8
Superior Serviceability
Easy Access to Service Areas
•
Large hinged doors are standard and
provide easy access to the engine and
radiator service points. Spin-on oil filters can
be changed quickly.
•
Lubrication points for articulation joint are
remote-mounted.
•
Fuse panel is located in the operator
compartment. Circuits and
fuse sizes are clearly identified.
•
Tandem oil check point is conveniently
located at the end of the tandem.
•
Service meter is located on the left side of
the steering console, offering a clear view
from the ground.
Power Train Components
Features a modular design so you can remove
the engine, transmission or final drives
independently for quick service.
M
AINTENANCE
F
EATURES
M
AINTENANCE
F
EATURES
Message Center
The message center monitors the transmission and engine function with
computer sensors. There are six modes available with ability to scroll
through mode selections.
Maintenance-Free Oil Disc Brakes
Komatsu designs and builds multiple-disc brakes that are completely
sealed and adjustment-free. The brakes are oil bathed, hydraulically
actuated and spring-released and are located at each tandem wheel to
eliminate brake loads on the power train and to speed up servicing. A fully
hydraulic brake system eliminates all problems associated with air
systems. The large braking surface provides dependable braking capability
and long life before rebuild.
Friendly Environment
The rubber mounted engine and transmission transmit less engine noise
and vibration to the operator and extend component life.
GD555-3
MOTOR GRADER
9
ENGINE
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D102E-2
Type . . . . . . . . . . . . . . . . . . . . Water-cooled, 4-cycle, direct injection
Aspiration . . . . . . . . . . . . . . . Turbocharged and air to air aftercooled
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 mm
4.02"
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 mm
4.72"
Piston displacement. . . . . . . . . . . . . . . . . . . . . . . . . . 5.88 ltr
359 in
3
Gross horsepower
Gear 1~3 . . . . . . . . . . . . . . . . . . . . 110 kW
147 HP
@2000 rpm
Gear 4~8 . . . . . . . . . . . . . . . . . . . . . . 125 kW
167 HP
@2000 rpm
Net flywheel horsepower*
Gear 1~3 . . . . . . . . . . . . . . . . . . . . . . 104 kW
140 HP
@2000 rpm
Gear 4~8 . . . . . . . . . . . . . . . . . . . . . . 119 kW
160 HP
@2000 rpm
Peak torque
Gear 1~3 . . . . . . . . . . . . . 576 Nm 58.7 kg.m
425 lb.ft
@1500 rpm
Gear 4~8 . . . . . . . . . . . . . 729 Nm 74.3 kg.m
538 lb.ft
@1500 rpm
Torque rise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 %
Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 blade, pusher
Air cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-stage, dry-type
Electrical . . . . . . . . . . . . . . . . . . . . . . . 24 volt with 50 amp alternator
Battery . . . . . . . . . . . . . . . . 2, low maintenance plus, 12 volt, 112 Ah
* Net flywheel HP output for standard (SAE J1349) including air cleaner, alternator (not
charging), water pump, lubricating oil, fuel pump, muffler and fan.
TRANSMISSION AND
TORQUE CONVERTER
Full power shift transmission with integral free wheeling stator torque
converter and lock-up.
Speeds
(at rated engine speed)
S
PECIFICATIONS
S
PECIFICATIONS
Gear
Forward
Reverse
1st
3.3 km/h
2.1 mph
4.4 km/h
2.7 mph
2nd
4.8 km/h
3.0 mph
9.0 km/h
5.6 mph
3rd
6.8 km/h
4.2 mph
19.7 km/h
12.2 mph
4th
9.8 km/h
6.1 mph
39.1 km/h
24.3 mph
5th
14.9 km/h
9.3 mph
6th
21.6 km/h
13.4 mph
7th
29.6 km/h
18.4 mph
8th
42.9 km/h
26.7 mph
BRAKES
Service brake . . . . . . . . . . . . . . Foot operated, sealed oil disc brakes,
hydraulically actuated on four tandem wheels,
13338 cm
2
2067 in
2
total braking surface
Parking brake . . . . . . . . . . . . . . . . Manually actuated, spring applied,
hydraulically released caliper with
transmission interlock
TANDEM DRIVE
Oscillating welded box section . . . . . . . 580 mm x 221 mm
1'11" x 9"
Sprocket drive chain, single strand . . . . . . . . . . 31.75 mm
1.25"
pitch
Side wall thickness: Inner. . . . . . . . . . . . . . . . . . . . . . . . 22 mm
0.88"
Outer . . . . . . . . . . . . . . . . . . . . . . . 19 mm
0.75"
Wheel axle spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . 1535 mm
5'0"
Tandem oscillation . . . . . . . . . . . . . . . . . . . . 13° forward, 13° reverse
FRONT AXLE
Type . . . . . . . . . . . . . . . Solid bar construction welded steel sections
Ground clearance at pivot . . . . . . . . . . . . . . . . . . . . . . . 610 mm
2'0"
Wheel lean angle, right or left . . . . . . . . . . . . . . . . . . . . . . . . . . . 20°
Oscillation, total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32°
REAR AXLE
Alloy steel, heat treated, full floating axle, spiral bevel gear reduction.
WHEELS, FRONT AND REAR
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .tapered roller
Tires . . . . . . . . .low pressure, tubeless, 13.00 - 24 - 10 ply rating-G2
Tire rims (demountable) . . . . . . . . . . . . . . . . . . . . . . . . .9.00 DC x 24
STEERING
Hydraulic power steering providing stopped engine steering meeting
SAE J1511.
Minimum turning radius. . . . . . . . . . . . . . . . . . . . . . . . . . 6.8 m
22' 4"
Maximum steering range, right or left . . . . . . . . . . . . . . . . . . . . . . 49°
Articulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23°
FRAME
Section, welded unit (w x h) . . . . . . . . . 300 x 294 mm
11.8" x 11.6"
Side plate . . . . . . . . . . . . . . . . . . . . . . . . . 250 x 12 mm
9.8" x 0.47"
Vertical section modulus, front frame:
Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2140 cm
3
131 in
3
Maximum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4860 cm
3
297 in
3
Linear weight per length, front frame:
Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 kg/m
102 lb/ft
Maximum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 kg/m
134 lb/ft