsu SAA6D140E-7**
  • Dozers type: 4-cycle, water-cooled, direct injection
  • Aspiration: Komatsu Variable Geometry Turbocharged, air-to-air aftercooled, cooled EGR
  • Number of cylinders: 6
  • Bore x stroke (in): 5.51 x 6.50
  • Bore x stroke (mm): 140 x 165
  • Piston displacement (L): 15.24
  • Piston displacement (in^3): 930
  • Governor: Mid-range, electronic
  • Footnote: *EPA Tier 4 Final emissions certified
  • Horsepower

    • SAEJ1995 - Gross (HP): 360
    • SAEJ1995 - Gross (kW): 268
    • ISO 9249 / SAE J1349 - Net (HP): 354
    • ISO 9249 / SAE J1349 - Gross (kW): 264
    • Rated RPM: 1,900
    • Fan drive type: Hydraulic
  • Lubrication system

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

  • Transmission features: Komatsu's automatic TORQFLOW transmission consists of a water-cooled, 3-element, 1-stage, 1-phase, torque converter with lockup clutch, and a planetary gear, multipledisc clutch transmission which is hydraulically actuated and force-lubricated for optimum heat dissipation. Equipped with gearshift lock lever and neutral safety switch.
  • Reverse

    • 1st torqflow reverse (kph): 4.6
    • 1st torqflow reverse (mph): 2.9
    • 2nd torqflow reverse (mph): 4.2
    • 2nd torqflow reverse (kph): 6.8
    • 3rd torqflow reverse (kph): 14
    • 3rd torqflow reverse (mph): 8.7
    • 3rdL torqflow reverse (mph): 5.7
    • 3rdL torqflow reverse (kph): 9.2
  • Forward

    • 1st torqflow forward (mph): 2.4
    • 1st torqflow forward (kph): 3.8
    • 2nd torqflow forward (mph): 3.5
    • 2nd torqflow forward (kph): 5.6
    • 3rd torqflow forward (mph): 7.2
    • 3rd torqflow forward (kph): 11.6
    • 3rdL torqflow forward (kph): 7.5
    • 3rdL torqflow forward (mph): 4.7

  • Fuel tank (L): 625
  • Fuel tank (US gal): 165
  • Diesel Exhaust Fluid (DEF) tank (US gal): 10.3
  • Diesel Exhaust Fluid (DEF) tank (L): 39
  • Coolant (US gal): 27.5
  • Coolant (L): 104
  • Engine oil (US gal): 9.8
  • Engine oil (L): 37
  • Damper case (L): 1.5
  • Damper case (US gal): 0.4
  • Torque converter, transmission, bevel gear, and steering system (L): 90
  • Torque converter, transmission, bevel gear, and steering system (US gal): 23.8
  • Final drive (US gal): 8.2
  • Final drive (L): 31
  • Hydraulic tank (L): 95
  • Hydraulic tank (US gal): 25.1
  • Hydraulic oil tank (US gal): 25.1
  • Hydraulic oil tank (L): 95
  • Ripper equipment (additional volume)

    • Grant ripper (US gal): 9.8
    • Grant ripper (L): 37
    • Multi-shank ripper (L): 37
    • Multi-shank ripper (US gal): 9.8

  • Steering system features: PCCS lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to the left to make a left turn. Tilt it to the right for a right turn. Hydrostatic steering system (HSS) is powered by steering planetary units and an independent hydraulic pump and motor. Counter-rotation turns are also available. Wet, multiple-disc, pedal-controlled service brakes are spring-actuated and hydraulically released. Gearshift lock lever also applies parking brakes.
  • Minimum turning radius (in): 84
  • Minimum turning radius (m): 2.14

  • Ground pressure (kPa): 100.9
  • Ground pressure (kg/cm^2): 1.03
  • Ground pressure (psi): 14.6
  • Operator weight (approximate): Including strengthened SIGMADOZER, giant ripper, ROPS cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.
  • Tractor weight

    • Tractor weight (lbs): 72,233
    • Tractor weight (kg): 32 760
    • Tractor weight inclusions: Including rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment (including ROPS cab).
  • Operating weight

    • Operating weight (kg): 41 100
    • Operating weight (lbs): 90,610

  • 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. Triple labyrinth protects seals and improves durability.
Metric Imperial (US)
  • Air cleaner, double element with dust indicator
  • Alternator, 140 ampere/24V
  • Backup alarm
  • Batteries, 200 Ah/2 x 12V
  • Battery disconnect switch
  • Blade lift cylinders with double dust seal
  • Color monitor, LCD
  • Decelerator pedal
  • Engine hood
  • Engine idle auto shutdown with adjustable timer
  • Engine intake centrifugal precleaner
  • Engine, gull-wing side covers
  • Engine shutdown secondary switch
  • Exhaust pipe with raincap
  • Fast fuel provision
  • Fenders
  • Front pull hook
  • Fuel pre-filter and primary filter
  • Grid heater starting aid in cold weather
  • High mount foot rests
  • Horn, warning
  • Hydraulic driven radiator cooling fan with manual reverse clean mode
  • Hydraulics for dual tilt and pitch dozer
  • Hydraulics for ripper VGR/MSR
  • KOMTRAX® Level 5
  • K-bogie undercarriage
  • Komatsu Diesel Particulate Filter (KDPF)
  • Komatsu Variable Geometry Turbocharger (KVGT)
  • Komatsu Selective Catalytic Reduction (SCR)
  • Locks, filler caps and covers
  • Oil pressure check ports for power train
  • PM service connector
  • Radiator mask, double door, heavy-duty, hinged, perforated
  • Radiator reserve tank
  • Rear cover
  • ROPS Cab (3,131 lb)**
    • Air conditioner/heater/defroster
      --Pressurized
      --Condenser remote mounted
    • Cab accessories
    • Work lights
      --2 front, hood mounted
      --2 front, Cab mounted
      --2 rear, fender mounter
      --2 rear, Cab mounted
      --1 rear, for ripper point
  • Seat, air suspension, fabric, heated, low back, rotates 12.5° to right, headrest
  • Seat belt, 3", retractable
  • Seat belt indicator
  • Sealed electrical connectors
  • Starting motor, 24V
  • Steering system: Hydrostatic Steering System (HSS)
  • Torque converter with auto lock-up
  • Track roller guards, end sections
  • Track shoe assembly
    • Sealed and lubricated
      24" extreme service shoes
  • Transmission with auto/manual shift modes
  • Underguards, heavy duty
  • Hinged belly pans
  • Water separator, fuel
  • Wide core cooling package, 6 fins per inch spacing
  • Air cleaner, double element with dust indicator
  • Alternator, 140 ampere/24V
  • Backup alarm
  • Batteries, 200 Ah/2 x 12V
  • Battery disconnect switch
  • Blade lift cylinders with double dust seal
  • Color monitor, LCD
  • Decelerator pedal
  • Engine hood
  • Engine idle auto shutdown with adjustable timer
  • Engine intake centrifugal precleaner
  • Engine, gull-wing side covers
  • Engine shutdown secondary switch
  • Exhaust pipe with raincap
  • Fast fuel provision
  • Fenders
  • Front pull hook
  • Fuel pre-filter and primary filter
  • Grid heater starting aid in cold weather
  • High mount foot rests
  • Horn, warning
  • Hydraulic driven radiator cooling fan with manual reverse clean mode
  • Hydraulics for dual tilt and pitch dozer
  • Hydraulics for ripper VGR/MSR
  • KOMTRAX® Level 5
  • K-bogie undercarriage
  • Komatsu Diesel Particulate Filter (KDPF)
  • Komatsu Variable Geometry Turbocharger (KVGT)
  • Komatsu Selective Catalytic Reduction (SCR)
  • Locks, filler caps and covers
  • Oil pressure check ports for power train
  • PM service connector
  • Radiator mask, double door, heavy-duty, hinged, perforated
  • Radiator reserve tank
  • Rear cover
  • ROPS Cab (1420 kg)**
    • Air conditioner/heater/defroster
      --Pressurized
      --Condenser remote mounted
    • Cab accessories
    • Work lights
      --2 front, hood mounted
      --2 front, Cab mounted
      --2 rear, fender mounter
      --2 rear, Cab mounted
      --1 rear, for ripper point
  • Seat, air suspension, fabric, heated, low back, rotates 12.5° to right, headrest
  • Seat belt, 76 mm, retractable
  • Seat belt indicator
  • Sealed electrical connectors
  • Starting motor, 11.0 kW
  • Steering system: Hydrostatic Steering System (HSS)
  • Torque converter with auto lock-up
  • Track roller guards, end sections
  • Track shoe assembly
    • Sealed and lubricated
      610 mmextreme service shoes
  • Transmission with auto/manual shift modes
  • Underguards, heavy duty
  • Hinged belly pans
  • Water separator, fuel
  • Wide core cooling package, 6 fins per inch spacing
Metric Imperial (US)

Shoes, single grouser - Additional weight

  • 26" extreme service: +530 lb
  • 28" moderate service: No additional
  • 24" PLUS extreme service: +1,254 lb
  • 26" PLUS extreme service: +1,806 lb
  • 28" PLUS extreme service: +2,269 lb

Shoes, single grouser - Ground contact area

  • 26" extreme service: 6,700 in2
  • 28" moderate service: 7,208 in2
  • 24" PLUS extreme service: 6,193 in2
  • 26" PLUS extreme service: 6,700 in2
  • 28" PLUS extreme service: 7,208 in2

Variable Multi-Shank Ripper:

  • Additional weight (including hydraulic control unit): 8,290 lb
  • Beam length: 7'7"
  • Hydraulically-controlled parallelogram-type ripper with three shanks. Digging angle infinitely adjustable. Standard digging angle: 49°
  • Maximum digging depth: 2'11"
  • Maximum lift above ground: 3'1"

Variable Giant Ripper

  • Additional weight (including hydraulic control unit): 5,380 lb
  • Beam length: 4'7"
  • Hydraulically-controlled parallelogram-type ripper with one shank. Digging angle infinitely adjustable. Standard digging angle: 49°
  • Maximum digging depth: 4'1"
  • Maximum lift above ground: 3'1"

Other

  • HD Counterweight 9-plate with rigid drawbar, 7,860 lb

Dozer equipment

  • SIGMADOZER®
  • Semi-U

Shoes, single grouser - Additional weight

  • 26" extreme service: +240 kg
  • 28" moderate service: No additional
  • 24" PLUS extreme service: +569 kg
  • 26" PLUS extreme service: +819 kg
  • 28" PLUS extreme service: +1029 kg

Shoes, single grouser - Ground contact area

  • 26" extreme service: 43 230 cm2
  • 28" moderate service: 46 505 cm2
  • 24" PLUS extreme service: 39 955 cm2
  • 26" PLUS extreme service: 43 230 cm2
  • 28" PLUS extreme service: 46 505 cm22

Variable Multi-Shank Ripper:

  • Additional weight (including hydraulic control unit): 3760 kg
  • Beam length: 2320 mm
  • Hydraulically-controlled parallelogram-type ripper with three shanks. Digging angle infinitely adjustable. Standard digging angle: 49°
  • Maximum digging depth: 900 mm
  • Maximum lift above ground: 950 mm

Variable Giant Ripper

  • Additional weight (including hydraulic control unit): 2440 kg
  • Beam length: 1400 mm
  • Hydraulically-controlled parallelogram-type ripper with one shank. Digging angle infinitely adjustable. Standard digging angle: 49°
  • Maximum digging depth: 1240 mm
  • Maximum lift above ground: 950 mm

Other

  • HD Counterweight 9-plate with rigid drawbar, 3568 kg

Dozer equipment

  • SIGMADOZER®
  • Semi-U