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Dozers

D71EXi-24

Mid-size dozers

  • Horsepower (HP) 237 HP @ 2,200 rpm
  • Horsepower (kW) 177 k @ 2 200 rpm
  • Operating weight (kg) 22 700
  • Operating weight (lbs) 50,045
  • Blade capacity (m^3) 4.4
  • Blade capacity (yd^3) 5.8

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An all-around dozer that delivers

How do you make one of the industry's most capable, dependable dozers even better? Make it smart. The industry's newest slant-nosed, intelligent HST dozer features the latest IMC 2.0 capabilities, and patent-pending proactive dozing control with the ability to operate automatically 100% of the time.

  • IMC 2.0 built-in features to increase productivity
  • Increased overall travel speed and now 4 speed presets
  • Fast travel and steering response from HST drive

Features and benefits

Learns as it works

Learns as it works

With proactive dozing control, even your less experienced operators can automatically cut/strip from existing terrain. The dozer measures the terrain it tracks over and uses that data to plan the next pass. Can improve productivity by up to 60% versus previous generation.

Spreads fill material automatically

Spreads fill material automatically

Lift layer control automatically lets your operators spread fill from existing terrain with the press of a button. The dozer measures the terrain it tracks over and uses the data it gathers to plan the next pass. Attain up to double your production and achieve consistent layers for compaction quality.

Levels material even during rough dozing

Levels material even during rough dozing

Tilt steering control automatically tilts the blade to maintain straight travel during rough dozing. Reduces operator steering input by up to 80%.

Quick surface creation

Quick surface creation

Operators can create a temporary design surface with the press of a button. Combined with other IMC 2.0 functions, your crew can begin stripping or spreading using automated input while waiting for the finish grade model.

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.


Specifications

Metric Imperial (US)
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  • Suspension: Oscillating-type with equalizer bar and pivot shafts
  • Track roller frame: Monocoque, large section, durable construction
  • Rollers and idlers: Lubricated track rollers
  • Type of shoes (standard): Single grouser
  • Number of track rollers (each side): 8
  • Number of shoes (each side): 45
  • Lubricated tracks: Parallel Link Undercarriage System (PLUS) with lubricated rotating bushings for extended system wear life and lower maintenance costs. Track tension is adjusted easily with grease gun.
  • Grouser height (in): 2.6
  • Grouser height (mm): 65
  • Shoe width (standard)(mm): 610
  • Shoe width (standard)(in): 24
  • Ground contact area (cm^2): 39 960
  • Ground contact area (ft2): 43
  • Ground pressure (with standard shoe)(ISO 16754)(psi): 6.3
  • Ground pressure (with standard shoe)(ISO 16754)(kpa): 43
  • Track gauge (mm): 2 230
  • Track gauge (ft): 7 ft. 3 in
  • Length of track on ground (mm): 3 275
  • Length of track on ground (ft): 10 ft. 8.9 in

  • Hydrostatic transmission features: Dual-path, hydrostatic transmission provides infinite speed changes up to 9.0 km/h 5.6 mph. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Travel control lock lever and neutral switch.
  • Reverse

    • 1st reverse (kph): 0 - 4.5
    • 1st reverse (mph): 0 - 2.8
    • 2.5th (kph): 0 - 9.3
    • 2.5th (mph): 0 - 5.8
    • 2nd reverse (mph): 0 - 4.7
    • 2nd reverse (kph): 0 - 7.5
    • 3rd reverse (kph): 0 - 11
    • 3rd reverse (mph): 0 - 6.8
    • Travel speed reverse (variable mode) (kph): 0,8 - 11
    • Travel speed reverse (variable mode) (mph): 0.5 - 6.8
  • Forward

    • 1st forward (kph): 0 - 3.8
    • 1st forward (mph): 0 - 2.4
    • 2.5th forward (mph): 0 - 5.2
    • 2.5th forward (kph): 0 - 8.4
    • 2nd forward (kph): 0 - 6.5
    • 2nd forward (mph): 0 - 4
    • 3rd forward (kph): 0 - 11
    • 3rd forward (mph): 0 - 6.8
    • Travel speed forward (variable mode) (kph): 0.8 - 11
    • Travel speed forward (variable mode) (mph): 0.5 - 6.8

  • Hydraulic system features: Closed-Center Load Sensing System (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.
  • Hydraulic control unit (ltr/min): All spool control valves externally mounted remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 235 L/min at rated engine rpm.
  • Hydraulic control unit (U.S. gal/min): All spool control valves externally mounted remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 62.3 US gpm at rated engine rpm.
  • Relief valve setting (psi): 4,177
  • Relief valve setting (kg/cm^2): 294
  • Relief valve setting (MPa): 28.8
  • Control valve: 3-spool control valve for power angle tilt dozer
  • Hydraulic oil capacity (refill)

    • Power angle tilt dozer (US gal): 40.7
    • Power angle tilt dozer (L): 154
  • Number of cylinders

    • Blade tilt /1 (in): 5.1
    • Blade tilt /1 (mm): 130
    • Blade lift / 2 (in): 4.7
    • Blade lift / 2 (mm): 120
    • Blade angle / 2 (in): 4.3
    • Blade angle / 2 (mm): 110
    • Positions

      • Blade lift: Raise, hold, lower, and float
      • Blade tilt: Right, hold, and left
      • Blade angle: Right, hold, and left
      • Ripper lift: Raise, hold and lower
  • Hydraulic cylinders

    • Hydraulic cylinders: Double-acting, piston type

  • Engine Model: Komatsu SAA6D114E-6*
  • 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): 4.5 x 5.7
  • Bore x stroke (mm): 114 x 144.5
  • Piston displacement (L): 8.85
  • Piston displacement (in^3): 540
  • Governor: All-speed and mid-range, electronic
  • Footnote: *EPA Tier 4 Final emissions certified
  • Horsepower

    • SAEJ1995 - Gross (kW): 179
    • SAEJ1995 - Gross (HP): 240
    • ISO 9249 / SAE J1349 - Net (HP): 237
    • ISO 9249 / SAE J1349 - Gross (kW): 177
    • Rated RPM: 2,100
    • Fan drive type: Hydraulic
    • Hydraulic fan at maximum speed - net (kW): 159
    • Hydraulic fan at maximum speed - net (HP): 213
  • Lubrication system

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

  • Fuel tank (US gal): 116
  • Fuel tank (L): 439
  • Diesel Exhaust Fluid (DEF) tank (L): 20
  • Diesel Exhaust Fluid (DEF) tank (US gal): 5.3
  • Coolant (US gal): 14.4
  • Coolant (L): 54.5
  • Engine oil (US gal): 8.1
  • Engine oil (L): 30.5
  • Final drive (L): 10
  • Final drive (US gal): 2.6
  • Hydraulic tank (L): 154
  • Hydraulic tank (US gal): 40.7

  • Operator weight (approximate): Operating weight: Including PAT dozer, ROPS (ISO 3471) cab, operator, standard equipment, rated capacity of lubricant, coolant and full fuel tank.
  • Tractor weight

    • Tractor weight (kg): 21 350
    • Tractor weight (lbs): 47,069
    • Tractor weight inclusions: Including ROPS (ISO 3471) cab, U frame for PAT dozer, rated capacity of lubricant, coolant, full fuel tank, operator and standard equipment.
  • Operating weight

    • Operating weight (lbs): 50,045
    • Operating weight (kg): 22 700

  • Steering system features: PCCS joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it backward reverses the machine. Simply tilt the joystick to the left or right to make a turn. Tilting the joystick fully to the left or right activates counter-rotation. HST eliminates steering clutches and brakes, providing smooth, powerful turns. Fully electronic control enables smooth operation. The PCCS utilizes shift buttons to increase and decrease speed.
  • Minimum turning radius (in): 122
  • Minimum turning radius (m): 3.1

  • Final drive features: In-shoe mounted axial piston type travel motors with integrated two-stage planetary gear reduction. Compact in-shoe mount can reduce risk of damage by debris. Bolt-on sprocket for easy displacement.
Metric Imperial (US)
  • Air cleaner, double element with dust indicator
  • Air suspension seat with operator presence sensing system
  • Alternator, 24 V/90 A
  • Backup alarm
  • Batteries, 2 x 12 V/140 Ah
  • Closed Engine hood
  • Color monitor, Liquid Crystal Display (LCD)
  • Decelerator/brake pedal (Single pedal)
  • Engine intake precleaner (Auto eject)
  • Expansion tank
  • Fuel prefilter with water separator
  • High mount foot rests
  • Hitch type drawbar
  • Hydraulically driven cooling fan with clean mode
  • Komatsu Diesel Particulate Filter (KDPF) with curved exhaust pipe
  • Locks, filler caps and covers
  • Radiator mask, swing up
  • Rear view monitor system
  • Starting motor, 11 kW/24 V
  • Steering system: HST system
  • Tie-offs
  • Track roller guard, center and end section
  • Track shoe assembly
    —Parallel Link Undercarriage System (PLUS) link
    24" single grouser shoe (EX)
    30" single grouser shoe (PX)
    36" single grouser shoe (PX wide)
  • Underguards:
    Oil pan and hydraulic pumps

    ROPS Cab*

  • Air conditioner (A/C)
  • AUX-injack
  • Cab accessories
    —12 V x 2 power supply
    —Cup holder
    —Rear view mirror
  • Front pull hook
  • LED lights
  • Multifunction Audio
  • Work lamps (Front 4, rear 2)

* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS (ISO 3471) and FOPS (ISO 3449) Level 2 standards

  • Air cleaner, double element with dust indicator
  • Air suspension seat with operator presence sensing system
  • Alternator, 24 V/90 A
  • Backup alarm
  • Batteries, 2 x 12 V/140 Ah
  • Closed Engine hood
  • Color monitor, Liquid Crystal Display (LCD)
  • Decelerator/brake pedal (Single pedal)
  • Engine intake precleaner (Auto eject)
  • Expansion tank
  • Fuel prefilter with water separator
  • High mount foot rests
  • Hitch type drawbar
  • Hydraulically driven cooling fan with clean mode
  • Komatsu Diesel Particulate Filter (KDPF) with curved exhaust pipe
  • Locks, filler caps and covers
  • Radiator mask, swing up
  • Rear view monitor system
  • Starting motor, 11 kW/24 V
  • Steering system: HST system
  • Tie-offs
  • Track roller guard, center and end section
  • Track shoe assembly
    —Parallel Link Undercarriage System (PLUS) link
    610 mm single grouser shoe (EX)
    760 mm single grouser shoe (PX)
    915 mm single grouser shoe (PX wide)
  • Underguards:
    Oil pan and hydraulic pumps

    ROPS Cab*

  • Air conditioner (A/C)
  • AUX-injack
  • Cab accessories
    —12 V x 2 power supply
    —Cup holder
    —Rear view mirror
  • Front pull hook
  • LED lights
  • Multifunction Audio
  • Work lamps (Front 4, rear 2)

* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS (ISO 3471) and FOPS (ISO 3449) Level 2 standards

Metric Imperial (US)
  • Hydraulics for ripper (EXI)
  • Long drawbar
  • Scoop holder
  • Tool kit
  • Track roller guard, full length

Multi-shank ripper (for D65EX/WX)

  • Weight (including hydraulic control unit): 3,924 lb
  • Beam length: 7'1"
  • Maximum lift above ground: 2'1"
  • Maximum digging depth: 1'11"
  • Hydraulics for ripper (EXI)
  • Long drawbar
  • Scoop holder
  • Tool kit
  • Track roller guard, full length

Multi-shank ripper (for D65EX/WX)

  • Weight (including hydraulic control unit): 1780 kg
  • Beam length: 2170 mm
  • Maximum lift above ground: 640 mm
  • Maximum digging depth: 580 mm

Technology

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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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Integrated machine control 100% of the time

The fully integrated dozing control system allows you to perform auto-stripping, auto-spreading and high production dozing, as well as finish grading.

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Smart Construction

Improve accuracy on your job site with Smart Construction — a suite of tech solutions that helps you optimize your operations.

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D71-24 Slant Nose Dozer Infographic

slant nose dozer, infographic, line of sight, low resolution for on-screen use, construction, layout, design, D71PX-24, D71PX

Komatsu Intelligent Machine Control 2.0

Introducing iMC 2.0, with new features like quick-design creation, tilt steering control and lift layer control that allows the operator to auto-spread in consistent layers for proper compaction and drying.

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