komatsu D375A-6 SPECIFICATIONS

www.Komatsu.com Printed in Japan 200904 IP. AD (10)

CEN00372-00 Materials and specifications are subject to change without notice

is a trademark of Komatsu Ltd. Japan

HORSEPOWER

Gross: 474 kW

636 HP @ 1800 rpm

Net: 455 kW 610 HP @ 1800 rpm

OPERATING WEIGHT

71640 kg

157,940 lb

Photo may include optional equipment.

D375A-6

C

RAWLER

D

OZER

D

375A

PCCS (Palm Command Control System)

● Electronic controlled PCCS travel control

● Hydraulic controlled PCCS blade/ripper control

● Fuel control dial

● Automatic/manual gearshift selectable mode

● Gearshift pattern preset function

● ECMV controlled transmission

See page 4.

Large TFT LCD monitor

● Easy-to-see and use 7" large multi-color monitor.

● Can be displayed in 10 languages for global support.

TFT : Thin Film Transistor
LCD : Liquid Crystal Display

See page 8.

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
(optional) increases
productivity while
reducing operator
effort.

See page 6.

Automatic transmission with lockup torque
converter increases speed and power to improve fuel

consumption and productivity.

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 (optional):

● 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)

● PCCS (Palm Command Control System) lever

● Pressurized cab (optional)

● Adjustable left armrest

● Travel control console integrated with operator seat

See page 8.

Track shoe slip control system (optional)

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, eight roller undercarriage

provides outstanding grading ability and stability.

W

ALK

-A

ROUND

D375A

-6

HORSEPOWER

Gross: 474 kW 636 HP @ 1800 rpm

Net: 455 kW 610 HP @ 1800 rpm

OPERATING WEIGHT

71640 kg 157,940 lb

BLADE CAPACITY

Semi-U: 18.5 m324.2 yd

3

Full-U: 22.0 m328.8 yd

3

CRAWLER DOZER

D375A-6 C RAWLER D OZER

Hydraulic drive radiator cooling fan

controlled automatically, reduces fuel consumption
and operating noise levels.

See page 6.

ECMV (Electronic Controlled Modulation
Valve)

controlled steering clutch/brake system
facilitates smooth and shockless steering operation.

See page 5.

SAA6D170E-5 turbocharged after-cooled
diesel engine provides an output of 474 kW 636 HP

with excellent productivity. This machine is EPA Tier 3
and EU stage 3A emissions certified.

See page 6.

Human-Machine Interface

Palm command
electronic controlled
travel control joystick

Palm command travel joystick
provides the operator with a
relaxed posture and superb
fine control without operator
fatigue.Transmission gear shifting is simplified with thumb
push buttons.

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 also 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 speed 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 operation

D375A-6 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-6 is greatly improved by numerous new functions.

ECMV (Electronic Controlled Modulation Valve) controlled transmission

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.

ECMV (Electronic Controlled Modulation Valve) controlled steering clutches/brakes

Sensors monitor machine operating conditions, and the controller activates ECMV 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.

Preset travel speed selection function

When the gearshift pattern is set to either <F1­R2>, <F2-R2> or <F2-R3L> in automatic
gearshift mode, the gear is automatically
shifted, reducing round trip repetition work time
and operator's efforts.

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 transmission automatically downshifts to
optimum gear speed to provide high fuel efficiency. This
function provides comfortable operation without manual
downshift and high productivity.

F1-R1 MODE

Automatic
gearshift mode

F1-R2 MODE

F2-R2 MODE

Press DOWN switch

Press DOWN switch

Press UP switch

Press UP switch

F2-R3L MODE

Press DOWN switch

Press UP switch

F1-R1 MODE

Shoe slip control
mode

(optional)

F1-R2 MODE

Press DOWN switch

Press UP switch

F1-R1 MODE

Manual
gearshift mode

F1-R2 MODE

F2-R2 MODE

Press DOWN switch

Press DOWN switch

Press UP switch

Press UP switch

UP

DOWN

Heavy load Light load

Actuated on heavy load
or steep slope

Effect of ECMV steering clutches/brake control

Facing front

When turned 15°

Blade and ripper
control joysticks

Outline of electronic control system

C

ONTROL

F

EATURES

D375A

-6

CRAWLER DOZER

D375A-6 C RAWLER D OZER

UP SHIFT

DOWN SHIFT

LH

R

RH

F

Rear view camere

(Option)

Monitor panel

Fuel
control 
dial

Brake pedal

Electronic
controlled
travel control
lever

Blade control
lever

Ripper control
lever

Electronic Controlled

Clutch pressure

Modulation Valve (ECMV)

Conventional modulation valve

Time

Orbcomm
controller

controller

Fan
motor

VHMS

(Option)

Engine

Fan
pump

Deceleration
pedal

Engine
controller

Lock up
Torque
convertor
control valve

Torque converter

[Komnet]

P/T controller
Transmission control,
Torque converter control,

( )

Steering control

EPC

EPC

Transmission
control valve

ECMV

ECMV

ECMV

ECMV

Electronic controlled
transmission

ECMV

Transmission
output speed
sensor

Auxiliary
valve

Electronic controlled
steering/brake system

W/E controller
(Implement control)

ECMV

ECMV

ECMV

ECMV

Dual tilt and
pitch select
valve
(Option)

Acceleration
sensor
(Option)