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Motor graders

GD955-7

  • Engine power (HP) 426
  • Engine power (kW) 318
  • Operating weight (kg) 46740
  • Operating weight (lbs) 103044

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Introducing Komatsu's latest mining grader, the GD955-7. Weighing in at nearly 47 tonnes and 426 horsepower, this grader is designed to be a highly productive unit, achieved through its market leading blade down force and high engine horsepower enabling faster operating speed. The GD955 also boasts extended component lives compared to the previous model. The GD955-7 is built to thrive in the rugged conditions of Australian mining, and its structural integrity is a testament to Komatsu's design philosophy. The GD955 is well matched to larger haul trucks, making it a great addition to mining fleets. And it comes standard with Komatsu’s 360° camera system, KomVision, which houses a 5-camera system to provide a view around the vehicle using the KomVision monitor, with an additional rear view monitor for reversing and ripping operation.

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    Features and benefits

    Bearing type circle to greatly reduce downtime

    Bearing type circle to greatly reduce downtime

    A product first for Komatsu Graders, we are introducing a bearing for the blade swing circle, like that used on the PC300. With the factory installed autolube, the blade circle is maintenance free with no need for adjustments or replacement of wear plates. With a targeted bearing life of 16,000 hours, this drastically reduces downtime compared to the previous maintenance-intensive component.

    Operator environment featurs

    Operator environment featurs

    The GD955-7 features grader fingertip fine control functionality and a palm steer option for precise grading. For high speed tramming between job locations, we've retained the steering wheel.

    High productivity

    High productivity

    This grader has the highest effective blade down force, the longest wheelbase, the most power, fastest operating speed and the highest operating weight in its class.


    Specifications

    Metric Imperial (US)
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    • Maximum lift above ground (ft): 1.78
    • Maximum lift above ground (mm): 542
    • Maximum cutting depth (mm): 498
    • Maximum cutting depth (ft): 1.63
    • Blade tip angle forward (degrees): 53
    • Blade tip angle reverse (degrees): 3

    • Moldboard side shift

      • Blade range: right (moldboard)(ft): 2.7
      • Blade range: right (moldboard)(mm): 818
      • Blade range: left (moldboard)(mm): 916
      • Blade range: left (moldboard)(ft): 3

    • Maximum shoulder reach outside rear tyres (frame straight)

      • Blade range: right (maximum shoulder reach)(mm): 2126
      • Blade range: right (maximum shoulder reach)(ft): 7
      • Blade range: left (maximum shoulder reach)(mm): 2119
      • Blade range: left (maximum shoulder reach)(ft): 7

    • Engine Model: Komatsu SAA6D140E-7
    • Engine type: Water-cooled, 4-cycle, direct injection
    • Aspiration: Turbocharged and air to air aftercooled
    • Bore (in): 4.51
    • Bore (mm): 140
    • Stroke (in): 6.5
    • Stroke (mm): 165
    • Piston displacement (in^3): 929.98
    • Piston displacement (L): 15.24
    • Torque rise (%): 37
    • Fan speed (Max rpm): 1300 min-1
    • Air cleaner: 2-stage, dry-type

    • Engine power (manual mode)

      • SAEJ1995 - Gross (HP): 426
      • SAEJ1995 - Gross (kW): 318
      • ISO 14396 (HP): 426
      • ISO 14396 (kW): 318
      • ISO 9249 (net engine power)(kW): 311
      • ISO 9249 (net engine power)(HP): 417
      • Maximum torque (ft-lbs): 1585.8
      • Maximum torque (kgf-m): 219
      • Maximum torque (N-m): 2150

    • Dimensions (in): 216.19 x 37.80 x 0.98
    • Dimensions (mm): 5489 x 960 x 25
    • Arc radius (ft): 1.4
    • Arc radius (mm): 414
    • Cutting edge (mm): 254 x 25
    • Cutting edge (in): 10 x 1
    • Replaceable/Reversible side edges (mm): 204 x 490 x 19
    • Replaceable/Reversible side edges (in): 8.03 x 19.29 x 0.75
    • Blade pull (kgf): 26816 (Tier 4 Final)

    • Fuel tank (L): 717
    • Cooling system (US gal): 19 (Tier 3)
    • Cooling system (L): 72 (Tier 3)
    • Transmission (US gal): 22.5
    • Transmission (L): 85
    • Final drive (L): 56
    • Final drive (US gal): 14.79
    • Tandem housing (each)(US gal): 52.57
    • Tandem housing (each)(L): 199
    • Hydraulic system (L): 147
    • Circle reverse housing (US gal): 7.27
    • Hydraulic system (US gal): 38.83
    • Circle reverse housing (L): 27.5

    • Minimum turning radius for steering (ft) (in): 30.51
    • Minimum turning radius for steering (m): 9.3
    • Articulation (degree): 27

    • Front axle type: Solid bar construction welded steel sections
    • Ground clearance at pivot (mm): 710
    • Ground clearance at pivot (in): 27.95
    • Wheel lean angle, right or left (degrees): 14
    • Oscillation, total (degrees): 32

    • Diameter (outside) (mm): 1822
    • Circle reversing control hydraulic rotation (degrees): 130°

    • Ripping depth, maximum (mm): 537
    • Ripper shank holders: 7
    • Ripper shank holder spacing (mm): 501
    • Penetration force (kN): 232
    • Pryout force (lbs): 54408
    • Pryout force (kN): 242

    • Output (at engine rated rpm)(L/min): 315.2
    • Output (at engine rated rpm)(gpm): 83.25
    • Maximum system pressure(psi): 3982.52
    • Maximum system pressure(kg/cm^2): 280
    • Maximum system pressure(MPa): 27.5

    • Upper, Lower (mm): 28, 32
    • Upper, Lower (in): 1.10, 1.26

    • Drawbar frame(mm): 310 x 32

    • Blade down pressure (kg): 22230 (Tier 4 Final)

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