HORSEPOWER

Gross: 474 kW 636 HP / 1800 rpm

Net: 455 kW 610 HP / 1800 rpm
OPERATING WEIGHT
70235 kg 154,840 lb

D375A-6R
D
375A

CRAWLER DOZER

Photo may include optional equipment.

 D375A-6R C R AW L E R D O Z E R

WALKCrawler
D375A-5 -AROUND
Dozer

SAA6D170E-5 turbocharged after-cooled Komatsu-integrated design

diesel engine provides an output of 474 kW 636 HP for the best value, reliability, and versatility.
with excellent productivity. This engine is U.S. EPA Tier Hydraulics, power train, frame, and all
2 and EU Stage 2 emissions equivalent. other major components are engineered
See page 6. by Komatsu. You get a machine whose
components are designed to work together
for higher production, greater reliability,
Preventative maintenance and more versatility.
● Centralized Service Station
● Enclosed Hydraulic Piping
● Modular Power Train Design Hydraulic drive radiator cooling fan controlled
● Oil Pressure Checking Ports automatically, reduces fuel consumption and operating noise
See page 9. levels, and the radiator can be easily cleaned by reversible fun.
See page 6.

Automatic transmission with lockup torque

converter increases speed and power to improve fuel
consumption and productivity.
See page 6.

Large blade capacities:

18.5 m3 24.2 yd3 (Semi-U dozer)
and 22.0 m3 28.8 yd3 (U dozer)

Simple hull frame

and monocoque track
frame with pivot shaft for
greater reliability.

The Dual tilt dozer

(optional) increases
productivity while
reducing operator
effort.
See page 6.

Track link design Low-drive, long-track, seven roller undercarriage

reduces maintenance cost by provides outstanding grading ability and stability.
making turning pins easier, with
improved pin reuse. Traction control system (optional)
See page 9. reduces operator fatigue.
See page 7.
2
 CRAWLER DOZER
D375A-6R
HORSEPOWER
Gross: 474 kW 636 HP / 1800 rpm
Hexagonal designed cab includes: Net: 455 kW 610 HP / 1800 rpm
● Spacious interior
● Comfortable ride with cab damper mounting and Komatsu Bogie (K-Bogie) OPERATING WEIGHT
undercarriage 70235 kg 154,840 lb
● Excellent visibility
BLADE CAPACITY
● High capacity air conditioning system (optional) Semi-U: 18.5 m3 24.2 yd3
● Palm Command Control System (PCCS) lever Full-U: 22.0 m3 28.8 yd3
● Pressurized cab (optional)
● Adjustable left armrest
● Travel control console integrated with operator seat
See page 8.

Large Liquid Crystal Display (LCD) monitor Electronic Controlled Modulation Valve
● Easy-to-see and use 7" large multi-color monitor. controlled steering clutch/brake system facilitates
● Can be displayed in 10 languages for global support. smooth and shockless steering operation.
See page 8. See page 5.

Palm Command Control System (PCCS)

● Electronic controlled PCCS travel control
● Hydraulic controlled PCCS blade/ripper control
● Fuel control dial
● Automatic/manual gearshift selectable mode
● Gearshift pattern preset function
● Electronic Controlled Modulation Valve controlled
transmission
See page 4.

Rippers (optional):
● Variable giant
● Multi-shank
See page 7.

Photo may include optional equipment.

Komatsu Bogie (K-Bogie) Extra-low machine profile

undercarriage system High traction, provides excellent machine balance
component durability, and operator comfort. and low center of gravity.
See page 8.

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 D375A-6R C R AW L E R D O Z E R

CONTROL FEATURES
Komatsu’s new ergonomically designed control system “Palm Command Control System
(PCCS)” creates an operating environment with “complete operator control”.

Human-Machine Interface Fuel control dial

Engine speed is controlled by electric signals, providing ease

Palm command of operation eliminating maintenance of linkage and joints.
electronic controlled LH
UP SHIFT Palm command Pressure Proportional Control
travel control joystick
(PPC) controlled blade control joystick
Palm command travel joystick R F
Blade control joystick uses the Blade and ripper
provides the operator with a
DOWN SHIFT RH PPC valve and the same palm control joysticks
relaxed posture and superb
command type joystick as travel
fine control without operator
control joystick. PPC control,
fatigue. Transmission gear shifting is simplified with thumb
combined with the highly
push buttons.
reliable Komatsu hydraulic
Fully adjustable suspension seat and travel control system, provides superb fine
console control. (Dual tilt and pitch
operation are activated by
For improved rear visibility during return part of cycle, the
depressing switch with a thumb. This is available with optional
operator can adjust the seat 15° to the right. The
dual tilt dozer.)
transmission and steering controls move with the seat for
best operator comfort. The travel control console also has Height adjustable blade control armrest
adjustments fore and aft and for height. With an
Blade control armrest is height adjustable without any tools
independently adjustable armrest, each D375A operator
in three stages, providing the operator with firm arm support
can adjust control positions to his individual preference,
and ideal armrest positioning.
providing optimum operational posture for
all operators. Position adjustable ripper control lever
Ripper control lever is position adjustable, providing optimum
Facing front operation posture for all operators during ripping operations
facing front or watching ripper point.

Outline of electronic control system

Electronic
controlled Blade control Ripper control
Rear view camere Fuel travel control lever lever
Monitor panel control Brake pedal lever
(Option)
dial

Deceleration
Orbcomm pedal
controller

[Komnet]

When turned 15° KOMTRAX Plus

controller
P/T controller
W/E controller
(Option)
Engine
controller
(Transmission control,
Torque converter control,
Steering control ) (Implement control)

Transmission Auxiliary
Fan control valve valve Dual tilt and
pump
pitch select
ECMV
ECMV
ECMV
ECMV
ECMV

Lock up
ECMV
ECMV
ECMV
ECMV
EPC
EPC

Torque valve
convertor (Option)
control valve
Acceleration
sensor
Transmission (Option)
Fan
motor output speed
sensor
Electronic controlled Electronic controlled
Engine Torque converter transmission steering/brake system

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 CRAWLER DOZER
D375A-6R
Power Train Electronic Control System
Smooth operation
D375A-6R uses a newly designed power train electronic control system. The controller registers the amount of operator control
(movements of lever and operation of switches) and machine condition signals from each sensor, and calculates to accurately
control torque converter, transmission, steering clutches and brakes for optimized machine operation. The ease of operation
and productivity of the new D375A-6R is greatly improved by numerous new functions.
Electronic Controlled
Electronic Controlled Modulation Valve controlled transmission Modulation Valve (ECMV)
Conventional modulation valve

Clutch pressure
Controller automatically adjusts each clutch engagement depending on travel
conditions such as gear speed, revolution and shifting pattern. This provides
shockless smooth clutch engagement, improved component reliability,
expansion of component life and operator riding comfort. Time

Electronic Controlled Modulation Valve controlled steering clutches/brakes

Sensors monitor machine operating conditions, and the controller activates Electronic Controlled Modulation Valve
electronically to control steering clutches and brakes depending on type of job, such as size of load during dozing, incline angle
of slope or load, providing smooth and ease of operation by reducing counter-steering on downhill travel, etc.

Effect of Electronic Controlled Modulation Valve steering clutches/brakes control

When dozing and turning, Electronic Controlled When dozing downhill, Electronic
Modulation Valve automatically controls stroke Controlled Modulation Valve
ratio of steering clutches and brakes automatically controls steering clutches
depending on degree of load, and brakes depending on incline of
enabling smooth dozing machine or degree of load,
and turning. reducing counter-steering and
producing smooth dozing
operation.

Preset travel speed selection function Automatic Manual Traction control system
gearshift mode gearshift mode mode (optional)
When the gearshift pattern is set to either
UP
F1-R1 MODE F1-R1 MODE F1-R1 MODE
<F1-R2>, <F2-R2> or <F2-R3L> in automatic Press DOWN switch Press UP switch Press DOWN switch Press UP switch Press DOWN switch Press UP switch

F1-R2 MODE F1-R2 MODE F1-R2 MODE

gearshift mode, the gear is automatically Press DOWN switch Press UP switch Press DOWN switch Press UP switch
DOWN
shifted, reducing round trip repetition work time F2-R2 MODE F2-R2 MODE
Press DOWN switch Press UP switch
and operator's efforts. F2-R3L MODE

Heavy load Light load

Auto downshift function

Controller monitors engine speed, travel gear and travel Actuated on heavy load
or steep slope
speed. When load is applied and machine travel speed is
reduced, the transmission automatically downshifts to
optimum gear speed to provide high fuel efficiency. This
function provides comfortable operation without manual
downshift and high productivity.

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 D375A-6R C R AW L E R D O Z E R

PRODUCTIVITY FEATURES
Komatsu Bogie (K-Bogie) undercarriage system
Komatsu Bogie (K-Bogie) undercarriage system combines
prior advantages with additional 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.
● Komatsu Bogie (K-Bogie) oscillate with two fulcrums, and
track roller vertical travel is greatly increased. Impact
loading to undercarriage components is reduced and

Engine component durability is improved since track rollers are

always in contact with track link.
The Komatsu SAA6D170E-5 engine delivers 474 kW 636 HP
at 1800 rpm. The fuel-efficient Komatsu engine, together ● Undercarriage life is improved due to better control of track

with the heavy machine weight, make the D375A-6R a superior chain alignment with track rollers.

crawler dozer in both ripping and dozing production. The ● Riding comfort is improved by reducing vibration and shock
engine is U.S. EPA Tier 2 and EU Stage 2 emissions when traveling over rough terrain.
equivalent, and features direct fuel injection, turbocharger, and
air-to-air change air cooler to maximize fuel efficiency. Fulcrum of major bogie
To minimize noise and vibration, the engine is mounted to the
main frame with rubber cushions.

Hydraulic drive 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
Fulcrum of minor bogie
operating environment.

Automatic transmission with lockup torque Large blade

converter Capacities of 18.5 m3 24.2 yd3 (Semi-U dozer) and
A sharp reduction in fuel consumption and greater power 22.0 m3 28.8 yd3 (U dozer) yield outstanding production.
High-tensile-strength steel comprising the front and sides of
train efficiency is achieved by the new automatic gearshift
the blade increase durability. The shape of the blade features
transmission and lockup torque converter. The automatic
high load hauling efficiency.
gearshift transmission selects the optimal gear range
depending on the working conditions and load placed on Dual tilt dozer (optional)
the machine. This means the machine is always operating The dual tilt dozer increases productivity while reducing
at maximum efficiency. (Manual gearshift mode is operator effort.
selectable with a switch)
● Optimum blade cutting angle for all types of materials
Engine Torque Transmission and grades can be selected on-the-go for increased load
converter
and production.

Lockup “OFF”
● 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.
Lockup “ON”

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 CRAWLER DOZER
D375A-6R
Rippers (optional)
● 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.

Automatic/manual gearshift selectable mode

Automatic or manual gearshift modes can be selected with ease to suit the work at hand by simply pressing the switch on the
LCD monitor (The mode can be selected when the travel control joystick is at NEUTRAL.).
● Automatic gearshift mode
The mode for general dozing. When a load is applied, the gear automatically shifts down, and when the load is off,
it automatically shifts up to a set maximum gear speed. This mode economizes both fuel and production where the torque
converter lockup mechanism is actuated according to load, automatically selecting the optimum gear speed.
● Manual gearshift mode
The mode for dozing and ripping rough ground. When loaded, the gear automatically shifts down, but does not shift up when
the load is off.

Working mode
This mode can be set to either “P mode” for the maximum power or “E mode” for energy saving operation. Combined with the
automatic gearshift mode or manual gearshift mode, the working mode allows the operator to select the optimum machine
operating condition for the work at hand. (The mode can be switched during operation.)
● P Mode (Power mode) Working mode
With P mode, the engine outputs its full power. Select this mode for the selector switch
work requiring large production, heavy-load work, and uphill work.
● E Mode (Economy mode)
Select for energy saving operation with restricted engine power output. P mode
Select for the work on a ground where the machine may cause shoe slip
and frequent decelerator pedal operation is required.
Select for the work not requiring large power such as downhill dozing,
leveling, and light-load work.

Traction control system in bulldozer (optional) E mode

● Eliminates the need for the operator to constantly control engine power output with the decelerator pedal 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 traction control system will contribute to lower fuel costs, because the engine output is automatically controlled to
optimum levels for operation.

Gearshift mode Automatic Manual Traction control

selector switch gearshift gearshift system mode
mode screen mode screen screen (optional)

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 D375A-6R C R AW L E R D O Z E R

WORKING ENVIRONMENT

Photo may include optional equipment.

Photo may include optional equipment.

Hexagonal pressurized cab Comfortable ride with cab damper mounting

and Komatsu Bogie (K-Bogie) undercarriage
● The cab’s hexagonal design and large tinted glass
D375A-6R’s cab mount uses a cab damper mounting which
windows provide excellent front, side and rear visibility. further improves viscous damper and provides excellent
● Air filters and a higher internal air pressure combine to shock and vibration absorption capacity with its long stroke.
prevent dust from entering the cab. The cab damper mounting, combined with Komatsu Bogie
(K-Bogie) undercarriage, softens shocks and vibrations
Fresh air intake from rear of engine hood while traveling over adverse condition that are impossible
to absorb with conventional cab mounting methods.
The air conditioner air intake port is now located at the rear The soft spring cab damper isolates the cab from machine
of the engine hood where there is minimal dust. As a result, body, suppressing vibrations and providing a quiet,
the air inside the cab is always clean. Cleaning interval comfortable operating environment.
of the filter is greatly extended, and use of a new structure
Cab damper mounting
filter element facilitates cleaning and replacement.
Rubber Boot
Large LCD color monitor Rubber

A large user-friendly color monitor enables safe, accurate

and smooth work. Improved screen visibility is achieved by
use of LCD that can easily be read at various angles and Silicon Oil
lighting conditions. Simple and easy to operate switches.
Industry first function keys facilitate multi-function operations. Spring
Display data in 10 languages to globally support operators
around the world. New Air-Suspension seat (Optional)
D375A-6R uses a new suspension seat as option. The
large sized and thick seat cushion provides excellent
support and riding comfort for all operators.
In addition, seat heater and ventilation system also
Indicators provides greater comfortable working environment.

Function
switches

Basic operation
switches

Extra switches

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 CRAWLER DOZER
D375A-6R

EASY MAINTENANCE
Preventative Maintenance
Preventative maintenance is the only way to ensure long service life from your equipment. That’s why Komatsu designed the
D375A-6R with conveniently located maintenance points to make necessary inspections and maintenance quick and easy.

LCD monitor with troubleshooting function to Centralized service station

prevent critical machine troubles To ensure convenient maintenance, the transmission
Various meters, gauges, and warning functions are centrally and torque converter oil filters are both arranged next to
arranged on the LCD monitor. Offers ease of start-up the power train oil level gauge.
inspection and promptly warns the operator with a lamp and
buzzer if any abnormalities should occur. In addition, Oil pressure checking ports
countermeasures are indicated in 4 stage codes to ensure Pressure checking ports for power train components are
safety and prevent the machine from major problems. centralized to promote quick and simple diagnosis.
Replacement times for oil and filters are also indicated.
Enlarged engine room
Maintenance warning screen 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
Abnormality warning Maintenance List screen repairability.
screen for replacement time
display Easy radiator cleaning with hydraulic drive fan
The radiator can be cleaned by utilization of the reversible,
hydraulically driven cooling fan. The fan can be reversed from
inside the cab by simply turning the switch to reverse.

Low Maintenance Costs

Track link with wedge ring increase mechanical strength, provide longer life, and
protect the system from damage.
D375A-6R track links feature
Pin press fitting
reduced press-fit force and a force +
wedge ring Flat face O-ring seals
holding force
wedge ring. Conventional track Flat face O-ring seals are used to securely seal all
pins are retained only with a large hydraulic hose connections and to prevent oil leakage.
press-fit force. The track link
divides pin forces between the Track
Enclosed hydraulic piping
guiding
wedge ring and press-fit force. guard Hydraulic piping for the blade tilt cylinder is completely
This results in easier service with housed in the push arm protecting it from damage.
reduced pin damage when turning Wedge ring

pins and bushings. The result is Modular power train design

improved undercarriage life and reduced maintenance cost Power train components are sealed in a modular design
through reduced wear, greater pin reusability, and reduced that allows the components to be dismounted and mounted
maintenance man-hours. without oil spillage, making servicing work clean, smooth,
Highly reliable electric circuit and easy.
The electrical circuit reliability is increased by utilizing dust,
Maintenance-free disc brakes
vibration and corrosion resistant "Sealed connectors". The
reinforced electrical wiring harnesses include a circuit Wet disc brakes require less maintenance.
breaker and are covered with a heat-resistant material to

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 D375A-6R C R AW L E R D O Z E R

RELIABILITY FEATURES
Filtration
Engine The fuel tank is equipped with
Newly high efficient main fuel filter and water separator help a high-filtration breather with
protect the engine against dust and water in the fuel. pressure valve to help prevent
dust from entering.

Hydraulic
The hydraulic tank is equipped with a high-filtration breather
with pressure valve to help prevent dust from entering.

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 CRAWLER DOZER
D375A-6R

SPECIFICATIONS
ENGINE STEERING SYSTEM

Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D170E-5 Palm Command Control System, joystick controlled, wet multiple-
Type. . . . . . . . . . . . . . . . . . . . . 4-cycle, water-cooled, direct injection disc steering clutches are spring-loaded and hydraulically released.
Aspiration . . . . . . . . . . . . . Turbocharged, air-to-air change air cooler Wet multiple-disc, pedal/lever controlled steering brakes are spring-
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 actuated hydraulically released and require no adjustment. Steering
Bore x stroke . . . . . . . . . . . . . . . . . 170 mm x 170 mm 6.69" x 6.69" clutches and brakes are interconnected for easy, responsive steering.
Piston displacement . . . . . . . . . . . . . . . . . . . . . . . 23.15 ltr 1,413 in3
Minimum turning radius . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 m 13'9"
Governor . . . . . . . . . . . . . . . . . . All-speed and mid-range, electronic
Horsepower
SAE J1995 . . . . . . . . . . . . . . . . . . . . . . . . Gross 474 kW 636 HP
UNDERCARRIAGE
ISO 9249 / SAE J1349* . . . . . . . . . . . . . . . . . Net 455 kW 610 HP
Rated rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1800 rpm Suspension . . . . . . . . . . . . . Oscillating equalizer bar and pivot shaft
Fan drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic Track roller frame. . . . . . . . . . . . . . . Cylindrical, high-tensile-strength
Lubrication system steel construction
Method . . . . . . . . . . . . . . . . . . . . . . . Gear pump, force lubrication Rollers and idlers. . . . . . . . . . . . . . . . . . . . . . Lubricated track rollers
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full-flow
*Net horsepower at the maximum speed of Komatsu Bogie (K-Bogie) undercarriage
radiator cooling fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433 kW 580 HP Lubricated track rollers are resiliently mounted to the track
U.S. EPA Tier 2 and EU Stage 2 emissions equivalent. 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
TORQFLOW TRANSMISSION
abrasives into pin to bushing clearances to provide extended
Komatsu TORQFLOW transmission consists of a water-cooled, service life. Track tension is easily adjusted with grease gun.
3-element, 1-stage, 1-phase torque converter with lockup clutch
Number of shoes (each side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
and a planetary gear, multiple-disc clutch transmission which is
Grouser height:
hydraulically actuated and force-lubricated for optimum heat
Single grouser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 mm 3.7"
dissipation. Gearshift lock lever and neutral safety switch
Shoe width (standard) . . . . . . . . . . . . . . . . . . . . . . . . . . 610 mm 24"
prevent accidental starts.
Ground contact area . . . . . . . . . . . . . . . . . . . . . 46850 cm2 7,262 in2
Ground pressure (tractor) . . . . . . . . . . 108 kPa 1.10 kg/cm2 15.6 psi
Gear Forward Reverse
Number of track rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1st 3.5 km/h 2.2 mph 4.6 km/h 2.9 mph Number of carrier rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
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 Extreme Additional Ground Ground
3rd 11.8 km/h 7.3 mph 15.8 km/h 9.8 mph service shoes weight contact area pressure
US ton kN ton 125 kPa
130
120 710 mm 660 kg 54530 cm2
1.27 kgf/cm2
1100 D375A-6R 28" 1,460 lb 8,452 in2
120 110 18.1 psi
Power Shift
1000 110 kPa
110 100
DRAWBAR PULL VS. SPEED 810 mm 1330 kg 62210 cm2
MAXIMUM USABLE PULL 1.12 kgf/cm2
100 900 32" 2,930 lb 9,643 in2
90
DEPENDS ON TRACTION AND 15.9 psi
90 800
WEIGHT OF TRACTOR
80
INCLUDING MOUNTED
80 700
EQUIPMENT COOLANT AND LUBRICANT
Drawbar Pull

70
F1
70
600
CAPACITY (REFILL)
60
60 Automatic
500 gearshift mode Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . .1200 ltr 317.0 U.S. gal
50
F1
Manual Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 ltr 31.7 U.S. gal
50 gearshift mode
F2
400 40 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 ltr 22.7 U.S. gal
40
Torque converter, transmission,
300 30
30 bevel gear, and steering system . . . . . . . . .150 ltr 39.6 U.S. gal
F3 F2
200 20
Final drive (each side) . . . . . . . . . . . . . . . . . . . .65 ltr 17.1 U.S. gal
20

10 100 10 F3
F3L
0 0 0
0 2 4 6 8 10 12 14 km/h

0 1 2 3 4 5 6 7 8 mph

Travel Speed

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.

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 D375A-6R C R AW L E R D O Z E R

DIMENSIONS

SEMI-U DOZER WITH GIANT RIPPER

A 2500 mm 8'2"
B 4775 mm 15'5"
C 4215 mm 13'10"
D 2265 mm 7'5"
E 3840 mm 12'7" C J
F 10515 mm 34'6"
D
G 3450 mm 11'4"
I
H 1538 mm 5'1" G.L
I 1050 mm 3'5"
J 4235 mm 13'11" A E G H
B F

Ground Clearance: 610 mm 2'0"

OPERATING WEIGHT

Tractor weight . . . . . . . . . . . . . . . . . . . . . . . . . . 51800 kg 114,200 lb Operating weight. . . . . . . . . . . . . . . . . . . . . . . . 70235 kg 154,840 lb

Including rated capacity of lubricant, coolant, full fuel tank, Including Semi-U dozer, giant ripper, cab, ROPS (ISO 3471),
operator, and standard equipment. operator, standard equipment, rated capacity of lubricant, coolant,
and full fuel tank.
Ground pressure . . . . . . . . . . . . . . . . . 147 kPa 1.50 kg/cm2 21.3 psi

HYDRAULIC SYSTEM

Hydraulic control unit: Hydraulic cylinders . . . . . . . . . . . . . . . . . . . . . . Double-acting, piston

Closed-center load sensing system (CLSS) designed for precise and
responsive control, and for efficient simultaneous operation.
Number of cylinders Bore
Hydraulic control unit: Blade lift 2 140 mm 5.5"
All spool control valves externally mounted beside the hydraulic tank. Blade tilt 1 200 mm 7.9"
Variable piston pump with capacity (discharge flow) of
Ripper lift 2 200 mm 7.9"
366 ltr/min 96.7 U.S. gal/min for imlement at rated engine rpm.
Relief valve setting . . . for implement 27.5 MPa 280 kg/cm2 3,980 psi Ripper tilt 2 180 mm 7.1"

Control valves:
Hydraulic oil capacity (refill):
Spool control valve for Semi-U dozer and U dozer.
Semi-U dozer or U dozer . . . . . . . . . . . . . . 130 ltr 34.4 U.S. gal
Positions: Blade lift . . . . . . . . . . . . . . . Raise, hold, lower, and float
Ripper equipment (additional volume):
Blade tilt . . . . . . . . . . . . . . . . . . . . . Right, hold, and left
Giant ripper. . . . . . . . . . . . . . . . . . . . . . . . . . 45 ltr 11.9 U.S. gal
Additional control valve required for variable digging angle Multi-shank ripper (variable) . . . . . . . . . . . . . 45 ltr 11.9 U.S. gal
multi-shank ripper and giant ripper.
Positions: Ripper lift . . . . . . . . . . . . . . . . . . Raise, hold, and lower
Ripper tilt . . . . . . . . . . . . . Increase, hold, and decrease

DOZER EQUIPMENT

Blade capacities are based on the ISO 9246.

Overall Blade Maximum Maximum Maximum Weight

length with Blade length x height lift above drop below tilt Dozer Hydraulic Ground
dozer capacity (with spill guard height) ground ground adjustment equipment oil Pressure*
147 kPa
Semi-U 7820 mm 18.5 m3 4775 mm x 2265 mm 1642 mm 800 mm 970 mm 10920 kg 45 kg
1.50 kgf/cm2
dozer 25'8" 24.2 yd3 15'5" x 7'5" 5'5" 2'7" 3'2" 24,070 lb 100 lb
21.3 psi
148 kPa
Strengthened 7820 mm 18.5 m3 4775 mm x 2265 mm 1642 mm 800 mm 970 mm 11390 kg 45 kg
1.51 kgf/cm2
Semi-U dozer 25'8" 24.2 yd3 15'5" x 7'5" 5'5" 2'7" 3'2" 25,110 lb 100 lb
21.5 psi
Strengthened 150 kPa
8180 mm 22.0 m3 5140 mm x 2265 mm (2525 mm) 1642 mm 800 mm 1065 mm 12420 kg 45 kg
U dozer 1.53 kgf/cm2
25'10" 28.8 yd3 16'10" x 7'5" (8'3") 5'5" 2'7" 3'6" 27,380 lb 100 lb
with spill guard 21.8 psi
147 kPa
Semi-U dozer 7820 mm 18.5 m3 4775 mm x 2265 mm 1642 mm 800 mm 1185 mm 11100 kg 50 kg
1.50 kgf/cm2
(Dual tilt spec.) 25'8" 24.2 yd3 15'5" x 7'5" 5'5" 2'7" 3'11" 24,470 lb 110 lb
21.3 psi
Strengthened 148 kPa
7820 mm 18.5 m3 4775 mm x 2265 mm 1642 mm 800 mm 1185 mm 11570 kg 50 kg
Semi-U dozer 1.51 kgf/cm2
25'8" 24.2 yd3 15'5" x 7'5" 5'5" 2'7" 3'11" 25,510 lb 110 lb
(Dual tilt spec.) 21.5 psi
Strengthened 151 kPa
8180 mm 22.0 m3 5140 mm x 2265 mm (2525 mm) 1642 mm 800 mm 1300 mm 12600 kg 50 kg
U dozer with spill guard 25'10" 1.54 kgf/cm2
28.8 yd3 16'10" x 7'5" (8'3") 5'5" 2'7" 4'3" 27,780 lb 110 lb
(Dual tilt spec.) 21.9 psi
*Ground pressure shows tractor with cab, ROPS (ISO 3471), variable giant ripper, standard equipment and applicable blade.
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 CRAWLER DOZER
D375A-6R

STANDARD EQUIPMENT

● Alternator, 60 ampere/24 V ● Hinged underguards with front pull hook ● Radiator reserve tank
● Back-up alarm ● Horn, warning ● ROPS (ISO 3471) brackets
● Batteries, 170 Ah/2 x 12 V ● Hydraulics for dozer ● Segmented sprockets
● Blower cooling fan ● Hydraulic track adjusters ● Seven track roller
● Color monitor ● Lighting system (including four front ● Shoes, 610 mm 24" extreme service,
● Decelerator pedal and two rear lights) single-grouser
● Dry-type air cleaner with dust evacuator ● Lockup torque converter ● Starting motors, 2 x 7.5 kW/24 V
and dust indicator ● Muffler with rain cap ● Suspension seat
● Electrical dust indicator ● Palm Command Control System (PCCS) ● TORQFLOW transmissions
● Final drive case wear guard for travel/steering and blade/ripper control ● Track roller guards
● Hinged front mask ● Perforated side covers ● Wet steering clutches

OPTIONAL EQUIPMENT

● Air conditioner with heater and defroster ● Inspection light ● Shoes:

● Alternator, 90 ampere/24 V ● Light for ripper point —710 mm 28"
● AM/FM radio ● Lunch box holder —810 mm 32"
● Batteries, 200 Ah/2 x 12 V ● Mirror, rearview ● Spare parts for first service
● Counterweight ● Panel cover ● Spill guard for Semi-U dozer
● Double wiper for cab door ● Rear view monitoring system ● Starting motors, 2x11kw/24V
● Dual tilt dozer ● Seat ● Strengthened Semi-U dozer
● End bits Air suspension seat ● Strengthened U dozer with spill guard
—Efficiency type —Fabric seat ● Sun visor
● Fast fill fuel system Air suspension seat with ● Tool kit
● Fire extinguisher —Large sized and thick fabrick seat ● Traction control system in bulldozer
● LED lights —Seat heater ● Vandalism protection kit (cover locks)
● High mount head lights —Ventilation ● KOMTRAX or Plus with Orbcomm
● Hitch ● Seat belt
● Hydraulics for ripper

ROPS*: Multi-shank ripper: Variable giant ripper:

Weight . . . . . . . . . . . . . . . . 700 kg 1,540 lb Hydraulically controlled parallelogram ripper Variable, parallelogram single-shank
Roof dimensions: with three shanks. Ripping angle is ripper ideal for ripping up tough material.
Width . . . . . . . . . . . . . . . . 1980 mm 6'6" steplessly adjustable. Ripping angle is variable. Ripping depth is
Height from adjustable in three stages by a hydraulically
Weight (including hydraulic control unit
compartment floor . . . . . . . 1872 mm 6'2" controlled pin puller.
and oil) . . . . . . . . . . . .6800 kg 14,990 lb
*Meets ISO 3471 ROPS standards.
Beam length . . . . . . . . . . . . .2910 mm 9'7" Weight (including hydraulic control unit
Steel cab*: Maximum lift above ground . .1082 mm 3'7" and oil).........................6200 kg 13,670 lb
Weight . . . . . . . . . . . . . . . . 570 kg 1,260 lb Maximum digging depth . . .1190 mm 3'11" Beam length ...........................1453 mm 4'9"
Dimensions: Maximum lift above ground....1050 mm 3'5"
Length . . . . . . . . . . . . . . . 1875 mm 6'2" Maximum digging depth.........1538 mm 5'1"
Width . . . . . . . . . . . . . . . . 1740 mm 5'9"
Height from compartment
floor to ceiling . . . . . . . . . . 1630 mm 5'4"
*Meets ISO 3449 FOPS standard.

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CEN00392-01 Materials and specifications are subject to change without notice

is a trademark of Komatsu Ltd. Japan