• Engine

    Model Komatsu SAA6D107E-1
    Type 4-cycle, water-cooled, direct injection
    Aspiration Turbocharged, after-cooled diesel
    Number of Cylinders 6
    bore x stroke 107 mm x 124 mm
    Horsepower, Gross - SAE J1995 99 kW / 133 HP
    Horsepower, Net - ISO 9249 / SAE J1349 97 kW / 130 HP
    Rated RPM 2200
    Piston displacement 6.69 ltr
    Fan drive type Hydraulic
    Lubrication system Gear pump
    Emissions certification EPA Tier 3
  • Hydraulic System

    Type Closed-centre load sensing system
    Maximum pump flow 99 ltr/min
    Relief valve setting 27.6 bar
    Hydraulic cylinder No. of cylinders x bore
    Blade lift 2 x 90 mm
    Blade tilt 1 x 100 mm
    Blade angle 2 x 90 mm
    Ripper lift 1 x 110 mm
  • Hydrostatic Transmission

    Type Dual-path, hydrostatic transmission System
    Travel motor Variable capacity
    Travel speeds  
    Forward 0 - 9 km/h
    Reverse 0 - 9 km/h


  • Final drives

    Type Two-stage planetary gear
    Sprocket Bolted on Segmented sprocket teeth
  • Steering system

    Type Hydrostatic Steering system
    Minimum turning radius 1.81 - 1.89 m
  • Undercarriage

    Suspension Oscillating equaliser bar and piv shaft
    Track roller frame Monocoque, large section, durable construction
    Rollers and idlers Lubricated track rollers
    Number of track rollers (each side) 7
    Type of shoes Single grouser
    Number of shoes (each side) 44
    Shoe width 560 - 710 mm
  • Coolant & Lubricant capacity

    Coolant 35 ltr
    Fuel tank 270 ltr
    Engine oil 20 ltr
    Hydraulic tank 63 ltr
    Final drive (each side) 4.0 ltr
    DEF tank None
  • Weights

    Operating weight 12,710 - 13,100 kg

D51EX/PX-22 Dozers

The 13.22-13.77 tonne D51EX/PX-22 dozer, available in standard and low-ground-pressure undercarriage versions, provides unrivalled visibility to the working area through its forward-sloping bonnet design, plus a highly efficient hydrostatic transmission. Applications include civil construction, local government and other sectors. As with all our dozers, key components are designed and manufactured by Komatsu to work together in an integrated package. And it comes standard with our KOMTRAX remote monitoring and location system, backed by our Australia-wide service and support network.

  • 97 kW / 130 HP
  • 12,710 kg
  • 2.9 m³

Highly Efficient Hydrostatic Driveline

The hydrostatic driveline is a key factor in the performance of the D51EX/PX-22 dozer. It supplies high drawbar pull when needed and a highly fuel efficient drive line for grading and precision work. With a choice between two operating modes, the operator can select either "quick-shift" or "variable speed" to match a complete range of applications in the most economic and easy way.

Efficient Hydrostatic Engine Cooling Fan

The cooling fan always runs at the lowest convenient speed. Rotation and velocity are electronically adjusted based on the temperature of the engine coolant and hydraulic oil. This reduces fuel consumption and operating noise levels, and requires less horsepower than a belt-driven fan. For extra efficiency, the fan also has a large air outlet surface, and the complete inlet area is protected by a fine grid to prevent small particles from entering the fan area.

Easy Operation Control

The ergonomic Palm Command Control System (PCCS) provides efficient and comfortable steering of the machine, and the blade control joystick utilises Proportional Pressure Control (PPC) for precise operations, excellent and easy grading jobs - and improved productivity.


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