7
6
S
PECIFICATIONS
D68ESS
D68ESS-12
C
R A W L E R
D
O Z E R
CRAWLER DOZER
ENGINE
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu S6D114E-1A
Type . . . . . . . . . . . . . . . 4-stroke cycle, water-cooled, direct injection
Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turbocharged
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore x stroke. . . . . . . . . . . . . . . . .
114 mm
x
135 mm
4.49" x 5.31"
Piston displacement . . . . . . . . . . . . . . . . . . . . . . . . .
8.27 ltr
5.05 in
3
Governor . . . . . . . . . . . . . . . . . . . . . . . . . . . . All-speed, Mechanical
Horsepower
SAE J1995 . . . . . . . . . . . . . . . . . . . . . . . . . Gross
130kW
175HP
ISO 9249 / SAE J1349 . . . . . . . . . . . . . . . . . . Net
116kW
155HP
Rated rpm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1850rpm
Fan drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical
Lubrication system
Method . . . . . . . . . . . . . . . . . . . . . . Gear pump, forced lubrication
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full-flow
Net maximum torque. . . . . . 824 N•m
84 kg•m
608 lb ft @ 1300 rpm
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
0–3.4 km/h
0–2.1 mph
0–4.4 km/h
0–2.7 mph
2nd
0–5.8 km/h
0–3.6 mph
0–7.5 km/h
0–4.7 mph
3rd
0–9.0 km/h
0–5.6 mph
0–11.0 km/h
0–6.8 mph
30
20
10
0
36
30
20
10
0
0
0
1
2
3
4
5
6
7
mph
Travel Speed
Dra
wbar Pull
2
4
6
8
10
12 km/h
US ton
ton
kN
300
200
100
0
40
F1
F3
F2
D68ESS-12
Power Shift
DRAWBAR PULL
VS
. SPEED.
MAXIMUM USABLE PULL
DEPENDS ON TRACTION AND
WEIGHT OF TRACTOR
INCLUDING MOUNTED
EQUIPMENT.
FINAL DRIVES
Double-reduction final drives of spur gear and planetary gears to
minimize transmission of shocks to power train components.
Segmented sprocket are bolt-on for easy in-the-field replacement.
COOLANT AND LUBRICANT
CAPACITY (
REFILL
)
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . .
315 ltr
83.3 U.S. gal
Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44 ltr
11.6 U.S. gal
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 ltr
5.0 U.S. gal
Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 ltr
0.3 U.S. gal
Transmission, bevel gear,
and steering system . . . . . . . . . . . . . . . . . . .
44 ltr
11.6 U.S. gal
Final drive (each side) . . . . . . . . . . . . . . . . . .
28.5 ltr
7.5 U.S. gal
STEERING SYSTEM
Joystick controls for all directional movements. Pushing the joystick
forward results in forward machine travel, while pulling it rearward
reverses the machine. Simply tilt the joystick to the left to make a
left turn. Tilt it to the right for a right turn.
Wet, multiple-disc steering clutches are hydraulically loaded and
hydraulically released. Wet, multiple-disc pedal-controlled steering
brakes are spring-actuated and hydraulically released.
Steering brakes also function as service and parking brakes.
Minimum turning radius*:. . . . . . . . . . . . . . . . . . . . . . . . .
3.2 m
10'6"
*As measured by track marks on ground.
UNDERCARRIAGE
Suspension . . . . . . . . . . . . . . . . . . . . . Oscillation with equalizer bar
and forward mounted pivot shafts
Track roller frame . . . . . . . . . . . . . . . . . . . Monocoque, large section,
durable construction
Track shoes. . . . . . . . . . . . . . . . Lubricated tracks. Unique dust seals
for preventing entry of foreign abrasives into
pin-to-bushing clearances for extended service.
Track tension is easily adjusted with a grease gun.
Number of carrier rollers (each side) . . . . . . . . . . . . . . . . . . . . . . . . 2
Number of track rollers (each side) . . . . . . . . . . . . . . . . . . . . . . . . . 6
Number of shoes (each side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Grouser height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65 mm
2.6"
Shoe width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
560 mm
22"
Track gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1925 mm
6'4"
Length of track on ground. . . . . . . . . . . . . . . . . . . . . . .
2725 m
8'11"
Ground contact area . . . . . . . . . . . . . . . . . . . . .
30520 cm
2
4,730 in
2
Ground pressure . . . . . . . . . . . . . . . .
53.9 kPa
0. 55 kg/cm
2
7.82 psi
OPERATING WEIGHT (
APPROXIMATE
)
Tractor weight:
Including rated capacity of lubricant, coolant, full fuel tank, operator
and standard equipment. . . . . . . . . . . . . . . . . . .
14640 kg
32,280 lb
Operating weight:
Including straight tilt dozer, cab, operator, standard equipment, and
rated capacity of lubricants, coolant, and full fuel tank
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16650 kg
36,710 lb
HYDRAULIC SYSTEM
Closed-center load sensing system (CLSS) designed for precise
and responsive control, and for efficient simultaneous operation.
Hydraulic control units:
All spool control valves externally mounted beside the hydraulic tank.
Type of pump:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear pump
Capacity (discharge flow at rated engine rpm):
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
134 ltr/min
35.4 U.S. gal/min
Relief valve setting . . . . . . . . . . . . . .
20.6 MPa
210 kg/cm
2
2,990 psi
Hydraulic cylinders . . . . . . . . . . . . . . . . . . . . . . Double-acting, piston
Control valves:
Spool control valve for mechanical angle power tilt dozer.
Positions: Blade lift . . . . . . . . . . . . . . . Raise, hold, lower, and float
Blade tilt . . . . . . . . . . . . . . . . . . . . . Right, hold, and left
Additional control valve for multi-shank ripper
Positions:Ripper lift . . . . . . . . . . . . . . . . . . . Raise, hold, and lower
Hydraulic oil capacity (refilling):
Straight tilt dozer. . . . . . . . . . . . . . . . . . . . . .
48.0 ltr
12.7 U.S. gal
Number of cylinders
Bore
Blade lift
2
110 mm
4.33"
Blade tilt
1
140 mm
5.51"
Remarks: * Blade capacities are based on the SAE recommendation practice J1265.
DOZER EQUIPMENT
Use of high tensile strength steel in moldboard for strengthened blade construction.
Overall length
Blade
Blade
Maximum lift
Maximum drop
Maximum tilt
Angling
Additional
with dozer
capacity*
length x height
above ground
below ground
adjustment
angle
weight
Straight Tilt Dozer
5053 mm
3.0 m
3
3200 mm x 1100 mm
1005 mm
460 mm
600 mm
1770 kg
16'6"
3.9 yd
3
10'6" x 3'7"
3'4"
1'6"
2'
–
3,900 lb
Mechanical Angle
5413 mm
2.6 m
3
3980 mm x 950 mm
1130 mm
540 mm
200 mm
2710 kg
Dozer
17'9"
3.4 yd
3
13'1" x 3'1"
3'8"
1'9"
8"
25 degree
5,980 lb
DIMENSIONS
Ground clearance . . . . . . . . . . .
390 mm
1'3"
A
1925 mm
6'4"
H
2725 mm
8'11"
B
3200 mm
10'6"
I
5070 mm
16'8"
C
290 mm
11"
J
65 mm
2.6"
D
600 mm
2'0"
K
505 mm
1'8"
E
2770 mm
9'1"
L
3025 mm
9'10"
F
1005 mm
3'4"
M
3140 mm
10'4"
G
460 mm
1'6"
Dimension with straight tilt dozer.
A
D
C
E
F
G
J
K
L M
I
H
G.L.
B
