GD655-7 Motor Graders

SPECIFICATIONS

Engine

Model	SAA6D107E-3*
Type	Water-cooled, 4-cycle, direct injection
Aspiration	Turbocharged, aftercooled, cooled EGR
No. Cylinders	6
Bore	107mm
Stroke	124mm
Piston Displacement	6.69 ltr
Horsepower, Gross	165 kW / 221 HP
Horsepower, Net	163 kW / 218 HP
GROSS HORSEPOWER (MANUAL MODE):
P-mode
Gear 1-3 @ 2000 rpm	137 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	137 kW / 183 HP
Gear 7-8 @ 2000 rpm	165 kW / 221 HP
NET HORSEPOWER (MANUAL MODE):
P-mode
Gear 1-3 @ 2000 rpm	135 kW / 180 HP
Gear 4-6 @ 2000 rpm	150 kW / 200 HP
Gear 7-8 @ 2100 rpm	163 kW / 218 HP
E-mode
Gear 1-6 @ 2000 rpm	135 kW / 180 HP
Gear 7-8 @ 2000 rpm	163 kW 218 HP
Rated RPM	1450 rpm
Fan Speed	max 1450 rpm
Emissions Certification	EPA Tier 4 Final

Blade Range

MOLDBOARD SIDE SHIFT:
Right	820 mm
Left	820 mm
MAXIMUM SHOULDER REACH OUTSIDE REAR TYRES (FRAME STRAIGHT):
Right	2000 mm
Left	2000 mm
Maximum lift above ground	480 mm
Maximum cutting depth	615 mm
Maximum blade angle, right or left	90 degrees
Blade tip angle	40° forward / 5° backward

Brakes

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

Capacities (Refilling)

Fuel tank	390 ltr
DEF tank	37 ltr
Cooling system	30 ltr
Crank case	23 ltr
Transmission	45 ltr
Final drive	17 ltr
Tandem housing (each)	57 ltr
Hydraulic system	69 ltr
Circle reverse housing	7 ltr

Circle

Single piece rolled ring forging. Six circle support shoes with replaceable wear surface. Circle teeth hardened on front 180° of circle.
Diametre (outside)	1530 mm
Circle reversing control hydraulic rotation	360°

Drawbar

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

Drawbar frame 210 x 22 mm
Frame

FRONT FRAME STRUCTURE

Height 300 mm

Width 300 mm

Side 16 / 32mm

Upper, Lower 25 mm
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°

Hydraulic System

Load-sending closed centre 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

Instrumentation

ELECTRIC MONITORING SYSTEM WITH DIAGNOSTICS
Gauges / Standard	Articulation, engine coolant temperature, fuel level, speed meter, transmission shift indicator, engine tachometre, torque converter oil temperature.
Warning lights / Indicator	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.

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	4320 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	10100 kg
With ripper GVW	10980 kg
BLADE DOWN PRESSURE:
Base GVW	6940 kg
With ripper GVW	8400 kg

Operating Weight

Includes lubricants, coolant, full fuel tank
Total	19260 kg
On rear wheels	13825 kg
On front Wheels	5435 kg
WITH REAR MOUNTED RIPPER AND FRONT PUSH PLATE:
Total	18900 kg
On rear wheels	13820 kg
On front wheels	5070 kg
WITH MID-MOUNTED SCARIFIER:
Total	17480 kg
On rear wheels	12600 kg
On front wheels	4870 kg

Rear Axle

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

Ripper

Maximum ripping depth	425 mm
Riper shank holders	5
Ripper shank holder spacing	534 mm
Penetration force	9390 kg
Pryout force	17600 kg
Machine length increase, beam raised	690 mm

Scarifier

MIDDLE, V-TYPE:
Working width	1430 mm
Maximum scarifying depth	190 mm
Scarifier shank holders	11
Scarifier shank holders spacing	138 mm
REAR:
Working width	2186 mm
Maximum scarifying depth	165 mm
Scarifier shank holders	9
Scarifier shank holders spacing	267 mm

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°

Tandem Drive

Oscillating welded box section	520 mm x 202 mm
SIDE WALL THICKNESS:
Inner	22 mm
Outer	19 mm
Wheel axle spacing	1525 mm
Tandem oscillation	11° forward, 13° reverse
Tank	7 L

Transmissions & 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 km/h	4.5 km/h
2nd	5.0 km/h	9.2 km/h
3rd	7.0 km/h	20.3 km/h
4th	10.2 km/h	40.3 km/h
5th	15.4 km/h
6th	22.3 km/h
7th	30.6 km/h
8th	44.3 km/h

Wheels, Front and Rear

Bearings Tapered roller

Tyres 17.5xR25, Tubeless

Tyre rims (demountable) 14" three-piece rims

Komatsu’s GD655-7 grader includes technology innovations so it’s easier and safer to use, as well as more productive. With a Komatsu SAA6D107E-3 Tier 4 Final engine, rated at 163-165 kW, operating weight is 20.2 tonnes. Technology innovations include updates to the transmission and control improvements. Plus, it’s factory-fitted for “plug-and-play” use of a 3D machine control system from leading third-party suppliers. As with all our graders, key components are designed and manufactured by Komatsu to work together in an integrated package. And it comes standard with our Komtrax remote monitoring and location system, backed by our Australia-wide service and support network.

Tier 4 Engine KDPF Regeneration

163 kW / 218 HP
ENGINE POWER
20,200 kg
OPERATING WEIGHT
4.3 mm
BLADE WIDTH