komatsu D275A-5R SPECIFICATIONS

www.Komatsu.com Printed in Japan 200801 IP.AD (10)

CEN00228-01

Materials and specifications are subject to change without notice.

is a trademark of Komatsu Ltd. Japan.

HORSEPOWER

Gross: 337 kW

452 HP @ 2000 rpm

Net: 335 kW 449 HP @ 2000 rpm

OPERATING WEIGHT

50850 kg

112,100 lb

D275A-5R

Photo ma

y include optional equipment.

275A

RAWLER

OZER

Simple hull frame

and monocoque track frame with pivot shaft for greater reliability.

Large blade capacities:

13.7 m317.9 yd3(Semi-U dozer) ,

16.6 m321.7 yd3(U dozer)

and

14.6 m319.1 yd3(SIGMADOZER)

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.

Extra-low machine profile provides excellent machine

balance and low center of gravity.

Preventative maintenance

● Centralized service station

● Enclosed hydraulic piping

● Modular power train design

● Oil pressure checking ports

● Electric priming pump

See page 9.

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 6.

D275AX-5

CRAWLER DOZER

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 controls

● Optional pressurized cab

● Adjustable armrest

● Travel control console integrated with operator seat

See page 8.

Low-drive, long-track, seven roller undercarriage

ensures outstanding grading ability and stability.

Track shoe slip control system (option)

See page 7.

Photo may include optional equipment.

Hydraulic driven radiator cooling fan

controlled automatically, reduces fuel consumption and operating noise levels.

See page 6

ALK

-A

ROUND

D275A

-5R

CRAWLER DOZER

D275A-5R C RAWLER D OZER

HORSEPOWER

Gross: 337 kW 452 HP @ 2000 rpm

Net: 335 kW 449 HP @ 2000 rpm

OPERATING WEIGHT

50850 kg 112,100 lb

BLADE CAPACITY

Semi-U: 13.7 m317.9 yd

Full-U: 16.6 m321.7 yd

SAA6D140E-5 turbocharged after-cooled diesel engine provides an output of 335 kW 449 HP

with excellent productivity. See page 6.

Filtration

Further enhanced reliability of the machine against fuel contamination thanks to the improvement in fuel filtration.

See page 10.

Electronic Controlled Modulation Valve (ECMV)

controlled steering clutches/brakes facilitating steering operation.

See page 5.

Power Train Electronic Control System

Smooth and soft operation

D275A-5R utilizes 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 calculate

accurately the control of the transmission, steering clutches and brakes for optimal machine operation. The ease of

operation and productivity of new D275A-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, revolution and shifting pattern. This provides smooth shockless 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 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.

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.)

Heavy load

Light load

Actuated on heavy load or steep slope

Palm command electronic controlled travel control joystick

Palm command travel joystick

provides the operator with a

relaxed posture and superb

fine control. Transmission gear

shifting is simplified with thumb

push buttons.

Full-adjustable suspension seat and travel control console

For improved rear visibility during reverse operations, the

operator can adjust seat 15° to the right. The transmission

and steering controls move with the seat for optimum

operator comfort. The travel control console also has

adjustment fore and aft, and height. The armrest is

independently adjustable up and down, providing optimum

operation posture for all operators.

Palm command PPC controlled blade control joystick

Blade control joystick uses the

Proportional Pressure Control

(PPC) valve and palm

command joystick similar to the

travel control joystick.

PPC control combined with the

highly reliable Komatsu hydraulic system enables superb

fine control. (Dual tilt and pitch operation are enabled by

depressing switch with a thumb. This is available when

optional dual tilt dozer is installed.)

Fuel control dial

Engine revolution is controlled by electric signals, providing

ease of operation, eliminating maintenance of linkage and

joints.

Height adjustable blade control armrest

Blade control armrest is height adjustable without any tools

in three stages, providing the operator with firm arm

support in an ideal armrest.

Position adjustable ripper control lever

Ripper control lever position is adjustable, providing optimum

operator posture during all types of ripping operations.

MONITOR SYSTEM

Electronic controlled steering/brake system

ECMV

Auxiliary valve

Tra v el control lever

Steering controller

Fuel control dial

Monitor panel

Deceleration pedal

Transmission controller

Engine controller

Electronic controlled transmission

Engine

Fuel control valve unit

ECMV

Brake pedal potentiometer

Pitch angle sensor

Transmission output speed sensor

Auto shift down switch

Switch

Transmission control

Transmission control valve

Water temp.

Engine oil pressure

Engine speed

Tor que converter

Komatsu’s ergonomically designed control system “PCCS” creates an operating environment with

“complete operator control”.

Left-hand joystick

Blade and ripper control joystick

Outline of electronic control system

Human-machine Interface

PALM COMMAND CONTROL SYSTEM (PCCS)

D275A

-5R

CRAWLER DOZER

D275A-5R C RAWLER D OZER

Preset travel speed 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.

Facing front

When turned 15°

Effect of ECMV steering clutches/brake control

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.

Clutch pressure

Electronic Controlled Modulation Valve (ECMV)

Conventional modulation valve

Time

DOWN

F1-R1 MODE

Press DOWN switch

F1-R2 MODE

Press DOWN switch

F2-R2 MODE

Press UP switch

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