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Komatsu GD655-7 MOTOR GRADER

Horsepower	218 @2100 rpm
Moldboard	14'
OperatingWeight	38,140 lb
BucketCapacity

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Feature Parameter

New Cab Enhancements

Slightly smaller but “right sized” steering wheel provides more visibility and operator room in the cab, convenient for those long, “blade-up and roading” trips
New steering lever allows the operator to keep hands on the low-effort, work equipment levers and make small steering adjustments, while operating without needing to turn the steering wheel
New multi-position adjustable arm rests and LH/RH consoles have power raise/lower and mechanical fore/aft adjustments to precisely adjust to operator preferences.
New, high-capacity, air-suspension seat softens in-cab machine vibrations for operator
New stop-at-center articulation feature simplifies operation
New operator presence monitoring system alerts the operator if they leave the seat and controls are not locked out properly

Under The Hood

A powerful 218 HP (163 kW), EPA Tier 4 Final certified, SAA6D107E-3 engine
2-mode, 3-stage Variable Horsepower Control (VHPC) allows the selection of the appropriate mode, economy or power, to match operating parameters to application requirements for optimal fuel savings
Komatsu Diesel Particulate Filter (KDPF) and other after treatment components are designed in conjunction with the engine for efficiency and long life
More than 98 percent of KDPF regeneration is performed passively, with no action required of the operator and no interference with machine operation

Power Train Performance

New transmission shift lever with finger-operated forward-neutral-reverse switch simplifies operation and dramatically reduces required hand movement
Komatsu power shift transmission designed and built specifically for Komatsu graders provides on-the-go, full power shifting, as well as inching capability and automatic shifting in the higher ranges
Industry exclusive, dual-mode transmission (8 forward, 4 reverse) allows operators to benefit from the high travel speeds and reduced fuel consumption of a direct drive, as well as the increased tractive effort and control of a torque converter
An inching pedal gives the operator precise control of machine movement
Full locking differential provides the traction required in the most severe operating conditions

Other Standard Value Features Included

Grade control, TOPCON 3DMC plug-and-play ready, with no aftermarket valve required
Two, five-section hydraulic control valves are standard enabling the addition of attachments and is strategically located to improve forward visibility
Closed-center Load Sensing (CLSS) hydraulic system, with variable displacement pump, supplies flow and pressure only when required, resulting in less heat and lower fuel consumption
Blade lift accumulators absorb shocks when the moldboard hits immovable objects
Circle slip clutch, for accidental contact with hidden objects with the moldboard
Greaseless circle wear plates for long life
Independent blade lift float
AM/FM radio with auxiliary input jack and two 12-volt ports
Seven-inch, full color, high resolution monitor with Ecology Guidance
Separate, full color, rearview monitoring system
Pioneering KOMTRAX telematics system and monitor, providing machine metrics, including KDPF status and DEF-level data, fuel consumption, plus performance information collected and sorted by operator ID
Komatsu Auto Idle Shutdown to reduce idle time and save fuel

Serviceability / Komatsu CARE

Reversible, variable speed hydraulic fan to blow out dust accumulation in the cooler
Completely sealed and adjustment-free hydraulically actuated, wet, disc brakes
Ground level access to fuel and DEF fill
Easily accessible engine and hydraulic oil, and coolant drains
All Komatsu GD655-7 units come with Komatsu CARE. Komatsu CARE provides scheduled factory maintenance for the first 2,000 hours or three years including a 50-point inspection at each service, and two complimentary KDPF exchanges in the first five years.

Specifications

Engine

Model		SAA6D107E-3*
Type		Water-cooled, 4-cycle, direct injection
Aspiration		Turbocharged, aftercooled, cooled EGR
Number of cylinders		6
Bore	107 mm	4.21"
Stroke	124 mm	4.88"
Piston displacement	6.69 ltr	408 in³
Gross horsepower (Manual mode):
P-mode
Gear 1-3 @2000 rpm	136 kW	183 HP
Gear 4-6 @2000 rpm	151 kW	203 HP
Gear 7-8 @2100 rpm	165 kW	221 HP
E-mode
Gear 1-6 @2000 rpm	136 kW	183 HP
Gear 7-8 @2000 rpm	165 kW	221 HP
Net horsepower (Manual mode)**
P-mode
Gear 1-3 @2000 rpm	134 kW	180 HP
Gear 4-6 @2000 rpm	149 kW	200 HP
Gear 7-8 @2100 rpm	163 kW	218 HP
E-mode
Gear 1-6 @2000 rpm	134 kW	180 HP
Gear 7-8 @2000 rpm	163 kW	218 HP
Max. torque @1450 rpm	941 Nm 96.0 kg•m	694 lb.ft.
Torque rise		30 %
Fan speed		Max. 1450 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.

Tandem Drive

Oscillating welded box section	520 mm x 202 mm	1'8" x 8"
Side wall thickness:
Inner	22 mm	0.87"
Outer	19 mm	0.75"
Wheel axle spacing	1525 mm	5'0"
Tandem oscillation	11° forward	13° reverse
Tank	7 L	1.8 U.S. gal

Front Axle

Type		Solid bar construction welded steel sections
Ground clearance at pivot	620 mm	2'0"
Wheel lean angle, right or left		16°
Oscillation, total		32°

Rear Axle

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" one-piece rims

Steering

Hydraulic power steering providing stopped engine steering meeting ISO 5010.
Minimum turning radius	7.4 m	24'3"
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.

Frame

Front Frame Structure
Height	300 mm	11.8"
Width	300 mm	11.8"
Upper, Lower	25 mm	1.0"

Drawbar

A-shaped, u-section press formed and welded construction for maximum strength with a replaceable drawbar ball.
Drawbar frame	210 x 22 mm	8.3" x 0.87"

Circle

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

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.

Blade Range

Moldboard side shift:
Right	820 mm	2'8"
Left	820 mm	2'8"
Maximum shoulder reach outside rear tires (frame straight)
Right	2000 mm	6'7"
Left	2000 mm	6'7"
Maximum lift above ground	480 mm	1'7"
Maximum cutting depth	615 mm	2'0"
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. Electronic proportional controlled 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.

Parameter

Model		SAA6D107E-3*
Type		Water-cooled, 4-cycle, direct injection
Aspiration		Turbocharged, aftercooled, cooled EGR
Number of cylinders		6
Bore	107 mm	4.21"
Stroke	124 mm	4.88"
Piston displacement	6.69 ltr	408 in³
Gross horsepower (Manual mode):
P-mode
Gear 1-3 @2000 rpm	136 kW	183 HP
Gear 4-6 @2000 rpm	151 kW	203 HP
Gear 7-8 @2100 rpm	165 kW	221 HP
E-mode
Gear 1-6 @2000 rpm	136 kW	183 HP
Gear 7-8 @2000 rpm	165 kW	221 HP
Net horsepower (Manual mode)**
P-mode
Gear 1-3 @2000 rpm	134 kW	180 HP
Gear 4-6 @2000 rpm	149 kW	200 HP
Gear 7-8 @2100 rpm	163 kW	218 HP
E-mode
Gear 1-6 @2000 rpm	134 kW	180 HP
Gear 7-8 @2000 rpm	163 kW	218 HP
Max. torque @1450 rpm	941 Nm 96.0 kg•m	694 lb.ft.
Torque rise		30 %
Fan speed		Max. 1450 rpm
Air cleaner		2-stage, dry-type

Speeds (at rated engine speed)
Gear	Forward	Reverse
1st	3.4 km/h 2.1 mph	4.5 km/h 2.8 mph
2nd	5.0 km/h 3.1 mph	9.2 km/h 5.7 mph
3rd	7.0 km/h 4.3 mph	20.3 km/h 12.6 mph
4th	10.2 km/h 6.3 mph	40.3 km/h 25.0 mph
5th	15.4 km/h 9.6 mph	-
6th	22.3 km 13.9 mph	-
7th	30.6 km/h 19.0 mph	-
8th	44.3 km/h 27.5 mph	-

Oscillating welded box section	520 mm x 202 mm	1'8" x 8"
Side wall thickness:
Inner	22 mm	0.87"
Outer	19 mm	0.75"
Wheel axle spacing	1525 mm	5'0"
Tandem oscillation	11° forward	13° reverse
Tank	7 L	1.8 U.S. gal

Type		Solid bar construction welded steel sections
Ground clearance at pivot	620 mm	2'0"
Wheel lean angle, right or left		16°
Oscillation, total		32°

Bearings	Tapered roller
Tires	17.5R25
Tire rims (demountable)	13" one-piece rims

Hydraulic power steering providing stopped engine steering meeting ISO 5010.
Minimum turning radius	7.4 m	24'3"
Maximum steering range, right or left		49°
Articulation, right or left		25°

Service brake	Foot operated, sealed oil disc brakes, hydraulically actuated on four tandem wheels.
Parking brake	Manually actuated, spring applied, hydraulically released caliper.

Front Frame Structure
Height	300 mm	11.8"
Width	300 mm	11.8"
Upper, Lower	25 mm	1.0"

A-shaped, u-section press formed and welded construction for maximum strength with a replaceable drawbar ball.
Drawbar frame	210 x 22 mm	8.3" x 0.87"

Diameter (outside)	1530 mm	5'0"
Circle reversing control hydraulic rotation		360°

Dimensions	4320 x 660 x 22 mm	14' x 26" x 0.87"
Arc radius	432 mm	1'5"
Cutting edge	152 x 16 mm	6" x 0.63"
Replaceable/Reversible side edges	156 x 16 x 456 mm	6' x 0.63" x 1'6"
Blade pull:
Base GVW	10100 kg	22,267 lbs
With ripper GVW	10980 kg	24,207 lbs
Blade down pressure:
Base GVW	6940 kg	15,300 lbs
With ripper GVW	8400 kg	18,519 lbs

Moldboard side shift:
Right	820 mm	2'8"
Left	820 mm	2'8"
Maximum shoulder reach outside rear tires (frame straight)
Right	2000 mm	6'7"
Left	2000 mm	6'7"
Maximum lift above ground	480 mm	1'7"
Maximum cutting depth	615 mm	2'0"
Maximum blade angle, right or left		90°
Blade tip angle	40° forward	5° backward

Output (at engine rated rpm)	200 L/min	52.8 u.s.gal/min
Standby pressure	3.4 MPa 35 kg/cm²	500 psi
Maximum system pressure	20.6 MPa 210 kg/cm²	3,000 psi

Fuel tank	390 ltr	103 u.s. gal
Cooling system	30 ltr	7.9 u.s. gal
Crank case	23 ltr	6.1 u.s. gal
Transmission	45 ltr	11.9 u.s. gal
Final drive	17 ltr	4.5 u.s. gal
Tandem housing (each)	57 lt	15.1 u.s. gal
Hydraulic system	69 ltr	18.2 u.s. gal
Circle reverse housing	7 ltr	1.8 u.s. gal

Includes lubricants, coolant, full fuel tank
Total	17300 kg	38,140 lbs
With rear mounted ripper and front push plate:
Total	19260 kg	41,667 lbs

Ripping depth, maximum	425 mm	1'5"
Ripper shank holders		5
Ripper shank holder spacing	534 mm	1'9"
Penetration force	9390 kg	20,701 lbs
Pryout force	17600 kg	38,801 lbs
Machine length increase,beam raised	690 mm	2'5"

Middle, V-type:
Working width	1430 mm	4'8"
Scarifying depth, maximum	190 mm	7.5"
Scarifier shank holders		11
Scarifier shank holders spacing	138 mm	5.4"
Rear:
Working width	2186 mm	7'2"
Scarifying depth, maximum	165 mm	6.5"
Scarifier shank holders		9
Scarifier shank holders spacing	267 mm	10.5"