1110
STEERING SYSTEM
PCCS, joystick controlled, wet multiple-disc steering clutches are
spring-loaded and hydraulically released. Wet multiple-disc,
pedal/lever controlled steering brakes are spring-actuated
hydraulically released and require no adjustment. Steering clutches
and brakes are interconnected for easy, responsive steering.
Minimum turning radius. . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 m 13'9"
UNDERCARRIAGE
Suspension . . . . . . . . . . . . . Oscillating equalizer bar and pivot shaft
Tr ack roller frame. . . . . . . . . . . . . . . Cylindrical, high-tensile-strength
steel construction
Rollers and idlers. . . . . . . . . . . . . . . . . . . . . . Lubricated track rollers
K-Bogie undercarriage
Lubricated track rollers are resiliently mounted to the track
frame with a bogie suspension system whose oscillating motion
is cushioned by rubber pads.
Extreme service track shoes
Lubricated tracks. Unique seals prevent entry of foreign
abrasives into pin to bushing clearances to provide extended
service life. Track tension is easily adjusted with grease gun.
Number of shoes (each side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Grouser height:
Single grouser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 mm 3.7"
Shoe width (standard) . . . . . . . . . . . . . . . . . . . . . . . . . . 610 mm 24"
Ground contact area . . . . . . . . . . . . . . . . . . . . . 48560 cm
2
7,527 in
2
Ground pressure (tractor) . . . . . . . . . . 108 kPa 1.10 kg/cm
2
15.6 psi
Number of track rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Number of carrier rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
COOLANT AND LUBRICANT
CAPACITY (REFILL)
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . .1200 ltr 317.0 U.S. gal
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 ltr 31.7 U.S. gal
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 ltr 22.7 U.S. gal
Torque converter, transmission,
bevel gear, and steering system . . . . . . . . .150 ltr 39.6 U.S. gal
Final drive (each side) . . . . . . . . . . . . . . . . . . . .65 ltr 17.1 U.S. gal
Extreme Additional Ground Ground
service shoes weight contact area pressure
710 mm 680 kg 56520 cm
2
126 kPa
1.28 kgf/cm
2
28" 1,500 lb 8,760 in
2
18.2 psi
810 mm 1360 kg 64480 cm
2
111 kPa
1.13 kgf/cm
2
32" 3,000 lb 9,990 in
2
16.0 psi
ENGINE
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D170E-5
Type. . . . . . . . . . . . . . . . . . . . . 4-cycle, water-cooled, direct injection
Aspiration. . . . . . . . Turbocharged, air-to-air aftercooled, cooled EGR
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore x stroke . . . . . . . . . . . . . . . . . 170 mm x 170 mm 6.69" x 6.69"
Piston displacement . . . . . . . . . . . . . . . . . . . . . . . 23.15 ltr 1,413 in
3
Governor . . . . . . . . . . . . . . . . . . All-speed and mid-range, electronic
Horsepower
SAE J1995 . . . . . . . . . . . . . . . . . . . . . . . . Gross 474 kW 636 HP
ISO 9249 / SAE J1349* . . . . . . . . . . . . . . . . . Net 455 kW 610 HP
Rated rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1800 rpm
Fan drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic
Lubrication system
Method . . . . . . . . . . . . . . . . . . . . . . . Gear pump, force lubrication
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full-flow
*Net horsepower at the maximum speed of
radiator cooling fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
433 kW 580 HP
TORQFLOW TRANSMISSION
Komatsu TORQFLOW transmission consists of a water-cooled,
3-element, 1-stage, 1-phase torque converter with lockup clutch
and a planetary gear, multiple-disc clutch transmission which is
hydraulically actuated and force-lubricated for optimum heat
dissipation. Gearshift lock lever and neutral safety switch
prevent accidental starts.
FINAL DRIVES
Double-reduction final drive of spur and planetary gear sets to
increase tractive effort and reduce gear tooth stresses for long final
drive life. Segmented sprocket teeth are bolt-on for easy replacement.
Gear Forward Reverse
1st 3.5 km/h 2.2 mph 4.6 km/h 2.9 mph
2nd 6.8 km/h 4.2 mph 8.9 km/h 5.5 mph
3rd L 8.0 km/h 5.0 mph 9.7 km/h 6.0 mph
3rd 11.8 km/h 7.3 mph 15.8 km/h 9.8 mph
D375A-6
Power Shift
DRAWBAR PULL VS. SPEED
MAXIMUM USABLE PULL
DEPENDS ON TRACTION AND
WEIGHT OF TRACTOR
INCLUDING MOUNTED
EQUIPMENT
S
PECIFICATIONS
D375A
-6
CRAWLER DOZER
D375A-6 C RAWLER D OZER
N
EW
S
AFETY &
M
AINTENANCE
F
EATURES
Highly mounted headlights
Illuminate the places in front of the
machine more effectively. Use of HID
lamps allows for performing night
works more safely.
Uninterrupted power source *
Uninterrupted power source allows for 2-way radio
communication at any time. Interior lights can be turned on
with the starting switch at OFF position. (The lights do not
work with the opening/closing of the cab door.)
Access lights *
Access lights are installed at two
places (the right and left) of the front
and at one place of the rear of the
machine for safe getting on/off and
servicing at night.
Working light for the engine bay *
A working light is installed inside the
engine hood (left side) to facilitate
night-time inspection and
maintenance.
Isolator box *
Battery isolator and starting motor isolator are housed in the
isolator box on the left side of the machine to facilitate cut-off
of the battery circuit for the maintenance of the machine.
Rear view camera
Allows the operator to see the rear
view image sent from it on the
monitor. (Be sure to check the safety
around the machine with your eyes.
The rear view camera is a mere
supplement device to check the rear
safety.)
Manual emergency engine
shutdown switches *
In case you urgently need to stop the
engine, use either of the two switches
installed in the cab and at the rear
right of the machine. (Do not use the
switches for normal engine stop.)
Provision for platform *
Provision for platform eliminates the need to modify the
machine for installation of platform.
Platform with handrails and toe
boards
Platform gives access to the side
faces and the rear of the machine.
Check and refilling of fuel and
hydraulic oil, cleaning of cab window
glass, check of cab lights, etc. can be
performed with ease.
Canister-type breather *
Canister-type breathers are remotely
arranged inside the left exterior cover to
facilitate check and cleaning of the
breather of each component.
A : Power train case B : Flywheel housing
C : Damper case
Evacuation service center *
Couplings (made by Wiggins)
installed at the rear left of the
machine allows for quick drain and
charge of oil and coolant. The service
center eliminates the need to get on/off the machine and to
remove/install covers for the work, and realizes safe and
quick servicing.
A : Engine oil B : Radiator coolant
C : Transmission oil D : Hydraulic oil
Concentrated sampling points *
Concentrated sampling points are
remotely arranged in the right storage
for the tool box to facilitate sampling
of the oil and coolant from each
component.
A : Engine oil B : Radiator coolant
C : Transmission oil D : Hydraulic oil
ABC
BACD
BDAC
Rear view camera
Camera image
Switch location (at the rear)
Switch location (inside the cab)
Jump-start connectors are also provided
in the box in case the batteries run out.
A : Starter isolator B : Batteries isolator
C : Jump start receptacle
A
B
C
Komatsu designs our bulldozers with safety in mining operations. Following safety features are optionally available for D375A-6.
Safety features marked with * are standard equipment for D375A-6 with mining specification.
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