Komatsu America Corp.

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Engine
Transmission and Torque Converter
Brakes
Hydraulics
Moldboard
Blade Range
Circle
Drawbar
Frame
Front Axle
Rear Axle
Tandem Drive
Steering
Wheels, Front and Rear
Operator's Compartment
Capacities
Operating Weight (approximate)
Instrument

Model GD555-3		Komatsu SA6D102E
Type		Water-cooled, 4-cycle, direct injection
Aspiration		Turbocharged and aftercooled
Number of cylinders		6
Bore	4.02''	102 mm
Stroke	4.72''	120 mm
Piston displacement	359 in³	5.88 ltr
Gross horsepower @ 2000 rpm*:
GD555-3	145 HP	108 kW
GD555-3 VHP	165 HP	125 kW
Net flywheel horsepower @ 2000 rpm**:
GD555-3	140 HP	104 kW
GD555-3 VHP	160 HP	119 kW
Peak torque @ 1400 rpm:
GD555-3	478 ft/lb	648 Nm
GD555-3 VHP	539 ft/lb	741 Nm
Torque rise		30%
Fan		7 blade, pusher
Air cleaner		2-stage, dry-type
Electrical		24 volt with 50 amp alternator
Battery		Two (2), low maintenance plus, 12 volt, 750 cca each
*Gross HP output for complete engine operating under SAE J1995 conditions.
**Net flywheel HP output for standard SAE J1349 including air cleaner, alternator (not charging), water pump, lubricating oil, fuel pump, muffler, and fan.

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 / 3.3 km/h	2.7 mph / 4.4 km/h
2nd	3.0 mph / 4.8 km/h	5.5 mph / 8.9 km/h
3rd	4.2 mph / 6.8 km/h	12.2 mph / 19.6 km/h
4th	6.1 mph / 9.8 km/h	24.2 mph / 39.0 km/h
5th	9.3 mph / 14.9 km/h	-
6th	13.4 mph / 21.6 km/h	-
7th	18.4 mph / 29.6 km/h	-
8th	26.7 mph / 42.9 km/h	-

Service brake: Foot operated, sealed oil disc brakes, hydraulically actuated on four tandem wheels, 4,268 in² 26676 cm² total braking surface

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, tilt, circle shift, articulation, and leaning wheels.

Output @ 2100 rpm	56 U.S. gal	211 ltr/min
Standby pressure	500 psi	35 kg/cm²
Maximum system pressure	3,000 psi	210 kg/cm²

Hydraulic power shift fabricated from high carbon steel. Includes replaceable metal wear inserts, cutting edge, and end bits. Cutting edge is through-hardened.

Dimensions	12' x 24'' x 0.87''	3658 mm x 610 mm x 22 mm
Arc radius	17''	432 mm
Cutting edge	6'' x 0.63''	152 mm x 16 mm
Replaceable/reversible end bits	6'' x 0.63''	152 mm x 16 mm

Circle center shift:
Right	24.4''	620 mm
Left	24.4''	620 mm
Moldboard side shift:
Right	32.3''	820 mm
Left	32.3''	820 mm
Maximum shoulder reach outside rear tires (frame straight):
Right	78.7''	2000 mm
Left	78.7''	2000 mm
Maximum lift above ground	19.1''	485 mm
Maximum cutting depth	32.9''	835 mm
Maximum blade angle, right or left		90°
Blade tip angle		40° forward, 5° backward

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

Diameter (outside)	60.2''	1530 mm
Circle reversing control hydraulic rotation		360°

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

Drawbar frame

8.3'' x 0.63''

210 mm x 16 mm

Section, welded unit (w x h)	12'' x 11.6''	305 mm x 294 mm
Side plate	9.8'' x 0.47''	250 mm x 12 mm
Vertical section module, front frame:
Minimum	116 in³	1905 cm³
Maximum	256 in³	4189 cm³
Linear weight per length, front frame:
Minimum	102 lb/ft	152 kg/m
Maximum	134 lb/ft	200 kg/m

Type		Solid bar construction welded steel sections
Ground clearance at pivot	24''	610 mm
Wheel lean angle, right or left		20°
Oscillation, total		32°

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

Oscillating welded box section oil-tight housing	22.8'' x 8.7''	580 mm x 221 mm
Sprocket drive chain, single strand	2.00'' pitch	31.75 mm pitch
Sidewall thickness:
Inner	0.88''	22 mm
Outer	0.75''	19 mm
Wheel axle spacing	60.4''	1535 mm
Tandem oscillation		13° forward, 13° reverse

Hydraulic power steering providing stopped engine steering meeting SAE J53 and J1511.

Minimum turning radius	22'4''	6.8 m
Maximum steering range, right or left		50°
Articulation		23°

Bearings		Tapered roller
Tires		Low pressure, tubeless, 13.00 x 24, 10 ply rating - G2
Tire rims (demountable)		9.00 DC x 24

Pivoting control console and tilt steering wheel. Deluxe suspension cloth-covered seat and backrest with swing-up armrests. Large glass area for all-around visibility.

Fuel tank	89.8 U.S. gal	340 ltr
Cooling system	11.1 U.S. gal	42 ltr
Crankcase	3.8 U.S. gal	14 ltr
Transmission	11.9 U.S. gal	45 ltr
Final drive	4.5 U.S. gal	17 ltr
Tandem housing (each)	21.1 U.S. gal	80 ltr
Hydraulic system	22.5 U.S. gal	85 ltr
Hydraulic tank	11.9 U.S. gal	45 ltr
Circle reverse housing:
Standard	1.1 U.S. gal	4 ltr
Optional with slip clutch	1.8 U.S. gal	7 ltr

Includes lubricants, coolant, full fuel tank, and operator.

Total	30,525 lb	13850 kg
On rear wheels	21,825 lb	9900 kg
On front wheels	8,710 lb	3950 kg

Electric monitoring system with diagnostics:
Gauges:
Standard		Articulation, engine coolant temperature, fuel level, hour meter, message center
Optional		Speedometer, torque converter oil temperature
Warning lights:
Standard		Battery charge, directional indicator, engine oil pressure, heater signal, lift arm lock, parking brake, transmission electric circuit, and torque converter oil temperature
Optional		Blade accumulator, blade float, differential lock, differential oil temperature, high beam, working lights

The advanced monitoring system delivers self-diagnostics and can provide historical diagnostic information.

Tinted glass reduces glare, adding to operator comfort.

A simple blade suspension system allows good forward visibility.

Stable work equipment speeds are unaffected by engine speed.

Low front nose providing good visibility.

A wide working range is accomplished through unsurpassed blade geometry.

Bronze alloy guides on blade and circle provide long service life.

Operator comfort - is a priority with low noise environment, excellent visibility with slim beams and post and well positioned air conditioner vents.

Excellent visibility to the rear. Front and rear glass is angled to prevent dust build up.

Komatsu SA6D102E turbocharged and aftercooled diesel provides 104 kW 140 HP (GD555) and 119 kW 160 HP (GD555 VHP) for demanding applications.

Access to all necessary engine maintenance items is easy with wide hinged compartment doors.

Brakes are hydraulically operated wet type multiple-disc and maintenance free. No air system.

The lock-up torque converter provides smooth power for grading and speed for roading or snow removal.

Wheel spin is reduced with the manual lock/unlock differential.

Dimensions

Air cleaner, dual element, dry type, and service indicator

Alarm, back-up

Alternator, 50 amp

Batteries, heavy-duty, 750 cca each

Brakes, sealed oil disc brakes

Cab, deluxe enclosed ROPS/FOPS

Circle slip clutch

Console adjustable

Control valve bank, 8-section

Decelerator/accelerator pedal

Differential, lock/unlock with planetaries

Dome light

Electrical system, 24 volt

Engine, Komatsu turbocharged and aftercooled diesel

Engine preheat

Frame articulation

Full hydraulic steering, leaning front wheels

Headlights on cab: Cab mounted with turn and hazard

Hinged hood-sides for engine compartment

Hinged lower front cab glass windows with wipers

Horn

Hydraulic circle shift, blade shift, and blade lift

Hydraulic system, load-sensing closed center

Inside convex mirror

Keyed doors

Lights, rear back-up, stop/tail

Moldboard, 12' x 24'' x 0.87'' / 3658 mm x 610 mm x 22 mm, 17'' / 432 mm radius with replaceable end bits, through-hardened cutting edge

Maximum moldboard angle position 90° right and left

Seat, suspension (deluxe)

Throttle, hand control

Tilt steering wheel

Tinted safety glass

Tires, 13.00 x 24, 10 PR-G2 with 9'' rims, tubeless

Toolbox

Transmission, full power shift with selectable torque converter or direct drive

Transmission monitoring system with diagnostics/message center

Vandalism protection

Variable horsepower

Windshield wipers - front with washers

Accumulators, anti-shock for blade lift

Air conditioner with R134A refrigerant

Air intake extension

Alternator, 75 amp

AM/FM radio with cassette

Cab, high deluxe with ROPS

Canopy ROPS

Defroster fan, front and rear

Hazard lights

Headlights: Front bar mounted with turn and hazard

Heater and defroster

Moldboard, 14' x 24'' x 0.87'' / 4267 mm x 660 mm x 23 mm

Optional cutting edges

Optional hydraulic control valves:

-right (up to 6, addition 2)

-left (up to 7, addtion 3)

Optional paint

Optional tires

Outside convex mirrors

Overlay end bits

Pusher block

Ripper, rear mounted with holding valve

Scarifier, forward mounted with holding valve

Speedometer

Tachometer

Transmission guard

Turn signals

Windshield wipers, two lower, rear dual with washer

Work lights, two blade and two rear

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