When you require heightened efficiency in maintaining your quarry or mine site, opt for the powerful capabilities of Komatsu’s GD955-7 motor grader to efficiently clear the way. This motor grader boasts best-in-class blade downforce pressure for effective grading performance and ample horsepower to enhance productivity. It is designed to help you construct and maintain stable, efficient roads for your haulage operation.
Key features include:
- 50% more operating weight for increased blade downforce pressure and stability
- Up to 33% increase in productivity with an 18-foot moldboard*
- Up to 46% increase in productivity with a 20-foot moldboard*
- Up to 21% reduction in total maintenance time with a circle bearing system and auto-lubrication*
*Compared to the previous model
Product Features and benefits:
Get Consistent, Reliable Grades:
- Achieve consistent, reliable grades with the GD955-7, thanks to its long wheelbase and heavy operating weight, enabling high blade downforce pressures at aggressive moldboard angles.
Work Effectively in Confined Areas:
- Enhance maneuverability in confined spaces and around obstacles with the GD955-7’s large 27-degree articulation angle, providing a tight turning radius for narrow haul road applications.
Strong and Durable Structure:
- With redesigned front and rear frames, the GD955-7 boasts increased strength to withstand bending forces and torsional loads, leading to reduced life-cycle costs and an extended service life.
Make Maintenance Easy:
- Simplify maintenance with the adoption of a bearing-type circle assembly, eliminating wear plates and the need for frequent play adjustments.
- The auto-lubrication system further reduces maintenance times by up to 21% compared to the previous model.
Optimize Your Machine’s Performance:
- Centrally located, ground-level service center facilitates routine checks, inspections, and repairs, promoting machine uptime and streamlining maintenance workflow.
Flexible for All Operator Levels:
- Boost production efficiency with the GD955-7’s direct-drive transmission and torque converter drive transmission, suitable for operators of all experience levels and various tasks, including haul road maintenance and construction.
Stay Comfortable While Working:
- Operators can work comfortably throughout the day with the air-suspension, heated, and ventilated seat that dampens mechanical vibrations.
- The control lever console height is adjustable, either electronically or manually, to cater to individual preferences.
Precise Control for Efficient Operation:
- Controls within easy reach enable quick adjustments to changing grading conditions or terrain, optimizing performance.
- Fingertip controls contribute to a more ergonomic and comfortable working environment.
Facilitating Work Site Visibility:
- The hexangular cab and integrated control console layout improve visibility to the moldboard.
- Strategically placed mirrors and the KomVision system provide a bird’s-eye view around the vehicle on an in-cab monitor.
Specifications for GD655-7:
Engine
- Model: Komatsu SAA6D140E-7
- Type: Water-cooled, 4-cycle, direct injection
- Aspiration: Turbocharged and air-to-air aftercooled
- No. of cylinders: 6
- Bore: 5.6″
- Stroke: 6.5″
- Piston displacement: 4 gal
- Engine power (manual mode):
- SAE J1995 Gross: 318 kW (426 HP) at 1,900 rpm
- ISO 14396: 318 kW (426 HP) at 1,900 rpm
- ISO 9249 (net engine power): 311 kW (417 HP) at 1,900 rpm
- Maximum torque: 1,586 ft.-lbs. (2,150 N·m) at 1,350 rpm
- Torque rise: 37%
- Fan speed: Max. 1,300 rpm
- Air cleaner: 2-stage, dry-type
- U.S. EPA Tier 4 Final emissions certified
Tandem Drive
- Oscillating welded box section: 2′ 5″ x 12″
- Side wall thickness: Inner 1″, Outer 1″
- Wheel axle spacing: 6′ 6″
Front Axle
- Type: Solid bar construction welded steel sections
- Ground clearance at pivot: 2′ 4″
- Wheel lean angle, right or left: 14°
- Oscillation, total: 32°
Rear Axle
- Alloy steel, heat treated, semi-floating axle with lock/unlock differential (auto/manual)
Transmissions and Torque Converter
- Gear Forward/Reverse:
- 1st: 3.3 mph / 5.3 km/h
- 2nd: 4.5 mph / 7.2 km/h
- 3rd: 6.3 mph / 10.2 km/h
- 4th: 8.5 mph / 13.7 km/h
- 5th: 10.4 mph / 16.8 km/h
- 6th: 14.3 mph / 23.0 km/h
- 7th: 20.2 mph / 32.5 km/h
- 8th: 27.1 mph / 43.6 km/h
Steering
- Hydraulic power steering: Provides stopped engine steering meeting ISO 5010
- Minimum turning radius: 30′ 6″
- Maximum steering range, right or left: 50°
- Articulation, right or left: 70°
Brakes
- Service brake: Foot operated, wet multiple-disc brakes, hydraulically actuated on four tandem wheels
- Parking brake: Manually actuated, spring applied on four tandem wheels, hydraulically released wet disc
Frame
- Front Frame Structure:
- Height: 1′ 8″
- Width: 1′ 7″
- Side: 1″/1.3″
- Upper, lower: 1.1″/1.3″
- Drawbar:
- A-shaped, welded construction for maximum strength with a replaceable drawbar ball
- Drawbar frame: 1′ x 1.25″
Circle
- Lubricated bearing type circle
- Diameter (outside): 6′
- Circle reversing control hydraulic rotation: 130°
Moldboard
- Hydraulic power shift fabricated from steel
- Dimensions: 18′ x 3′ 2″ x 1″
- Arc radius: 1′ 4″
- Cutting edge: 10″ x 1″
- Replaceable/Reversible side edges: 8″ x 1′ 7″ x .75″
- Blade pull: 59,119 lbf.
- Blade down pressure: 49,009 lbf.
- Blade range:
- Moldboard side shift: Right 2′ 8″, Left 3′ 1″
- Maximum shoulder reach outside rear tires (frame straight): Right 6′ 11″, Left 7″
- Maximum lift above ground: 1′ 8″
- Maximum cutting depth: 1′ 9″
- Blade tip angle: 49-degrees forward, 3-degrees backward
Hydraulics
- Load-sensing closed center hydraulics with variable displacement piston pump
- Output (at engine rated rpm): 83.3 gpm
- Maximum system pressure: 3,989 psi
Instrument
- Electric monitoring system with diagnostics
- Standard gauges:
- Articulation, engine coolant temperature, fuel level, speedometer, transmission shift indicator, engine tachometer, torque converter oil temperature, DEF level, hydraulic oil temperature, ECO gauge
Capacities (Refilling)
- Fuel tank: 189 gal
- DEF tank: 10 gal
- Cooling system: 21 gal
- Crankcase: 13 gal
- Transmission: 23 gal
- Final drive: 15 gal
- Tandem housing (each): 53 gal
- Hydraulic system: 39 gal
- Circle reverse housing: 7 gal
Operating Weight (Approximate)
Configuration 1:
- Total: 104,323 lbs.
- On front wheels: 30,424 lbs.
- On rear wheels: 73,899 lbs.
Configuration 2:
- Total: 107,079 lbs.
- On front wheels: 31,019 lbs.
- On rear wheels: 76,059 lbs.
Ripper
- Ripper shank holders: 7
- Ripping depth: 1′ 9″
- Ripper shank holder spacing: 1′ 8″
- Penetration force: 52,156 lbf.
- Pryout force: 54,404 lbf.
Further information on this machine can be viewed by visiting this link https://www.komatsu.com/products/motor-graders/gd955-7
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