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Motor grader

GD655-6

  • Horsepower 163 kW @ 2 100 rpm 218 HP @ 2,100 rpm
  • Operating weight 16 940 kg 37,346 lbs.
  • Moldboard 4 m 14 ft.

Next-level grading

Looking for smooth accuracy in an operator-friendly machine? Powered by a unique dual-mode transmission, this grader has enhanced job site visibility and offers operators an exceptional tool for achieving surface precision.

  • Exceptional visibility
  • Smooth power and optimized control
  • High flow hydraulics with on-demand CLSS valves for operator efficiency
  • Dual engine power modes for increased fuel efficiency of up to 15%*

    * compared to GD655-5

Features and benefits

Unique dual-mode powershift transmission with torque-converter

Control, finesse and traction where it is needed — at the ground. For fine finish grading at a steady speed or for precise cutting around objects, the industry exclusive, dual-mode transmission with anti-stall technology allows for steady efficiency.

Fuel efficiency power modes

Efficient operation with two selectable power settings. For fine finish grading or light-duty road maintenance, eco mode helps provide fuel efficiency, while heavy pushing or high-demand tasks are tackled in power mode.

Blade lift accumulators standard

Help protect the moldboard, drawbar and blade circle from damage with two selectable function blade accumulators. Blade lift cylinders absorb impacts if the blade edge hits an immobile object such as a manhole, boulder or railroad crossing.

Operator comfort

Long days on the job are more comfortable with the standard air suspension seat. The seat adjusts to the operator’s weight and dampens vibrations from the machine, helping to reduce fatigue.

CLSS constant implement speed multi-circuit capable hydraulics

High-performance hydraulic system provides responsive control and smooth, constant speed. The closed-center load-sensing system allows for multiple circuits to operate simultaneously, independent of engine speed.

Hexangular cab

Increase visibility with a commanding view of the job site. The hexangular, low-profile cab layout offers a wide field of vision, increasing the front and rear work equipment views.

Rearview camera

Make sure your operator can keep an eye on the surroundings. The standard rearview monitor system and dedicated display with custom settings means that the main monitor is always showing important machine information.

Hydraulic-driven cooling fan

Run the fan only when needed, for increased efficiency and power. A hydraulic cooling fan senses engine load and temperature adjusting fan speed as necessary.

Actionable insights

Keep track of your machine and its productivity with the latest Komtrax system. Receive service alerts, operating history, faults, and fuel usage reports remotely by anyone granted user access.

Specifications for GD655-6

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US system Metric
Engine
Model SAA6D107E-3*
Type Water-cooled, 4-cycle, direct injection
Aspiration Turbocharged, aftercooled, cooled EGR
Number of cylinders 6
Bore 107 mm
Stroke 124 mm
Piston displacement 6.69 L
Gross horsepower (Manual mode):
P-mode
Gear 1-3 @ 2 000 rpm 136 kW
Gear 4-6 @ 2 000 rpm 151 kW
Gear 7-8 @ 2 100 rpm 165 kW
E-mode
Gear 1-6 @ 2 000 rpm 136 kW
Gear 7-8 @ 2 000 rpm 165 kW
Net horsepower** (Manual mode):
P-mode
Gear 1-3 @ 2 000 rpm 134 kW
Gear 4-6 @ 2 000 rpm 149 kW
Gear 7-8 @ 2 100 rpm 163 kW
E-mode
Gear 1-6 @ 2 000 rpm 134 kW
Gear 7-8 @ 2 000 rpm 163 kW
Max. torque @ 1 450 rpm 941 Nm 96.0 kg-m
Torque rise 30 %
Fan speed Max. 1 450 rpm
Air cleaner 2-stage, dry-type

* EPA Tier 4 Final emissions certified.

** Net horsepower output for standard (SAE J1349) including air cleaner, alternator (not charging), water pump, lubricating oil, fuel pump, muffler and fan running at minimum speed.

Model SAA6D107E-3*
Type Water-cooled, 4-cycle, direct injection
Aspiration Turbocharged, aftercooled, cooled EGR
Number of cylinders 6
Bore 4.21 in
Stroke 4.88 in
Piston displacement 408 in3
Gross horsepower (Manual mode):
P-mode
Gear 1-3 @ 2,000 rpm 183 HP
Gear 4-6 @ 2,000 rpm 203 HP
Gear 7-8 @ 2,100 rpm 221 HP
E-mode
Gear 1-6 @ 2,000 rpm 183 HP
Gear 7-8 @ 2,000 rpm 221 HP
Net horsepower** (Manual mode):
P-mode
Gear 1-3 @ 2,000 rpm 180 HP
Gear 4-6 @ 2,000 rpm 200 HP
Gear 7-8 @ 2,100 rpm 218 HP
E-mode
Gear 1-6 @ 2,000 rpm 180 HP
Gear 7-8 @ 2,000 rpm 218 HP
Max. torque @ 1,450 rpm 694 lbs.-ft.
Torque rise 30 %
Fan speed Max. 1,450 rpm
Air cleaner 2-stage, dry-type

* EPA Tier 4 Final emissions certified.

** Net horsepower output for standard (SAE J1349) including air cleaner, alternator (not charging), water pump, lubricating oil, fuel pump, muffler and fan running at minimum speed.

Transmissions and torque converter

Full power shift transmission with integral free wheeling stator torque converter and lock-up.

Speeds (at rated engine speed)    
Gear Forward Reverse
1st 3.4 kph 4.5 kph
2nd 5.0 kph 9.2 kph
3rd 7.0 kph 20.3 kph
4th 10.2 kph 40.3 kph
5th 15.4 kph -
6th 22.3 kph -
7th 30.6 kph -
8th 44.3 kph -

Full power shift transmission with integral free wheeling stator torque converter and lock-up.

Speeds (at rated engine speed)    
Gear Forward Reverse
1st 2.1 mph 2.8 mph
2nd 3.1 mph 5.7 mph
3rd 4.3 mph 12.6 mph
4th 6.3 mph 25.0 mph
5th 9.6 mph -
6th 13.9 mph -
7th 19.0 mph -
8th 27.5 mph -
Tandem drive
Oscillating welded box section 520 x 202 mm
Side wall thickness:
Inner 22 mm
Outer 19 mm
Wheel axle spacing 1 525 mm
Tandem oscillation 11° forward
Tank 7 L
Oscillating welded box section 1 ft. 8 in x 8 in
Side wall thickness:
Inner 0.87 in
Outer 0.75 in
Wheel axle spacing 5 ft. 0 in
Tandem oscillation 13° reverse
Tank 1.8 US gal
Front axle
Type Solid bar construction welded steel sections
Ground clearance at pivot 620 mm
Wheel lean angle, right or left 16°
Oscillation, total 32°
Type Solid bar construction welded steel sections
Ground clearance at pivot 2 ft. 0 in
Wheel lean angle, right or left 16°
Oscillation, total 32°
Rear axle

Alloy steel, heat treated, full floating axle with lock/unlock differential

Alloy steel, heat treated, full floating axle with lock/unlock differential

Wheels, front and rear
Bearings Tapered roller
Tires 17.5R25
Tire rims (demountable) 13 in one-piece rims
Bearings Tapered roller
Tires 17.5R25
Tire rims (demountable) 13 in one-piece rims
Steering

Hydraulic power steering providing stopped engine steering meeting ISO 5010.

Minimum turning radius 7.4 m
Maximum steering range, right or left 49°
Articulation, right or left 25°

Hydraulic power steering providing stopped engine steering meeting ISO 5010.

Minimum turning radius 24 ft. 3 in
Maximum steering range, right or left 49°
Articulation, right or left 25°
Brakes

Service brake: Foot operated, sealed oil disc brakes, hydraulically actuated on four tandem wheels

Parking brake: Manually actuated, spring applied, hydraulically released caliper

Service brake: Foot operated, sealed oil disc brakes, hydraulically actuated on four tandem wheels

Parking brake: Manually actuated, spring applied, hydraulically released caliper

Frame
Front Frame Structure  
Height 300 mm
Width 300 mm
Upper, Lower. 25 mm
Front Frame Structure  
Height 11.8 in
Width 11.8 in
Upper, Lower. 1.0 in
Drawbar

A-shaped, u-section press formed and welded construction for maximum strength with a replaceable drawbar ball

Drawbar frame 210 x 22 mm

A-shaped, u-section press formed and welded construction for maximum strength with a replaceable drawbar ball

Drawbar frame 8.3 x 0.87 in
Circle

Single piece rolled ring forging. Six circle support shoes with replaceable wear surface. Circle teeth hardened on front 180° of circle.

Diameter (outside) 1 530 mm
Circle reversing control hydraulic rotation 360°

Single piece rolled ring forging. Six circle support shoes with replaceable wear surface. Circle teeth hardened on front 180° of circle.

Diameter (outside) 5 ft. 0 in
Circle reversing control hydraulic rotation 360°
Moldboard

Hydraulic power shift fabricated from high tensile steel. Includes replaceable metal wear inserts, cutting edge and end bits. Cutting edge and end bits are hardened.

Dimensions 4 320 x 660 x 22 mm
Arc radius 432 mm
Cutting edge 152 x 16 mm
Replaceable/Reversible side edges 156 x 16 x 456 mm
Blade pull:  
Base GVW 10 100 kg
With ripper GVW 10 980 kg
Blade down pressure:  
Base GVW 6 940 kg
With ripper GVW 8 400 kg

Hydraulic power shift fabricated from high tensile steel. Includes replaceable metal wear inserts, cutting edge and end bits. Cutting edge and end bits are hardened.

Dimensions 14 ft. x 26 in x 0.87 in
Arc radius 1 ft. 5 in
Cutting edge 6 x 0.63 in
Replaceable/Reversible side edges 6 ft. x 0.63 in x 1 ft. 6 in
Blade pull:  
Base GVW 22,267 lbs.
With ripper GVW 24,207 lbs.
Blade down pressure:  
Base GVW 15,300 lbs.
With ripper GVW 18,519 lbs.
Blade range
Moldboard side shift:  
Right 820 mm
Left 820 mm
Maximum shoulder reach outside rear tires (frame straight)  
Right 2 000 mm
Left 2 000 mm
Maximum lift above ground 480 mm
Maximum cutting depth 615 mm
Maximum blade angle, right or left 90°
Blade tip angle 40° forward, 5° backward
Moldboard side shift:  
Right 2 ft. 8 in
Left 2 ft. 8 in
Maximum shoulder reach outside rear tires (frame straight)  
Right 6 ft. 7 in
Left 6 ft. 7 in
Maximum lift above ground 1 ft. 7 in
Maximum cutting depth 2 ft. 0 in
Maximum blade angle, right or left 90°
Blade tip angle 40° forward, 5° backward
Hydraulics

Load-sensing closed center hydraulics with variable displacement piston pump. Short stroke/low effort direct acting control valves with preselected maximum flow setting to each function. Double acting anti-drift check valves on blade lift, tip, circle shift, articulation, and leaning wheels.

Output (at engine rated rpm) 200 L/min
Standby pressure 3.4 MPa 35 kg/cm2
Maximum system pressure 20.6 MPa 210 kg/cm2

Load-sensing closed center hydraulics with variable displacement piston pump. Short stroke/low effort direct acting control valves with preselected maximum flow setting to each function. Double acting anti-drift check valves on blade lift, tip, circle shift, articulation, and leaning wheels.

Output (at engine rated rpm) 52.8 gpm
Standby pressure 500 psi
Maximum system pressure 3,000 psi
Instrument

Electric monitoring system with diagnostics:

Gauges:
Standard - articulation, engine coolant temperature, fuel level, speed meter, transmission shift indicator, engine tachometer, torque converter oil temperature

Warning lights / Indicator:
Standard - battery charge, brake oil pressure, blade float, brake oil pressure, inching temperature, directional indicator, engine oil pressure, hydraulic oil temperature, heater signal, lift arm lock, parking brake, differential lock, torque converter oil, temperature, ecology, P mode, fan reverse, rpm set, high beam, working lights

Electric monitoring system with diagnostics:

Gauges:
Standard - articulation, engine coolant temperature, fuel level, speed meter, transmission shift indicator, engine tachometer, torque converter oil temperature

Warning lights / Indicator:
Standard - battery charge, brake oil pressure, blade float, brake oil pressure, inching temperature, directional indicator, engine oil pressure, hydraulic oil temperature, heater signal, lift arm lock, parking brake, differential lock, torque converter oil, temperature, ecology, P mode, fan reverse, rpm set, high beam, working lights

Capacities (refilling)
Fuel tank 390 L
Cooling system 30 L
Crank case 23 L
Transmission 45 L
Final drive 17 L
Tandem housing (each) 57 L
Hydraulic system 69 L
Circle reverse housing 7 L
Fuel tank 103 US gal
Cooling system 7.9 US gal
Crank case 6.1 US gal
Transmission 11.9 US gal
Final drive 4.5 US gal
Tandem housing (each) 15.1 US gal
Hydraulic system 18.2 US gal
Circle reverse housing 1.8 US gal
Operating weight (approximate)
Includes lubricants, coolant, full fuel tank  
Total 16 940 kg
On rear wheels 12 620 kg
On front wheels 4 320 kg
With rear mounted ripper and front push plate:  
Total 18 900 kg
On rear wheels 13 820 kg
On front wheels 5 070 kg
With mid-mounted scarifier:  
Total 17 480 kg
On rear wheels 12 600 kg
On front wheels 4 870 kg
Includes lubricants, coolant, full fuel tank  
Total 37,346 lbs.
On rear wheels 27,822 lbs.
On front wheels 9,524 lbs.
With rear mounted ripper and front push plate:  
Total 41,667 lbs.
On rear wheels 30,468 lbs.
On front wheels 11,177 lbs.
With mid-mounted scarifier:  
Total 38,537 lbs.
On rear wheels 27,778 lbs.
On front wheels 10,737 lbs.
Ripper
Ripping depth, maximum 425 mm
Ripper shank holders 5
Ripper shank holder spacing 534 mm
Penetration force 9 390 kg
Pryout force 17 600 kg
Machine length increase, beam raised 690 mm
Ripping depth, maximum 1 ft. 5 in
Ripper shank holders 5
Ripper shank holder spacing 1 ft. 9 in
Penetration force 20,701 lbs.
Pryout force 38,801 lbs.
Machine length increase, beam raised 2 ft. 5 in
Scarifier
Middle, V-type:  
Working width 1 430 mm
Scarifying depth, maximum 190 mm
Scarifier shank holders 11
Scarifier shank holders spacing 138 mm
Rear:  
Working width 2 186 mm
Scarifying depth, maximum 165 mm
Scarifier shank holders 9
Scarifier shank holders spacing 267 mm
Middle, V-type:  
Working width 4 ft. 8 in
Scarifying depth, maximum 7.5 in
Scarifier shank holders 11
Scarifier shank holders spacing 5.4 in
Rear:  
Working width 7 ft. 2 in
Scarifying depth, maximum 6.5 in
Scarifier shank holders 9
Scarifier shank holders spacing 10.5 in

Engine and its related items:

  • Accelerator and electric throttle control
  • Air cleaner, double element with dust indicator
  • Air intake extension
  • Antifreeze -22 F(-30C)
  • Auto-idle Shutdown
  • Hydraulic driven, reversing, cooling fan, blower type, plastic blade, with fan guard
  • Engine, Komatsu SAA6D107E-3, 145 to 218 VHP EPA Tier 4 Final certified, turbocharged and air-air after cooled
  • Fuel line pre-filter
  • KDPF - After-Treatment Assembly Consisting of KDOC and KCSF
  • Secondary Engine Shutdown Switch
  • Selective Catalytic Reduction (SCR) System

Electrical system:

  • Alarm, backup
  • Alternator, 140 Ampere, (24V)
  • Batteries, Extreme duty, 2 x 12V, 1146 cca each
  • Battery, disconnect switch
  • Dome light cab
  • Headlights,(2) halogen type, front bar mounted
  • Horn, electric
  • Indicator lights:
    - Battery charge
    - Blade float
    - Brake oil pressure
    - Cooling fan reverse mod
    - Differential lock
    - Differential oil temperatur
    - Dual power mode, economy and power
    - Engine oil pressure
    - Engine RPM set
    - Lift arm lock
    - Lights, high beam
    - Parking break
    - Transmission system electrical circuit
  • Lights, backup, stop, directional
  • Starter 5.5kW
  • Working light, front(4) and rear(2)
  • Working light ,(4)cab mounted flood type

Operator environment:

  • 12V (10A) power port
  • Air conditioner (R134a) with heater
  • AM/FM radio
  • Cab: low profile with ROPS/FOPS Level II (SAE J1040, J2311)
  • Console, adjustable with instrument panel monitoring system
  • Electric defroster rear window
  • Mirrors: interior cab, right and left exterior mirrors
  • Electric defroster rear window
  • Mirrors: interior cab, right and left exterior mirrors
  • Multi-monitor with 7" LCD Display
  • Rearview Camera and Monitor
  • Sound suppression,74 Dba at operators ear with floor mat with tinted windows, front, rear and door intermittent wiper/washers

Power Train

  • Dual mode transmission (8F-4R) power shift direct drive and torque converter with auto shift
  • Axle, rear full floating, planetary type reduction
  • Service brakes, fully hydraulic wet disc
  • Parking brake, spring apply, hydraulic release dry disc
  • Differential, manual lock/unlock
  • Tires and rims: 17.5R25 radials on one-piece 13" rims (6)

Work Equipment and Hydraulics

  • Blade accumulators
  • Blade lift float, detent type, LH and RH
  • Circle, drawbar mounted, 360° rotation with blade lift and circle side shift with anti-drift check valves
  • Circle slip clutch
  • Greaseless circle wear plates
  • Hydraulic control valve, 10 valve section with control levers
  • Hydraulic system, closed center, load sensing
  • Steering, full hydraulic with tilt steering wheel plus leaning front wheels and frame articulation with anti-drift check valves

Other Standard Equipment

  • Komtrax - Level 5
  • Precleaner, Turbo II
  • Provision for Grade Control, TOPCON
  • Rear hitch
  • Ripper, provision for battery cover and engine side covers
  • Steps and handrails, right, left and rear
  • Toolbox with lock
  • Vandalism protection, lockable fuel tank, hydraulic tank

Engine and its related items:

  • Accelerator and electric throttle control
  • Air cleaner, double element with dust indicator
  • Air intake extension
  • Antifreeze -22 F(-30C)
  • Auto-idle Shutdown
  • Hydraulic driven, reversing, cooling fan, blower type, plastic blade, with fan guard
  • Engine, Komatsu SAA6D107E-3, 145 to 218 VHP EPA Tier 4 Final certified, turbocharged and air-air after cooled
  • Fuel line pre-filter
  • KDPF - After-Treatment Assembly Consisting of KDOC and KCSF
  • Secondary Engine Shutdown Switch
  • Selective Catalytic Reduction (SCR) System

Electrical system:

  • Alarm, backup
  • Alternator, 140 Ampere, (24V)
  • Batteries, Extreme duty, 2 x 12V, 1146 cca each
  • Battery, disconnect switch
  • Dome light cab
  • Headlights,(2) halogen type, front bar mounted
  • Horn, electric
  • Indicator lights:
    - Battery charge
    - Blade float
    - Brake oil pressure
    - Cooling fan reverse mod
    - Differential lock
    - Differential oil temperatur
    - Dual power mode, economy and power
    - Engine oil pressure
    - Engine RPM set
    - Lift arm lock
    - Lights, high beam
    - Parking break
    - Transmission system electrical circuit
  • Lights, backup, stop, directional
  • Starter 5.5kW
  • Working light, front(4) and rear(2)
  • Working light ,(4)cab mounted flood type

Operator environment:

  • 12V (10A) power port
  • Air conditioner (R134a) with heater
  • AM/FM radio
  • Cab: low profile with ROPS/FOPS Level II (SAE J1040, J2311)
  • Console, adjustable with instrument panel monitoring system
  • Electric defroster rear window
  • Mirrors: interior cab, right and left exterior mirrors
  • Electric defroster rear window
  • Mirrors: interior cab, right and left exterior mirrors
  • Multi-monitor with 7" LCD Display
  • Rearview Camera and Monitor
  • Sound suppression,74 Dba at operators ear with floor mat with tinted windows, front, rear and door intermittent wiper/washers

Power Train

  • Dual mode transmission (8F-4R) power shift direct drive and torque converter with auto shift
  • Axle, rear full floating, planetary type reduction
  • Service brakes, fully hydraulic wet disc
  • Parking brake, spring apply, hydraulic release dry disc
  • Differential, manual lock/unlock
  • Tires and rims: 17.5R25 radials on one-piece 13" rims (6)

Work Equipment and Hydraulics

  • Blade accumulators
  • Blade lift float, detent type, LH and RH
  • Circle, drawbar mounted, 360° rotation with blade lift and circle side shift with anti-drift check valves
  • Circle slip clutch
  • Greaseless circle wear plates
  • Hydraulic control valve, 10 valve section with control levers
  • Hydraulic system, closed center, load sensing
  • Steering, full hydraulic with tilt steering wheel plus leaning front wheels and frame articulation with anti-drift check valves

Other Standard Equipment

  • Komtrax - Level 5
  • Precleaner, Turbo II
  • Provision for Grade Control, TOPCON
  • Rear hitch
  • Ripper, provision for battery cover and engine side covers
  • Steps and handrails, right, left and rear
  • Toolbox with lock
  • Vandalism protection, lockable fuel tank, hydraulic tank
  • Moldboard:
    -- 3710 mm x 660 mm x 22 mm with replaceable end bits
    -- 152 mm x 16 mm throughhardened cutting edges  and 5/8" hardware
  • Pusher plate (for use with rear mounted ripper/scarifier assembly)
  • Rear-mounted ripper/scarifier assembly includes (3) shanks or (9) scarifier shanks can be inserted into the available slots
  • Mid-mounted scarifier assembly (includes 11 shanks and replaceable points)
  • Amber colored warning light
  • 610 mm 2' LH/RH moldboard extensions
  • Kit provision for a single function front attachment
  • Moldboard:
    -- 12' x 26" x 0.87" with replaceable end bits
    -- 6" x 0.63" throughhardened cutting edges  and 5/8" hardware
  • Pusher plate (for use with rear mounted ripper/scarifier assembly)
  • Rear-mounted ripper/scarifier assembly includes (3) shanks or (9) scarifier shanks can be inserted into the available slots
  • Mid-mounted scarifier assembly (includes 11 shanks and replaceable points)
  • Amber colored warning light
  • 610 mm 2' LH/RH moldboard extensions
  • Kit provision for a single function front attachment
Support you can count on

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