Komatsu D375A-5R User manual

www.Komatsu.com Printed in Japan 200801 IP. AD (10)
CEN00203-01 Materials and specifications are subject to change without notice
is a trademark of Komatsu Ltd. Japan
HORSEPOWER
Gross: 451 kW 605 HP @ 1800 rpm
Net: 391 kW 525 HP @ 1800 rpm
OPERATING WEIGHT
68370 kg 150,730 lb
Photo may include optional equipment.
D375A-5R
CRAWLER DOZER

Electronic Controlled Modulation
Valve (ECMV) controlled steering
clutch/brake system facilitates smooth
and shockless steering operation.
See page 5.
2 3
D375A-5 Crawler Dozer
Simple hull frame
and monocoque track
frame with pivot shaft for
greater reliability.
Extra-low machine profile
provides excellent machine balance
and low center of gravity.
Large blade capacities:
18.5 m324.2 yd3(Semi-U dozer)
and 22.0 m328.8 yd3(U dozer)
Preventative maintenance
●Centralized service station
●Enclosed hydraulic piping
●Modular power train design
●Oil pressure checking ports
See page 9.
Photo may include optional equipment.
The Dual tilt dozer
(option) increases
productivity while
reducing operator
effort. See page 7.
Automatic lockup torque converter
saves fuel and increases speed and
power transmission efficiency on
long pushes. See page 6.
New track link design
reduces maintenance cost by
making turning pins easier, with
improved pin reuse. See page 9.
K-Bogie undercarriage system
improves traction, component durability,
and operator comfort. See page 8.
Rippers (option):
●Variable giant
●Multi-shank
See page 7.
New hexagonal designed cab includes:
●Spacious interior
●Comfortable ride with new cab damper mounting and K-Bogie undercarriage
●Excellent visibility
●High capacity air conditioning system (optional)
●Palm Command Control System (PCCS) lever
●Pressurized cab (optional)
●Adjustable left armrest
●Travel control console integrated with operator seat
See page 8.
Track shoe slip control system (option)
reduces operator fatigue. See page 7.
Komatsu-integrated design
for the best value, reliability, and versatility.
Hydraulics, power train, frame, and all
other major components are engineered
by Komatsu. You get a machine whose
components are designed to work together
for higher production, greater reliability,
and more versatility.
Low-drive, long-track, seven roller undercarriage
provides outstanding grading ability and stability.
WALK-AROUND
D375A-5R
HORSEPOWER
Gross: 451 kW 605 HP @ 1800 rpm
Net: 391 kW 525 HP @ 1800 rpm
OPERATING WEIGHT
68370 kg 150,730 lb
BLADE CAPACITY
Semi-U: 18.5 m324.2 yd3
Full-U: 22.0 m328.8 yd3
CRAWLER DOZER
D375A-5R CRAWLER DOZER
Hydraulic driven radiator cooling fan
controlled automatically, reduces fuel consumption
and operating noise levels.
See page 6.
SAA6D170E-5 turbocharged after-cooled
diesel engine provides an output of 391 kW 525 HP
with excellent productivity. See page 6.
Filtration
Fuel and hydraulic oil filtration improvements reduce fuel and
hydraulic system contamination and enhance machine reliability.
See page 10.

Human-machine interface
Palm command
electronic controlled
travel control joystick
Ergonomically designed palm
command travel joystick
provides the operator with a
relaxed posture and superb
fine control without operator
fatigue. Transmission gear
shifting is simply carried
out with thumb.
Fully adjustable
suspension seat and
travel control console
For improved rear visibility
during return part of cycle, the operator can adjust the seat
15° to the right. The transmission and steering controls
move with the seat for best operator comfort. The travel
control console has adjustments fore and aft and for height.
With an independently adjustable armrest, each D375A
operator can adjust control positions to his individual
preference, providing optimum operational posture for
all operators.
Fuel control dial
Engine RPM is controlled by electric signals, providing ease
of operation eliminating maintenance of linkage and joints.
Palm command PPC controlled
blade control joystick
Blade control joystick uses the PPC (Proportional Pressure
Control) valve and the same palm command type joystick as
travel control joystick. PPC control, combined with the highly
reliable Komatsu hydraulic system, provides superb fine
control. (Dual tilt and pitch operation are activated by
depressing switch with a thumb. This is available with optional
dual tilt dozer.)
Height adjustable blade control armrest
Blade control armrest is height adjustable without any tools
in three stages, providing the operator with firm arm support
and ideal armrest positioning.
Position adjustable ripper control lever
Ripper control lever is position adjustable, providing optimum
operation posture for all operators during ripping operations
facing front or watching ripper point.
54
Komatsu’s new ergonomically designed control system “PCCS” creates an operating
environment with “complete operator control”.
Power train electronic control system
Smooth and soft operation
D375A-5R uses a newly designed power train electronic control system.The controller registers the amount of operator control
(movements of lever and operation of switches) along with machine condition signals from each sensor to accurately calculate
the control of the torque converter, transmission, steering clutches and brakes for optimized machine operation. The ease of
operation and productivity of the new D375A-5R is greatly improved through these new features.
Electronic Controlled Modulation Valve (ECMV) controlled transmission
Controller automatically adjusts each clutch engagement depending on travel
conditions such as gear speed, RPM and shifting pattern. This provides
shockless, smooth clutch engagement, improved component reliability,
improved component life and operator ride comfort.
Electronic Controlled Modulation Valve (ECMV) controlled steering clutches/brakes
Sensors monitor machine operating conditions and electronically control steering clutches and brakes. Monitoring application
parameters, such as size of load during dozing, incline angle of slope, and load provides smooth and easy counter-steering on
downhill travel, etc.
Preset travel speed selection function
Preset travel speed selection function is standard equipment, enabling the operator to select fore and aft travel speed
from three preset patterns; F1-R1, F1-R2 and F2-R2 by using the UP/DOWN switch. When the F1-R2 or F2-R2 preset pattern
is selected and the travel control is moved into forward or reverse, the machine travels in the preset gear range automatically.
This function reduces manual gear shifting frequency during machine operation, enabling the operator to focus on directional
and hydraulic control. Preset travel speed selection is especially helpful when used in combination with the Auto-Downshift
Function and reduces cycle times during repeated round trip operations.
When dozing and turning, ECMV automatically
controls stroke ratio of steering clutches
and brakes depending on degree of
load, enabling smooth dozing
and turning.
When dozing downhill, ECMV
automatically controls steering clutches
and brakes depending on incline of
machine or degree of load, reducing
counter-steering and producing
smooth dozing operation.
Auto downshift function
Controller monitors engine speed travel gear and travel
speed. When load is applied and machine travel speed is
reduced, the controller automatically downshifts to optimum
gear speed to provide high fuel efficiency. This function
provides comfortable operation and high productivity without
manual downshifting. (This function can be cancelled with
cancel switch.)
F1-R2 MODE
F1-R1 MODE
F2-R2 MODE
Press DOWN switch
Press DOWN switch
Press UP switch
Press UP switch
UP
DOWN
Indicator
Heavy load Light load
Actuated on heavy load
or steep slope
Effect of ECMV steering clutches/brake control
Facing front
When turned 15°
Left-hand joystick
Blade and ripper
control joystick
MONITORSYSTEM
Blade
control
lever
Ripper
control
lever
Travel
control
lever
Brake pedal
potentio meter
Acceleration
sensor
Service
switch
Auto shift
down switch
Fuel
control
dial
Steering controller
Monitor panel
Deceleration
pedal
Transmission
controller
Transmission control
Torque converter control
Implement control
Engine controller
Electronic controlled
transmission
Electronic controlled
steering/brake system
Engine Torque converter
Transmission
control valve
Lockup
Engine
speed
Water
temp.
Fuel temp.
Engine oil
pressure
Fuel control
valve unit
ECMV ECMV ECMV ECMV
ECMV ECMV ECMV ECMV
Auxiliary
valve
Trans-
mission
output
speed
sensor
ECMV
Outline of electronic control system
Electronic Controlled
Modulation Valve (ECMV)
Conventional modulation valve
Time
Clutch pressure
PALM COMMAND CONTROL SYSTEM (PCCS)
D375A-5R
CRAWLER DOZER
D375A-5R CRAWLER DOZER

Large blade
Capacities of 18.5 m324.2 yd3(Semi-U dozer) and 22.0 m328.8 yd3(U dozer) yield outstanding production. High-tensile-
strength steel comprising the front and sides of the blade increase durability.
Dual tilt dozer (option)
The dual tilt dozer increases productivity while reducing operator effort.
●Optimum blade cutting angle for all types of materials and grades can be
selected on-the-go for increased load and production.
●Digging, hauling, and dumping are easy and smooth with less operator fatigue.
●Dozer tilt angle and tilt speed are twice that of a conventional single tilt system.
Rippers (option)
●The variable giant ripper features a long sprocket center-to-ripper point distance,
making ripping operation easy and effective while maintaining high penetration force.
●The variable giant ripper is a parallelogram single shank ripper ideal for ripping tough material. The ripping angle is
variable, and the depth is adjustable in three stages by a hydraulically controlled pin puller.
●The multi-shank ripper is a hydraulically controlled parallelogram ripper with three shanks.
Track shoe slip control system (option)
●Eliminates the need for the operator to constantly control engine power output with the decelerator
while ripping. Operator fatigue is substantially reduced.
●Maneuverability is improved because the operator is free to focus on the ripping application without
having to monitor the track shoe slippage.
●Repair costs are significantly lowered and undercarriage life is prolonged with the reduction in track
shoe slippage.
●The track shoe slip control system will contribute to lower fuel costs, because the engine output is
automatically controlled to optimum levels for operation.
7
Track shoe slip
control panel
Torque
converter
Engine Transmission
Lockup “ON”
Lockup “OFF”
Engine
The Komatsu SAA6D170E-5 engine delivers 391 kW 525 HP
at 1800 rpm. The fuel-efficient Komatsu engine, together
with the heavy machine weight, make the D375A-5R a
superior crawler dozer in both ripping and dozing production.
The engine features direct fuel injection, turbocharger, and
air-to-air aftercooler to maximize fuel efficiency.
To minimize noise and vibration, the engine is mounted
to the main frame with rubber cushions.
Hydraulic driven radiator cooling fan
Fan rotation is automatically controlled depending on
coolant and hydraulic oil temperature, saving fuel
consumption and providing great productivity with a quiet
operating environment.
Automatic torque converter lockup system
For greater efficiency during long pushes, the lockup
mode allows the system to automatically engage the torque
converter lockup clutch. Locking up the torque converter
transmits all the engine power directly to the transmission,
increasing ground speed thus achieving efficiencies equal
to a direct drive. The result is efficient use of engine power,
less fuel consumption, and faster cycle times.
K-Bogie undercarriage system
New K-Bogie undercarriage system combines prior
advantages with new additional features.
Current features:
●Effective length of track on ground is consistent.
Shoe slippage is minimized, resulting in higher traction.
●The idler does not oscillate under load, providing excellent
machine balance. Blade and ripper penetration force
remains stable for increased productivity.
New features on K-Bogie undercarriage system
●K-Bogies oscillate with two fulcrums, and track roller
vertical travel is greatly increased. Impact loading to
undercarriage components is reduced and component
durability is improved since track rollers are always in
contact with track link.
●Undercarriage life is improved due to better control of track
chain alignment with track rollers.
●Riding comfort is improved by reducing vibration and shock
when traveling over rough terrain.
6
PRODUCTIVITY FEATURES
D375A-5R
CRAWLER DOZER
D375A-5R CRAWLER DOZER
Fulcrum of major bogie
Fulcrum of minor bogie

98
Preventative maintenance
Preventative maintenance is the only way to ensure long service life from your equipment. That’s why Komatsu designed the
D375A-5R with conveniently located maintenance points to make necessary inspections and maintenance quick and easy.
Low maintenance costs
Rubber
Silicon Oil
Spring
Rubber Boot
Operator comfort
Operator comfort is essential for productive work. The D375A-5R
provides the operator with a quiet, comfortable environment where the operator
can concentrate on the work at hand.
Hexagonal pressurized cab
●The cab’s new hexagonal design and large tinted glass windows provide
excellent front, side and rear visibility.
●Air filters and a higher internal air pressure combine to help prevent dust from
entering the cab.
Comfortable ride with new cab damper mounting
and K-Bogie undercarriage
D375A-5R’s cab mount uses a new cab damper
mounting which further improves viscous damper and
provides excellent shock and vibration absorption capacity
with its long stroke. The cab damper mounting, combined
with new K-Bogie undercarriage, softens shocks and
vibrations while traveling over adverse condition that are
impossible to absorb with conventional cab mounting
methods. The soft spring cab damper isolates the cab
from machine body, suppressing vibrations and providing
a quiet, comfortable operating environment.
New suspension seat
D375A-5R uses a new suspension seat. Fore and aft sliding
rails and suspension spring increases strength and rigidity.
New seat provides excellent support and riding comfort. Fore and
aft sliding amount is designed to fit all operators.
Fresh air intake from rear of engine hood
The air conditioner air intake port is now located at the rear of the engine hood where
there is minimal dust. As a result, the air inside the cab is cleaner. Cleaning interval
of the filter is greatly extended, and use of a new structure filter element facilitates
cleaning and replacement.
Cab damper mounting
Photo may include optional equipment.
Track link with wedge ring
New D375A-5R track links feature
reduced press-fit force and a
wedge ring. Conventional track
pins are retained only with a large
press-fit force. The new track link
divides pin forces between the
wedge ring and press-fit force.
This results in easier service with
reduced pin damage when turning
pins and bushings. The result is
improved undercarriage life and reduced maintenance cost
through reduced wear, greater pin reusability, and reduced
maintenance man-hours.
Highly reliable electric circuit
The electrical circuit reliability is increased by utilizing dust,
vibration and corrosion resistant "DT connectors".
The reinforced electrical wiring harnesses include a circuit
breaker and are covered with a heat-resistant material to
increase mechanical strength, provide longer life, and
protect the system from damage.
Flat face O-Ring seals
Flat face O-ring seals are used to securely seal all
hydraulic hose connections and to prevent oil leakage.
Enclosed hydraulic piping
Hydraulic piping for the blade tilt cylinder is completely
housed in the push arm protecting it from damage.
Modular power train design
Power train components are sealed in a modular design
that allows the components to be dismounted and mounted
without oil spillage, making servicing work clean, smooth,
and easy.
Adjustment-free disc brakes
Wet disc brakes require less maintenance.
Wedge ring
Pin press fitting
force +
wedge ring
holding force
Track
guiding
guard
WORKING ENVIRONMENT
D375A-5R
CRAWLER DOZER
D375A-5R CRAWLER DOZER
MAINTENANCE
Photo may include optional equipment.
Monitor with self-diagnostic function
When the starting switch turned ON, the monitor displays P
on the upper part of the display, service meter on the lower
part of the display and Check-before-starting and caution
items appear on the right part of the liquid crystal panel.
If the monitor finds abnormalities, corresponding warning
lamp blinks and warning buzzer sounds. The monitor
displays engine rpm and forward/reverse gear speed on the
upper part of the display during operation. If an error
occurs during operation, and a high importance user code is
displayed, a caution lamp blinks and warning buzzer
sounds to prevent the development of serious problems.
Centralized service station
To ensure convenient maintenance, the transmission
and torque converter oil filters are both arranged next to
the power train oil level gauge.
Oil pressure checking ports
Pressure checking ports for power train components are
centralized to promote quick and simple diagnosis.
Enlarged engine room
Engine room space is enlarged by increasing engine
hood height, facilitating maintenance of the engine and
related equipment. Solid engine hood prevents dust
and rain from entering and keeps the engine clean.
Gull-wing engine side covers
Gull-wing engine side covers facilitate engine maintenance
and filter replacement. Side covers are a thick two-piece
structure with bolt-on latch to improve durability and
repairability.

RELIABILITY FEATURES
D375A-5R
CRAWLER DOZER
D375A-5R CRAWLER DOZER
SPECIFICATIONS
Filtration
Engine
Newly added main fuel filter of 2µ and water separator help
protect the engine against dust and water in the fuel.
1110
STEERING SYSTEM
PCCS lever, 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
Track 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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Grouser height:
Single grouser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 mm 3.7"
Shoe width (standard) . . . . . . . . . . . . . . . . . . . . . . . . . . 610 mm 24"
Ground contact area . . . . . . . . . . . . . . . . . . . . . 46850 cm27,262 in2
Ground pressure (tractor) . . . . . . . . . . 106 kPa 1.08 kg/cm215.4 psi
Number of track rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Number of carrier rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
COOLANT AND LUBRICANT
CAPACITY (REFILL)
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . .1050 ltr 277 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 660 kg 54530 cm2125 kPa
1.27 kgf/cm2
28" 1,460 lb 8,452 in218.1 psi
810 mm 1330 kg 62210 cm2110 kPa
1.12 kgf/cm2
32" 2,930 lb 9,643 in215.9 psi
ENGINE
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D170E-5
Type. . . . . . . . . . . . . . . . . . . . . 4-cycle, water-cooled, direct injection
Aspiration . . . . . . . . . . . . . . . . . . Turbocharged, air-to-air aftercooled
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore x stroke . . . . . . . . . . . . . . . . . 170 mm x 170 mm 6.69" x 6.69"
Piston displacement . . . . . . . . . . . . . . . . . . . . . . . 23.15 ltr 1,413 in3
Governor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All-speed, electronic
Horsepower
SAE J1995 . . . . . . . . . . . . . . . . . . . . . . . . Gross 451 kW 605 HP
ISO 9249 / SAE J1349* . . . . . . . . . . . . . . . . . Net 391 kW 525 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391 kW 525 HP
*Net horsepower of this machine is controlled to be constant regardless
of the fan speed.
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 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 9.2 km/h 5.7 mph
3rd 11.8 km/h 7.3 mph 15.8 km/h 9.8 mph
0123 4 567 8 mph
250
x 103lb x 103kg
0
50
100
150
200
DRAWBAR PULL
TRAVEL SPEED
F3 (LOCK UP)
F1 (LOCK UP)
F2 (LOCK UP)
02468 km10 12
0
10
20
30
40
50
60
70
80
90
100
110
F3 (T/C)
F2 (T/C)
F1 (T/C)
D375A-5R
Power Shift
DRAWBAR PULL VS. SPEED
MAXIMUM USABLE PULL
DEPENDS ON TRACTION AND
WEIGHT OF TRACTOR
INCLUDING MOUNTED
EQUIPMENT
Hydraulic
The hydraulic tank is equipped with a high-filtration breather
with pressure valve to help prevent dust from entering.
The fuel tank is equipped with
a high-filtration breather with
pressure valve to help prevent
dust from entering.

12
G
J
I
H
F
E
B
A
C
D
G.L
DOZER EQUIPMENT
Blade capacities are based on the SAE recommended practice J1265.
*Ground pressure shows tractor with cab, ROPS, giant ripper, standard equipment and applicable blade.
DIMENSIONS
SEMI-U DOZER WITH GIANT RIPPER
OPERATING WEIGHT
Tractor weight . . . . . . . . . . . . . . . . . . . . . . . . . . 50720 kg 111,820 lb
Including rated capacity of lubricant, coolant, full fuel tank,
operator, and standard equipment.
Operating weight. . . . . . . . . . . . . . . . . . . . . . . . 68370 kg 150,730 lb
Including Semi-U tilt dozer, giant ripper, cab,
ROPS, operator, standard equipment, rated capacity of
lubricant, coolant, and full fuel tank.
Ground pressure . . . . . . . . . . . . . . . . . 143 kPa 1.46 kg/cm220.8 psi
HYDRAULIC SYSTEM
Hydraulic control unit:
Maximum flow . . . . . . . . . . . . . . . . . . . . 405 ltr/min 107 U.S. gal/min
Relief valve setting. . . . . . . . . . . . . . 20.6 MPa 210 kg/cm22,990 psi
●All-spool control valves are externally mounted on the
hydraulic tank.
●Hydraulic gear pump.
Control valves:
●Two control valves for semi-U tilt dozer and U dozer
Positions: Blade lift . . . . . . . . . . . . . . Raise, hold, lower, and float
Blade tilt. . . . . . . . . . . . . . . . . . . . . Right, hold, and left
●Additional control valve required for ripper
Positions: Ripper lift . . . . . . . . . . . . . . . . . . Raise, hold, and lower
Ripper tilt
(digging angle). . . . . . . Increase, hold, and decrease
Hydraulic cylinders . . . . . . . . . . . . . . . . . . . . . . Double-acting, piston
Hydraulic oil capacity (refill):
Semi-U dozer or U dozer . . . . . . . . . . . . . . 138 ltr 36.5 U.S. gal
Ripper equipment (additional volume):
Giant ripper. . . . . . . . . . . . . . . . . . . . . . . . . . 70 ltr 18.5 U.S. gal
Multi-shank ripper (variable) . . . . . . . . . . . . . 70 ltr 18.5 U.S. gal
Multi-shank ripper (fixed). . . . . . . . . . . . . . . . 44 ltr 11.6 U.S. gal
Number of cylinders Bore
Blade lift 2 150 mm 5.9"
Blade tilt 1 225 mm 8.9"
Ripper lift 2 225 mm 8.9"
Ripper tilt 2 200 mm 7.9"
A2500 mm 8'2" F 10410 mm 34'2"
B4695 mm 15'5" G 3450 mm 11'4"
C4215 mm 13'10" H 1420 mm 4'8"
D2265 mm 7'5" I 1420 mm 4'8"
E3840 mm 12'7" J 4235 mm 13'11"
Ground Clearance: 610 mm 2'0"
Overall Maximum Maximum Maximum Weight
length with Blade Blade lift above drop below tilt Dozer Hydraulic Ground
dozer capacity length x height ground ground adjustment equipment oil Pressure*
143 kPa
Semi-U 7715 mm 18.5 m34695 mm x 2265 mm 1660 mm 715 mm 1065 mm 10860 kg 50 kg 1.46 kgf/cm2
dozer 25'4" 24.2 yd315'5" x 7'5" 5'5" 2'4" 3'6" 23,940 lb 110 lb 20.8 psi
146 kPa
Strengthened 8130 mm 22.0 m35140 mm x 2265 mm 1660 mm 715 mm 1165 mm 12370 kg 50 kg 1.49 kgf/cm2
U dozer 26'8" 28.8 yd316'10" x 7'5" 5'5" 2'4" 3'10" 27,270 lb 110 lb 21.2 psi
144 kPa
Dual tilt 7715 mm 18.5 m34695 mm x 2265 mm 1660 mm 715 mm 1150 mm 11230 kg 60 kg 1.47 kgf/cm2
Semi-U dozer 25'4" 24.2 yd315'5" x 7'5" 5'5" 2'4" 3'9" 24,760 lb 130 lb 20.9 psi
Strengthened 147 kPa
dual tilt 8130 mm 22.0 m35140 mm x 2265 mm 1660 mm 715 mm 1260 mm 12740 kg 60 kg 1.50 kgf/cm2
U dozer 26'8" 28.8 yd316'10" x 7'5" 5'5" 2'4" 4'2" 28,090 lb 130 lb 21.3 psi
D375A-5R
CRAWLER DOZER
●Alternator, 60 ampere/24 V
●Back-up alarm
●Batteries, 170 Ah/2 x 12 V
●Blower fan
●Decelerator pedal
●Dry-type air cleaner with dust evacuator
and dust indicator
●Final drive case wear guard
●Hinged front mask
●Hinged underguard with front pull hook
●Hydraulic track adjusters
●Lighting system (including four front
and two rear lights)
●Lockup torque converter
●Muffler with rain cap
●Palm lever steering control
●Perforated side covers
●Radiator reserve tank
●ROPS brackets
●Segmented sprockets
●Seven-roller track frames
●Shoes, 610 mm 24" extreme service,
single-grouser
●Starting motors, 2 x 7.5 kW/24 V
●Suspension seat
●TORQFLOW transmissions
●Track roller guards
●Warning horn
●Wet steering clutches
STANDARD EQUIPMENT
OPTIONAL EQUIPMENT
●Air conditioner with heater and defroster
●Alternator, 90 ampere/24 V
●Batteries, 200 Ah/2 x 12 V
●Car stereo
●Counterweight
●Cushion push block
●Dual tilt dozer
●Eight-roller track frames
●Fire extinguisher
●Hitch
●Hydraulics for ripper
●Light for ripper point
●Mirror, rearview
●Panel cover
●Pusher plate
●Seat belt
●Shoes:
—710 mm 28"
—810 mm 32"
●Spill guard for Semi-U dozer
●Spill guard for U dozer
●Strengthened Semi-U blade
●Strengthened U blade
●Sun visor
●Seat
Air suspension seat
—Fabric seat
Suspension seat
—Fabric seat
—Fabric seat, high backrest
●Track shoe slip control system
●Vandalism protection kit
●VHMS or VHMS with Orbcomm
ROPS*:
Weight . . . . . . . . . . . . . . . .700 kg 1,540 lb
Roof dimensions:
Width . . . . . . . . . . . . . . . .1980 mm 6'6"
Height from
compartment floor . . . . . .1872 mm 6'2"
*Meets ISO 3471, SAE J/ISO 3471 ROPS
standards.
Steel cab*:
Weight . . . . . . . . . . . . . . . .570 kg 1,260 lb
Dimensions:
Length . . . . . . . . . . . . . . .1875 mm 6'2"
Width . . . . . . . . . . . . . . . .1740 mm 5'9"
Height from compartment,
floor to ceiling . . . . . . . . . .1630 mm 5'4"
*Meets ISO 3449 FOPS standard.
Multi-shank ripper:
Hydraulically controlled parallelogram ripper
with three shanks. Ripping angle available,
stepless adjustable.
Weight (including hydraulic
control unit) . . . . . . . .6720 kg 14,810 lb
Beam length . . . . . . . . . . . .2854 mm 9'4"
Maximum lift above ground .1090 mm 3'7"
Maximum digging depth . . .1170 mm 3'10"
Variable giant ripper:
Variable, parallelogram single-shank
ripper ideal for ripping up tough material.
Ripping angle is variable. Ripping depth is
adjustable in three stages by a hydraulically
controlled pin puller.
13
D375A-5R CRAWLER DOZER
Weight (including hydraulic
control unit) .................5470 kg 12,060 lb
Beam length...........................1367 mm 4'6"
Maximum lift above ground....1420 mm 4'8"
Maximum digging depth.........1420 mm 4'8"

12
G
J
I
H
F
E
B
A
C
D
G.L
DOZER EQUIPMENT
Blade capacities are based on the SAE recommended practice J1265.
*Ground pressure shows tractor with cab, ROPS, giant ripper, standard equipment and applicable blade.
DIMENSIONS
SEMI-U DOZER WITH GIANT RIPPER
OPERATING WEIGHT
Tractor weight . . . . . . . . . . . . . . . . . . . . . . . . . . 50720 kg 111,820 lb
Including rated capacity of lubricant, coolant, full fuel tank,
operator, and standard equipment.
Operating weight. . . . . . . . . . . . . . . . . . . . . . . . 68370 kg 150,730 lb
Including Semi-U tilt dozer, giant ripper, cab,
ROPS, operator, standard equipment, rated capacity of
lubricant, coolant, and full fuel tank.
Ground pressure . . . . . . . . . . . . . . . . . 143 kPa 1.46 kg/cm220.8 psi
HYDRAULIC SYSTEM
Hydraulic control unit:
Maximum flow . . . . . . . . . . . . . . . . . . . . 405 ltr/min 107 U.S. gal/min
Relief valve setting. . . . . . . . . . . . . . 20.6 MPa 210 kg/cm22,990 psi
●All-spool control valves are externally mounted on the
hydraulic tank.
●Hydraulic gear pump.
Control valves:
●Two control valves for semi-U tilt dozer and U dozer
Positions: Blade lift . . . . . . . . . . . . . . Raise, hold, lower, and float
Blade tilt. . . . . . . . . . . . . . . . . . . . . Right, hold, and left
●Additional control valve required for ripper
Positions: Ripper lift . . . . . . . . . . . . . . . . . . Raise, hold, and lower
Ripper tilt
(digging angle). . . . . . . Increase, hold, and decrease
Hydraulic cylinders . . . . . . . . . . . . . . . . . . . . . . Double-acting, piston
Hydraulic oil capacity (refill):
Semi-U dozer or U dozer . . . . . . . . . . . . . . 138 ltr 36.5 U.S. gal
Ripper equipment (additional volume):
Giant ripper. . . . . . . . . . . . . . . . . . . . . . . . . . 70 ltr 18.5 U.S. gal
Multi-shank ripper (variable) . . . . . . . . . . . . . 70 ltr 18.5 U.S. gal
Multi-shank ripper (fixed). . . . . . . . . . . . . . . . 44 ltr 11.6 U.S. gal
Number of cylinders Bore
Blade lift 2 150 mm 5.9"
Blade tilt 1 225 mm 8.9"
Ripper lift 2 225 mm 8.9"
Ripper tilt 2 200 mm 7.9"
A2500 mm 8'2" F 10410 mm 34'2"
B4695 mm 15'5" G 3450 mm 11'4"
C4215 mm 13'10" H 1420 mm 4'8"
D2265 mm 7'5" I 1420 mm 4'8"
E3840 mm 12'7" J 4235 mm 13'11"
Ground Clearance: 610 mm 2'0"
Overall Maximum Maximum Maximum Weight
length with Blade Blade lift above drop below tilt Dozer Hydraulic Ground
dozer capacity length x height ground ground adjustment equipment oil Pressure*
143 kPa
Semi-U 7715 mm 18.5 m34695 mm x 2265 mm 1660 mm 715 mm 1065 mm 10860 kg 50 kg 1.46 kgf/cm2
dozer 25'4" 24.2 yd315'5" x 7'5" 5'5" 2'4" 3'6" 23,940 lb 110 lb 20.8 psi
146 kPa
Strengthened 8130 mm 22.0 m35140 mm x 2265 mm 1660 mm 715 mm 1165 mm 12370 kg 50 kg 1.49 kgf/cm2
U dozer 26'8" 28.8 yd316'10" x 7'5" 5'5" 2'4" 3'10" 27,270 lb 110 lb 21.2 psi
144 kPa
Dual tilt 7715 mm 18.5 m34695 mm x 2265 mm 1660 mm 715 mm 1150 mm 11230 kg 60 kg 1.47 kgf/cm2
Semi-U dozer 25'4" 24.2 yd315'5" x 7'5" 5'5" 2'4" 3'9" 24,760 lb 130 lb 20.9 psi
Strengthened 147 kPa
dual tilt 8130 mm 22.0 m35140 mm x 2265 mm 1660 mm 715 mm 1260 mm 12740 kg 60 kg 1.50 kgf/cm2
U dozer 26'8" 28.8 yd316'10" x 7'5" 5'5" 2'4" 4'2" 28,090 lb 130 lb 21.3 psi
D375A-5R
CRAWLER DOZER
●Alternator, 60 ampere/24 V
●Back-up alarm
●Batteries, 170 Ah/2 x 12 V
●Blower fan
●Decelerator pedal
●Dry-type air cleaner with dust evacuator
and dust indicator
●Final drive case wear guard
●Hinged front mask
●Hinged underguard with front pull hook
●Hydraulic track adjusters
●Lighting system (including four front
and two rear lights)
●Lockup torque converter
●Muffler with rain cap
●Palm lever steering control
●Perforated side covers
●Radiator reserve tank
●ROPS brackets
●Segmented sprockets
●Seven-roller track frames
●Shoes, 610 mm 24" extreme service,
single-grouser
●Starting motors, 2 x 7.5 kW/24 V
●Suspension seat
●TORQFLOW transmissions
●Track roller guards
●Warning horn
●Wet steering clutches
STANDARD EQUIPMENT
OPTIONAL EQUIPMENT
●Air conditioner with heater and defroster
●Alternator, 90 ampere/24 V
●Batteries, 200 Ah/2 x 12 V
●Car stereo
●Counterweight
●Cushion push block
●Dual tilt dozer
●Eight-roller track frames
●Fire extinguisher
●Hitch
●Hydraulics for ripper
●Light for ripper point
●Mirror, rearview
●Panel cover
●Pusher plate
●Seat belt
●Shoes:
—710 mm 28"
—810 mm 32"
●Spill guard for Semi-U dozer
●Spill guard for U dozer
●Strengthened Semi-U blade
●Strengthened U blade
●Sun visor
●Seat
Air suspension seat
—Fabric seat
Suspension seat
—Fabric seat
—Fabric seat, high backrest
●Track shoe slip control system
●Vandalism protection kit
●VHMS or VHMS with Orbcomm
ROPS*:
Weight . . . . . . . . . . . . . . . .700 kg 1,540 lb
Roof dimensions:
Width . . . . . . . . . . . . . . . .1980 mm 6'6"
Height from
compartment floor . . . . . .1872 mm 6'2"
*Meets ISO 3471, SAE J/ISO 3471 ROPS
standards.
Steel cab*:
Weight . . . . . . . . . . . . . . . .570 kg 1,260 lb
Dimensions:
Length . . . . . . . . . . . . . . .1875 mm 6'2"
Width . . . . . . . . . . . . . . . .1740 mm 5'9"
Height from compartment,
floor to ceiling . . . . . . . . . .1630 mm 5'4"
*Meets ISO 3449 FOPS standard.
Multi-shank ripper:
Hydraulically controlled parallelogram ripper
with three shanks. Ripping angle available,
stepless adjustable.
Weight (including hydraulic
control unit) . . . . . . . .6720 kg 14,810 lb
Beam length . . . . . . . . . . . .2854 mm 9'4"
Maximum lift above ground .1090 mm 3'7"
Maximum digging depth . . .1170 mm 3'10"
Variable giant ripper:
Variable, parallelogram single-shank
ripper ideal for ripping up tough material.
Ripping angle is variable. Ripping depth is
adjustable in three stages by a hydraulically
controlled pin puller.
13
D375A-5R CRAWLER DOZER
Weight (including hydraulic
control unit) .................5470 kg 12,060 lb
Beam length...........................1367 mm 4'6"
Maximum lift above ground....1420 mm 4'8"
Maximum digging depth.........1420 mm 4'8"