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E
E
NGINE AND
NGINE AND
T
T
ORQUE
ORQUE
Engine
Fuel Efficient Engine
The field-proven, rugged reliable Komatsu
225 kW 302 HP SA6D140E-2 provides high
torque for efficient dozing power and high
reliability and low fuel consumption.
Automatic Preheating Mechanism
The best preheating times is set
automatically by sensing ambient temp-
erature. This simplifies the preheating
operation.
8
C
C
ONVERTER
ONVERTER
Modular Power Train Components
Modular design has facilitated removal/
installation of power train components,
shortening machine downtime.
Wet, Multiple-Disc Brakes
Eliminate brake adjustments for
maintenance-free operation.
Various Features for
Easy Maintenance
● Radiator reserve tank
● Gull-wing engine side doors
● Centralized oil pressure test ports
● Centralized filter arrangement
Photo may include optional equipment
S
S
PECIFICATIONS
PECIFICATIONS
ENGINE
Komatsu SA6D140E-2, water-cooled, 4-cycle, turbocharged and
aftercooled, diesel engine, 6 cylinders with 140 mm 5.51" bore x
165 mm 6.50" stroke and 15.24 ltr 930 in
3
piston displacement.
Flywheel horsepower*:
SAE J1349. . . . . . . . . . . . . . . . . . . . 225 kW 302 HP at 1900 rpm
DIN 6270 . . . . . . . . . . . . . . . . . . . . . 225 kW 305 PS at 1900 rpm
Maximum torque . . . . . . . . . . . . . . 160 kg•m 1,157 lb/ft @ 1250 rpm
* Net flywheel horsepower output for standard engine (SAE J1349)
including air cleaner, alternator (not charging), water pump, lubricating
oil pump, fuel pump, muffler, and fan.
Direct-injection fuel system. All-speed mechanical governor.
Forced lubrication driven by gear pump. Full-flow filter for lube
oil purification. Dual element, dry-type air filters with automatic
dust ejector and dust indicator. 24 V/11 kW electrical starting
motor. 24 V/35A alternator. 2 x 12 V/170 Ah batteries.
TORQFLOW TRANSMISSION
Komatsu's TORQFLOW transmission consists of a water-cooled,
3-element, 1-stage, 1-phase torque converter and a planetary gear,
multiple-disc clutch transmission which is hydraulically actuated
and force-lubricated for optimum heat dissipation. Joystick control
of gears (3 forward and 3 reverse) and directional steering changes.
Gearshift lock lever and neutral safety switch prevent machine from
accidental starts.
Travel speed
Forward
Reverse
1st
0–3.7 km/h 0–2.3 mph
0–5.0 km/h 0–3.1 mph
2nd
0–6.7 km/h 0–4.2 mph
0–8.2 km/h 0–5.1 mph
3rd
0–11.0 km/h 0–6.8 mph
0–13.9 km/h 0–8.6 mph
D155A-5
Power Shift
DRAWBAR PULL
VS
. SPEED.
160
70
MAXIMUM USABLE PULL
DEPENDS ON TRACTION AND
140
WEIGHT OF TRACTOR INCLUDING
600
60
MOUNTED EQUIPMENT.
120
500
50
100
400
40
80
300
30
F1
60
200
20
40
F2
10
100
20
F3
0
0
0
2
4
6
8
10
12
14 km/h
0
2
4
6
8
MPH
TRAVEL SPEED
FINAL DRIVE
Double-reduction, spur and planetary final drives increase tractive
effort. Segmented sprockets are bolt-on for easy in-the-field
replacement.
D155A-5
CRAWLER DOZER
STEERING
Joystick controls for all directional movements. Simply tilt the joystick
to the left to make a left turn. Tilt it to the right for a right turn.
Pushing the lever forward results in the machine forwarding, while
pulling it toward the operator reverses the machine. Gear shifting
also possible with the single-steering lever.
Wet, multiple-disc steering are spring-loaded hydraulically released.
Wet, multiple-disc, pedal-controlled service brakes are spring-
actuated and hydraulically released. Gearshift lock lever also applies
service brakes.
Minimum turning radius . . . . . . . . . . . . . . . . . . . . . . . . . . 3.7 m 12'2"
(As measured by track marks on ground.)
UNDERCARRIAGE
Suspension. . . . . . . . . . . . . . . . . . Oscillation-type with equalizer bar
and forward mounted pivot shafts
Track roller frame . . . . . . . . . . . . . . . . . . . . Monocoque, high-tensile-
strength steel construction
Lubricated track rollers are resiliently mounted to roller frame
through a series of exclusive X-type bogies whose oscillating
motion is cushioned by rubber pads.
Number of track rollers (each side) . . . . . . . . . . . . . . . . . . . . . . . . . 6
Number of carrier rollers (each side) . . . . . . . . . . . . . . . . . . . . . . . . 2
Lubricated tracks. Unique dust seals for preventing entry of foreign
abrasives into pin-to-bushing clearance for extended service. Track
tension easily adjusted with grease gun.
Number of shoes (each side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Grouser height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 mm 3.1"
Shoe width (standard/maximum) . . . . . . . . 560 mm 22"/710 mm 28"
Ground contact area . . . . . . . . . . . . . . . . . . . . . 35950 cm
2
5,572 in
Ground pressure (tractor only) . . . . . . 76.5 kPa 0.78 kg/cm
2
11.1psi
Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2100 mm 6'11"
COOLANT AND LUBRICANT
CAPACITY (
)
REFILLING
Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 ltr
26.2 U.S. gal
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 ltr 132.1 U.S. gal
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ltr
9.8 U.S. gal
Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 ltr
0.4 U.S. gal
Transmission, bevel gear
and steering system . . . . . . . . . . . . . . . . . . . 60 ltr
15.9 U.S. gal
Final drive (each side). . . . . . . . . . . . . . . . . . . . 58 ltr
15.3 U.S. gal
OPERATING WEIGHT (
)
APPROXIMATE
Tractor weight:
Including rated capacity of lubricant, coolant, full fuel tank, operator
and standard equipment . . . . . . . . . . . . . . . . . . . 27900 kg 61,510 lb
Above equipment plus optional side covers, air conditioner and 560 mm
22" extreme service shoes . . . . . . . . . . . . . . . . . 28600 kg 63,050 lb
Operating weight: Including Semi-U tiltdozer, multi-shank ripper,
steel cab, ROPS, operator, standard equipment, rated lubricant,
coolant full fuel tank, optional engine side covers, air conditioner and
560 mm 22" extreme service shoes . . . . . . . . . . 38700 kg 85,320 lb
Ground pressure . . . . . . . . . . . . . . . 105.9 kPa 1.08 kg/cm
2
15.4 psi
2
9
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