GD655-7
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Catalog excerpts

GD655-7 - 1

GD655-7 Tier 4 Final Engine Motor Grader Photos may include optional equipment. operating weight BLADE LENGTH

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GD655-7 - 2

Photos may include optional equipment. operating weight BLADE LENGTH

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GD655-7 - 3

KOMATSU CARE. Performance Features • Dual mode transmission takes advantage of the torque multiplication and inching characteristics of a torque converter as well as the low fuel consumption and increased travel speed of a direct drive. • Automatic engine stall prevention disengages direct drive and utilizes a torque converter preventing engine stall • Economy and Power engine modes • Spring applied, hydraulic-release parking brake with larger caliper diameter for increased capacity • Long wheelbase optimizes fine grading performance and body stability while maintaining a 24.2 ft turning...

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GD655-7 - 4

PERFORMANCE FEATURES KOMATSU NEW ENGINE TECHNOLOGIES Tier 4 Final Engine The Komatsu SAA6D107E-3 engine is EPA Tier 4 Final KCCV emissions certified and provides exceptional performance while reducing fuel consumption. Based on Komatsu proprietary technologies developed over many years, this diesel engine reduces nitrogen oxides (NOx) compared to the previous model. Technologies Applied to New Engine Heavy-duty aftertreatment system This new system combines a Komatsu Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR). The SCR NOx reduction system injects the correct...

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GD655-7 - 5

reduction (P mode) reduction (E mode) Higher Productivity & Lower Fuel Consumption A new variable displacement piston pump, improvements in the transmission and driveline components, and a sophisticated electronic control system for the engine and transmission all combine to achieve optimum and efficient operation. The new GD655-7 will consume up to 15% less fuel than the GD655-5. (The GD655-7 uses the same engine as the GD655-6) Fuel consumption Hydraulically Driven Cooling Fan The engine cooling fan rotation speed is electronically controlled. This system increases fuel efficiency,...

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GD655-7 - 6

Komatsu Dual-mode Transmission The dual-mode transmission is built specifically for Komatsu motor graders. The transmission provides full power shifting as well as inching capabilities and smooth automatic shifting in the higher ranges. Transmission Mode Selection • Manual Mode Transmission functions as a conventional direct drive with 8 forward speeds. Operators will benefit from consistent machine speed and reduced fuel consumption. When the control system senses an increase in load and determines that the engine is at risk of a stall condition, the direct drive clutch is automatically...

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GD655-7 - 7

ADVANCED CONTROL FEATURES Closed-center Load Sensing System (CLSS) New Electronic Proportional Control Valves The variable displacement pump idles at low output. When it senses a load requirement, the pump supplies flow and pressure quickly to match the demand. The result is less hydraulic system heat, quick response and lower fuel consumption. The bottom line is greater efficiency with this Closed-center Load Sensing System (CLSS). Designed and built by Komatsu specifically for motor graders, the valves are direct acting and provide outstanding operator "feel" and predictable system...

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GD655-7 - 8

OPERATOR ENVIRONMENT Less Effort The new control system reduces operator arm movement, and relieves stress during operation. Movement of arm Stress during operation Typical test data at Komatsu test center Fingertip Control New Steering Wheel and Steering Lever Short lever throws and low effort in both directions allows the operator to use multiple controls with one hand. By moving the control console forward and backward, entry and exit from the cab becomes easy. The steering wheel also tilts to the operators preference. Excellent Rear Visibility Excellent visibility from the hexangular...

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GD655-7 - 9

STANDARD FEATURES Provisions for Auxiliary Hydraulic Circuit This includes the control lever, valve section, and plumbing of hoses routed to the rear of the machine. If a customer decides at any point to install a ripper, this can be accomplished with an easy field install. Rippers are also available factory installed on the machine. Secondary Shut Down Switch Ground level access to the secondary shut down switch on left hand side of machine when door is open. Blade Lift-Circuit Accumulators Pressurized hydraulic accumulators to help absorb impacts for high speed operation with lockable...

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GD655-7 - 10

STANDARD FEATURES ROPS/FOPS Cab The low profile, enclosed cab offers a wide field of vision and roomy interior to reduce operator fatigue. The cab is ROPS/ FOPS Level II (ISO 3471/ISO 3449) certified. Seat Belt Warning Indicator A warning indicator on the monitor appears when the seat belt is not fastened. New Suspension Seat The air suspension, fabric covered seat which is adjustable to the operator's weight is provided as standard. The suspension seat dampens vibrations transmitted from the machine and reduces operator fatigue. Electric Throttle Control An RPM set switch allows the...

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GD655-7 - 11

MAINTENANCE & DURABILITY FEATURES Easy Access to Service Areas • Large hinged lockable doors are standard and provide easy access to the engine and radiator service points. Spin-on filters can be changed quickly. • Circuits and fuse sizes are clearly identified in the fuse panel located in the cab. Battery Location The battery box has been relocated to minimize dust accumulation. Metal Backed, Rubber Isolated Hose Clamps Hydraulic hoses are routed and secured with metal backed, rubber isolating clamps to prevent vibrations, chafing, and damage. • The tandem oil check point is conveniently...

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GD655-7 - 12

KOMATSU PARTS & KOMATSUSERVICE SUPPORT KOMATSU CARE Program Includes: *The GD655-7 comes standard with complimentary factory scheduled maintenance for the first 3 Years or 2,000 Hours, whichever occurs first. Planned Maintenance Intervals at: 500/1000/1500/2000 hour intervals. (250 hr. initial interval for some products) Complimentary Maintenance Interval includes: Replacement of Oils & Fluid Filters with genuine Komatsu Parts, 50-Point inspection, Komatsu Oil & Wear Analysis Sampling (KOWA) / Travel & Mileage (distance set by distributor; additional charges may apply) Benefits of Using...

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