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Versatile enough to accomplish rough dozing to grading, Komatsu’s largest hydrostatic transmission dozer H mode helps operators maintain ground speed while operating under heavy loads. Distinctive slant nose design offers operators exceptional visibility and precision on the job site.

  • Can handle heavier dozing and fine grading
  • Fast travel and steering response from HST drive
  • PLUS helps keep maintenance costs low

Product Features and benefits:

  1. Outstanding Visibility and Control

    Benefit from exceptional visibility to cutting edges, balanced maneuverability, and a super-slant nose cab-forward design. This emphasizes the Dozer_D71’s drivemodes and features, highlighting its focus on providing operators with outstanding visibility.

  2. Smooth Shifting and Control

    Hydrostatic Steering for Smooth Turns – Experience smooth and powerful turns through hydrostatic steering. The fully electronic control system ensures seamless automatic shifting, offering options for Quick-Shift or variable speed selection. This captures the Dozer_D71PXi in action, showcasing its smooth operation.

  3. Adaptable Engine Modes

    Tailored Engine Performance – Select the right mode for the job with the Dozer_D71i. In P mode, the engine delivers full power for heavy-load work, automatically adjusting engine speed for maximum power under increased load. H mode increases engine high idle speed, suitable for power-intensive tasks. Refer to the attached image for a glimpse into the Dozer_D71i’s versatile modes.

  4. Productive Adjustable Blade

    Versatile 6-Way PAT Blade – Achieve efficiency and productivity across diverse terrains with the Dozer_D71i’s versatile 6-way PAT (power angle tilt) blade pitch system. This showcases the Dozer_D71i’s adaptability in various situations.

  5. Easy-Access Maintenance Features

    Convenient Maintenance Access – Easily access essential components like the radiator, oil cooler, and charge air cooler with the swing-up assisted lift system. The hydraulic fan allows for clearing objects obstructing airflow. The rear-mounted single-plane cooling system swings up for swift service. The attached image illustrates the machine’s long-lasting undercarriage and maintenance features.

  6. Long-Lasting Undercarriage

    Komatsu PLUS Undercarriage – Designed for even wear, the Komatsu PLUS undercarriage ensures close to 100% utilization of undercarriage components. Strengthened rollers and links increase wear life up to two times, contributing to a reduction in maintenance costs. The provided image showcases the Dozer_D71’s undercarriage durability.

  7. Low Ground Pressure Adaptability

    Optional Wide Shoe for Low Ground Pressure – Enhance versatility with the optional 36-inch wide shoe, addressing low ground pressure needs. The image highlights the dozer’s readiness for various applications.

  8. Comfortable and Ergonomic Controls

    Palm Command Control System (PCCS) Joystick – Prioritize operator comfort with ergonomic and low-effort palm command control system (PCCS) joystick controls. Manage all directional movements, including machine travel speed and counter-rotation, with ease. The image emphasizes the dozer’s ergonomic controls.

  9. Connectivity and Entertainment Features

    Bluetooth/USB-Compatible Radio – Maximize operator comfort and connectivity with the D71’s standard Bluetooth AM/FM radio, complemented by additional AUX and USB connection capability. The image provides a visual representation of the dozer’s Bluetooth/USB-compatible radio.

Product Specifications for D71EX-24:


  • Model: Komatsu SAA6D114E-6
  • 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: 4.5 x 5.7 in
  • Piston displacement: 540 in³
  • Governor: All-speed and mid-range, electronic
  • Horsepower:
    • SAE J1995 – Gross: 240 HP
    • ISO 9249 / SAE J1349 – Net: 237 HP
    • Hydraulic fan at maximum speed: 213 HP
  • Rated rpm: 2,100 rpm
  • Fan drive type: Hydraulic
  • EPA Tier 4 Final emissions certified

Hydrostatic Transmission:

  • Dual-path, hydrostatic transmission provides extensive speed changes up to 6.8 mph.
  • Variable capacity travel motors for selecting optimum speed.
  • Travel control lock lever and neutral switch.
  • Quick shift speeds are adjustable in the monitor.

Final Drive:

  • In-shoe mounted axial piston type travel motors with integrated two-stage planetary gear reduction.
  • Compact in-shoe mount reduces the risk of damage by debris.
  • Bolt-on sprocket for easy displacement.

Steering System:

  • PCCS joystick control for all directional movements.
  • HST eliminates steering clutches and brakes for smooth turns.
  • Fully electronic control for smooth operation.
  • Minimum turning radius:
    • D71EX-24/ D71EXi-24: 10 ft. 2 in


  • Suspension: Oscillating-type with equalizer bar and pivot shafts
  • Track roller frame: Monocoque, large section, durable construction
  • Rollers and idlers: Lubricated track rollers
  • Lubricated tracks: Parallel Link Undercarriage System (PLUS) with lubricated rotating bushings for extended system wear life and lower maintenance costs.
    • D71EX-24/ D71EXi-24
      • Number of track rollers (each side): 8
      • Type of shoes (standard): Single grouser
      • Number of shoes (each side): 45
      • Grouser height: 2.6 in
      • Shoe width (standard): 24 in
      • Ground contact area: 43 ft²
      • Ground pressure (with dozer, ROPS cab) (ISO 16754): 6.3 psi
      • Track gauge: 7 ft. 3 in
      • Length of track on ground: 10 ft. 8.9 in

Service Refill Capacities:

  • Coolant: 14.4 US gal
  • Fuel tank: 116.0 US gal
  • Engine oil: 8.1 US gal
  • Hydraulic tank: 40.7 US gal
  • Final drive (each side): 2.6 US gal
  • DEF tank: 5.3 US gal

Operating Weight (Approximate): Tractor weight (Including ROPS cab, U frame for PAT dozer, rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment):

  • D71EXi-24: 47,069 lbs.

Operating weight (Including PAT dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank):

  • D71EX-24: 49,824 lbs.
  • D71EXi-24: 50,045 lbs.

Hydraulic System:

  • Closed-Center Load Sensing System (CLSS) designed for precise and responsive control.
  • Hydraulic control unit: All spool control valves externally mounted remote to the hydraulic tank.
  • Piston-type hydraulic pump with a capacity (discharge flow) of 62.3 US gpm at the rated engine rpm.
  • Relief valve setting: 4,177 psi
  • Hydraulic cylinders: Double-acting, piston type
    • Blade lift (2): 4.7 in
    • Blade tilt (1): 5.1 in
    • Blade angle (2): 4.3 in

Control Valves:

  • 3-spool control valve for Power Angle Tilt dozer
    • Positions:
      • Blade lift: Raise, hold, lower, and float
      • Blade tilt: Right, hold, and left
      • Blade angle: Right, hold, and left
  • Additional control valve required for ripper
    • Positions:
      • Ripper lift: Raise, hold, and lower

Further information on this machine can be viewed by visiting this link

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DISCLAIMER: The information that has been provided in this article is sourced from The author does not assume any responsibility or liability for the accuracy, completeness, or usefulness of the information provided. The author shall not be held liable for any loss or damage resulting from the use of this content. For further information please contact the manufacturer directly.