komatsu D155A-6 SPECIFICATIONS

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www.Komatsu.com Printed in Japan 200905 IP.SIN.AD (10)

CEN00255-02 Materials and specifications are subject to change without notice

is a trademark of Komatsu Ltd. Japan

HORSEPOWER

Gross: 268 kW

360 HP @ 1900 rpm

Net: 264 kW 354 HP @ 1900 rpm

OPERATING WEIGHT

41700 kg

91,930 lb

BLADE CAPACITY

Semi-U DOZER: 9.4 m

12.3 yd

CRAWLER DOZER

Photo may include optional equipment.

D155A-6

155A

●

Air cleaner, double element with dust indicator

● Alternator, 60 ampere

● Backup alarm

● Batteries, 2 x 12V 170 Ah

● Blower cooling fan

● Color monitor

● Decelerator pedal

● Electric priming pump

● Fenders

● Horn, warning

● Hydraulics for dozer

● Lighting system (includes 2 front, 1 rear)

● Muffler with rain cap

● Open ROPS

● Palm lever steering control

● Radiator with reserve tank

● Rear cover

● Starting motor, 11kW/24V

● Suspension seat

● Tr ack roller guard, end sections

● Tr ack shoe assembly

– Sealed and lubricated track

● Underguards, oil pan and transmission

● 560 mm 22" single grouser shoe

STANDARD EQUIPMENT FOR BASE MACHINE

ROPS cab

● Additional weight: 430 kg 948 lb

● All-weather, enclosed pressurized cab

● Dimensions:

—Length:

1735 mm 5'8"

—Width:

1755 mm 5'9"

—Height from floor: 1635 mm 5'4"

● Meets ISO 3471, SAE J/ISO 3471 ROPS standards, and ISO 3449 FOPS standard.

Variable multi-shank ripper

● Additional weight (including hydraulic control unit): 3760 kg 8,290 lb

● Beam length: 2320 mm 7'7"

● Hydraulically-controlled parallelogram-type ripper with three shanks.

Digging angle infinitely adjustable. Standard digging angle: 45°

● Maximum digging depth: 900 mm 2'11"

● Maximum lift above ground: 950 mm 3'1"

Variable giant ripper

● Additional weight (including hydraulic control unit): 3380 kg 7,450 lb

● Beam length: 1410 mm 4'8"

● Hydraulically-controlled parallelogram-type ripper with one shank.

Digging angle infinitely adjustable. Standard digging angle: 45°

● Maximum digging depth: 1370 mm 4'6"

● Maximum lift above ground: 945 mm 3'1"

Shoes

Other

● Air conditioner

● Cab heater and defroster

● Engine side cover

● Large pre-cleaner

● Locks, filler caps and covers

● Rear view monitoring system

● Rigid drawbar

● Tool kit

OPTIONAL EQUIPMENT

Shoes (optional) Additional weight Ground contact area

560 mm

22"

single-grouser shoes -0 kg -0 lb 35280 cm25,468 in

610 mm 24" single-grouser shoes +200 kg +440 lb 38430 cm25,957 in

660 mm 26" single-grouser shoes +410 kg +900 lb 41580 cm26,445 in

710 mm 28" single-grouser shoes +610 kg +1,340 lb 44730 cm26,933 in

560 mm 22" extreme service shoes +450 kg +990 lb 35280 cm25,468 in

610 mm 24" extreme service shoes +690 kg +1,520 lb 38430 cm25,957 in

660 mm 26" extreme service shoes

+920 kg +2,030 lb 41580 cm26,445 in

SIGMADOZER

Overall length Blade Blade Maximum lift

Maximum drop

Maximum tilt Additional

with dozer capacity length x height above ground below ground adjustment weight

SIGMADOZER

6125 mm 9.4 m34060 mm x 1850 mm 1320 mm 617 mm 920 mm 4940 kg

20'1" 12.3 yd

13'4" x 6'1" 4'4" 2' 3' 10,890 lb

Strengthened

6125 mm 9.4 m34060 mm x 1850 mm 1320 mm 617 mm 920 mm 5360 kg

SIGMADOZER 20'1" 12.3 yd

13'4" x 6'1" 4'4" 2' 3' 11,820 lb

SIGMADOZER

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ALK

-A

ROUND

D155A-6

CRAWLER DOZER

D155A-6

C RAWLER D OZER

Photo may include optional equipment.

SAA6D140E-5 turbocharged aftercooled diesel engine provides an output of

264 kW 354 HP with excellent productivity.

See page 5.

Hydraulic drive radiator cooling fan controlled

automatically, reduces fuel consumption and operating noise levels.

See page 5.

Gull-wing engine side covers for easy and efficient

engine servicing.

See page 8.

Blade tilt lines

completely protected.

See page 8.

Low drive, rugged undercarriage

outstanding durability even traveling over severe rocky terrain.

See page 5.

Extra-low machine profile provides

excellent machine balance and low center of gravity.

Torque converter

having ample powertransmitting capacity in reserve.

See page 4.

Modular power train for increased

serviceability and durability. Forward mounted pivot shafts isolate final drives from blade loads.

See page 8.

Wet disc brakes require less maintenance.

See page 8.

Filtration

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

See page 9.

High-rigidity, simple hull frame and

monocoque track frame with pivot shaft for greater reliability.

See page 8.

Automatic transmission increases

speed and power to improve productivity.

See page 4.

Large blade capacity:

9.4 m312.3 yd3(Semi-U dozer)

and

11.9 m315.6 yd3(U dozer)

See page 4.

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 (Electronic Controlled Modulation Valve)

controlled transmission

See page 6.

New integrated ROPS cab includes:

● Large quiet operator environment

● Comfortable ride with new cab damper

● Excellent visibility without ROPS post

● Two-position seat

● High capacity air conditioning system

(optional)

● Pressurized cab (optional)

● Adjustable armrests and suspension seat

(optional)

See page 7.

Large TFT LCD monitor

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

● Can be displayed in 10 languages for global support

● Advanced monitoring system for early troubleshooting

TFT : Thin Film Transistor LCD : Liquid Crystal Display

See page 7.

Rippers (optional):

● Variable multi-shank

● Variable giant

Newly designed ripper offers excellent ripper visibility and dynamic ripping operation.

See page 4.

HORSEPOWER

Gross: 268 kW 360 HP @ 1900 rpm

Net: 264 kW 354 HP @ 1900 rpm

OPERATING WEIGHT

41700 kg 91,930 lb BLADE CAPACITY

Semi-U DOZER: 9.4 m312.3 yd

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WA380-6

RODUCTIVITY

EATURES

D155A-6

CRAWLER DOZER

D155A-6

C RAWLER D OZER

Automatic transmission with torque converter

Greater power train efficiency is achieved by the new automatic gearshift transmission.The automatic gearshift transmission selects the optimal gear range depending on the working conditions and load placed on the machine. This means the machine is always operating at maximum efficiency. (Manual gearshift mode is selectable with a switch)

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 multi-monitor (selection 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 automatically selects 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.

Large blade capacity

Capacity of 9.4 m312.3 yd3(Semi-U dozer) and 11.9 m

21.7 yd3(U dozer) yield outstanding production. High-

tensile-strength steel is incorporated into the front and sides of the blade for increased durability.

Automatic gearshift mode screen

Manual gearshift mode screen

Fuel-efficient electronic controlled engine

The Komatsu SAA6D140E-5 engine delivers 264 kW 354 HP at 1900 rpm. The fuel-efficient, powerful Komatsu engine makes the D155A superior in both ripping and dozing operations. The engine is turbocharged and features direct fuel injection and air-to-air aftercooling to maximize power. To minimize noise and vibration, the engine is mounted to the main frame with rubber cushions.

Hydraulic driven engine 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.

Engine

Field-proven low-drive, rigid type undercarriage

Komatsu’s unique low-drive undercarriage features less shoe slippage compared with other types of undercarriage. The undercarriage follows the ground firmly for increased drawbar pull. Large strengthened shoes have been proven to be highly durable in various job sites all over the world.

Length of track on ground:

3150 mm (10’4’’)

Undercarriage

Radiator

Fan drive hydraulic motor

Controller

Power train oil temperature sensor

Coolant temperature sensor

Hydraulic pump

Ripper performance

Ripper cylinders are reduced from four to two, greatly improving rear visibility during ripping. Also, expanded ripper movement offers a wider range of operation.

G.L

D155A-6

Ripper point penetration area

D155A-2

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WA380-6

ONTROL

EATURES

D155A-6

CRAWLER DOZER

D155A-6

C RAWLER D OZER

ORKING

NVIRONMENT

Palm command PPC controlled blade/ripper control joystick

Blade control joystick uses a PPC (Proportional Pressure Control) valve and blade control joystick ergonomics are similar to the travel control joystick. PPC control combined with the highly reliable Komatsu hydraulic system enables superb fine control.

Fuel control dial

Engine revolution is controlled by an electronic signal, providing ease of operation, eliminating maintenance of linkage and joints.

Height adjustable armrest (Optional)

Armrest is height adjustable without any tools, providing the operator with firm arm support.

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

ECMV

[Komnet]

Electronic controlled travel control lever

Fuel control dial

Brake pedal

Monitor panel

(Built-in KOMTRAX)

Deceleration pedal

Transmission control valve

Auxiliary valve

Transmission output speed sensor

Engine controller

Steering and transmission controller

Air conditioner controller

Electronic controlled transmission

Electronic controlled steering/brake system

Engine

Torque converter

Brake pedal potentiometer

ECMV

Outline of electronic control system

Human-Machine Interface PCCS (Palm Command Control System)

Gearshift pattern preset function

When the gearshift pattern is set to either <F1-R2>, <F2R2> or <F2-R3L> in automatic gearshift mode, the gear is automatically shifted, reducing round trip repetition work time and operator's efforts.

F1-R1 MODE

Automatic gearshift mode

F1-R2 MODE

F2-R2 MODE

Press DOWN switch

Press UP switch

F2-R3L MODE

Press DOWN switch

Press UP switch

F1-R1 MODE

Manual gearshift mode

F1-R2 MODE

F2-R2 MODE

Press DOWN switch

Press UP switch

DOWN

ECMV (Electronic Controlled Modulation Valve) controlled transmission and brakes

Controller automatically adjusts each clutch engagement depending on travel conditions, providing smooth shockless clutch engagement, improved component life and operator ride comfort.

Palm command electronic controlled travel control joystick

Palm command travel joystick provides the operator with a relaxed posture and superb fine control. Tr ansmission gear shifting is simplified with thumb push buttons.

New integrated ROPS cab (Optional)

A newly designed cab is integrated with ROPS. High rigidity and superb sealing performance sharply reduce noise and vibration for the operator and helps prevent dust from entering the cab. The result is relaxed operation in a comfortable environment for the operator. In addition, side visibility is increased because external ROPS structure and posts are not required. Outstanding visibility has been achieved.

Comfortable ride with cab damper mounting

The D155A-6’s cab mount uses a cab damper which provides excellent shock and vibration absorption capacity with its long stroke. Cab damper mounts soften shocks and vibration while traveling over adverse conditions, which conventional mounting systems are unable to absorb. The cab damper spring isolates the cab from the machine body, suppressing vibration and providing a quiet, comfortable operating environment.

Air conditioner switches

Basic operation switches

Function switches

Indicators

Large multi-lingual LCD color monitor

A large user-friendly color monitor enables, accurate and smooth work. Improved screen visibility is achieved by use of TFT liquid crystal display that can easily be read at various angles and lighting conditions. Simple and easy to operate switches. Industry first function keys facilitate multifunction operations. Display data in 10 languages to globally support operators around the world.

UP SHIFT LH

DOWN SHIFT

Rubber Boot

SpringSilicon oil

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AINTENANCE

EATURES

D155A-6

CRAWLER DOZER

D155A-6

C RAWLER D OZER

Multi-monitor with troubleshooting function to keep operator informed

Var ious meters, gauges, and warning functions are centrally arranged on the multi-monitor. Offers ease of start-up inspection and promptly warns the operator with a lamp and buzzer if any abnormalities should occur. In addition, countermeasures are indicated in 4 stage codes. Replacement times for oil and filters are also indicated.

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.

Oil pressure checking ports

Pressure checking ports for power train components are centralized to promote quick and simple diagnosis.

Gull-wing engine side covers

The opening area is further enlarged when gull-wing engine side covers are opened, facilitating engine maintenance and filter replacement. Side covers have been changed to a thick one-piece structure with a bolt-on catch to improve durability.

Electric priming pump

Simply pressing the button enables bleeding air from the fuel circuit at the time of filter replacement, etc.

Preventative maintenance

Preventative maintenance is the only way to ensure long service life from your equipment.That’s why Komatsu designed the D155A-6 with conveniently located maintenance points to make necessary inspections and maintenance quick and easy.

Reliable simple hull frame

Simple hull structure main frame design increases durability and reduces stress concentration at critical areas. The monocoque track frame has a large cross section and utilizes pivot shaft mounting for greater reliability.

Sealed DT connectors

Main harnesses and controller connectors are equipped with sealed DT connectors providing high reliability, as well as water and dust resistance.

Flat face O-ring seals

Flat face O-ring seals are used to securely seal all hydraulic hose connections and to help prevent oil leakage.

Enclosed hydraulic piping

Hydraulic piping for the blade tilt cylinder is completely housed in the push arm, helping protect it from damage.

Modular power train design

Power train components are sealed in a modular design, making servicing work clean, smooth and easy.

Disc brakes

Wet disc brakes require less maintenance.

Low maintenance costs

Measures against poor quality fuel

In order to help protect the engine against dust and water contained in the fuel, the machine is equipped with an additional main fuel filter and a large water separator. In addition, fuel tank drain valve, water drain valve of the water separator and fuel drain valve are concentrated at one place.

Dust-proof measures

Large fresh air pre-cleaner is also provided as optional equipment. The hydraulic tank and the fuel tank are equipped with a high-filtration breather with pressure valve to help prevent dust from entering.

Large water separator

Additional main fuel filter

Large fresh air pre-cleaner

High-filtration breather

Engine

Hull frame

Final drive

Pivot shaft

Tr ac k frame

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WA380-6

PECIFICATIONS

D155A-6

CRAWLER DOZER

D155A-6

C RAWLER D OZER

STEERING SYSTEM

PCCS lever controls for all directional movements. Pushing the PCCS lever forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the PCCS lever to the left to make a left turn. Tilt it to the right for a right turn.

Wet, multiple-disc, pedal-controlled service brakes are springactuated and hydraulically released. Gearshift lock lever also applies parking brakes.

Minimum turning radius. . . . . . . . . . . . . . . . . . . . . . . . . . 2.14 m 7'0"

UNDERCARRIAGE

Suspension. . . . . . . . . . . . . . . . . . Oscillation-type with equalizer bar

and forward mounted pivot shafts

Tr ack roller frame. . . . . . . . . . . . . . . . . . . . Monocoque, high-tensile-

strength steel construction

Tr ack shoes

Lubricated tracks. Unique dust seals for helping prevent entry of foreign abrasives into pin-to-bushing clearance for extended service. Track tension easily adjusted with grease gun.

Number of shoes (each side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Grouser height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 mm 3.1"

Shoe width (standard/maximum) . . . . . . . . 560 mm 22"/710 mm 28"

Ground contact area . . . . . . . . . . . . . . . . . . . . . 35280 cm25,468 in

Ground pressure (tractor only) . . . . . . 90.2 kPa 0.92 kg/cm213.1 psi

Number of track rollers (each side) . . . . . . . . . . . . . . . . . . . . . . . . . 7

Number of carrier rollers (each side) . . . . . . . . . . . . . . . . . . . . . . . . 2

COOLANT AND LUBRICANT CAPACITY (REFILL)

Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625 ltr 165 U.S. gal

Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 ltr 21.7 U.S. gal

Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ltr 9.8 U.S. gal

Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 ltr 0.4 U.S. gal

Tr ansmission, bevel gear

and steering system . . . . . . . . . . . . . . . . . . . 90 ltr 23.8 U.S. gal

Final drive (each side). . . . . . . . . . . . . . . . . . . . 31 ltr 8.2 U.S. gal

OPERATING WEIGHT

Tr actor weight. . . . . . . . . . . . . . . . . . . . . . . . . . . 32300 kg 71,200 lb

Including rated capacity of lubricant, coolant, full fuel tank, operator and standard equipment

Operating weight . . . . . . . . . . . . . . . . . . . . . . . .

41700 kg 91,930 lb Including Strengthened Semi U, giant ripper, cab, operator, standard equipment, rated capacity of lubricant, coolant, and full fuel tank.

Ground pressure. . . . . . . . . . . . . .

115.8 kPa 1.18 kg/cm216.8 psi

FINAL DRIVES

Double-reduction, spur and planetary final drives increase tractive effort. Segmented sprockets are bolt-on for easy in-the-field replacement.

01234567 mph

Tra vel Speed

Drawbar Pull

24681012 km/h

US ton tonkN

400

500

600

300

200

100

F3L

D155A-6

Power Shift

DRAWBAR PULL VS SPEED.

MAXIMUM USABLE PULL

DEPENDS ON TRACTION AND

WEIGHT OF TRACTOR INCLUDING

MOUNTED EQUIPMENT.

Travel speed Forward Reverse

1st 3.9 km/h 2.4 mph 4.7 km/h 2.9 mph 2nd 5.7 km/h 3.5 mph 6.8 km/h 4.2 mph 3rd L 7.5 km/h 4.7 mph 9.2 km/h 5.7 mph 3rd 11.4 km/h 7.1 mph 13.7 km/h 8.5 mph

ENGINE

Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D140E-5

Type. . . . . . . . . . . . . . . . . . . . . 4-cycle, water-cooled, direct injection

Aspiration . . . . . . . . . . . . . . . . . . Turbocharged, air-to-air aftercooled

Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Bore x stroke . . . . . . . . . . . . . . . . . 140 mm x 165 mm 5.51" x 6.50"

Piston displacement. . . . . . . . . . . . . . . . . . . . . . . . . 15.24 ltr 930 in

Governor . . . . . . . . . . . . . . . . . . All-speed and mid-range, electronic

Horsepower

SAE J1995 . . . . . . . . . . . . . . . . . . . . . . . . . Gross 268kW 360HP

ISO 9249 / SAE J1349* . . . . . . . . . . . . . . . . . . Net 264kW 354HP

Rated rpm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1900rpm

Fan drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic

Lubrication system

Method . . . . . . . . . . . . . . . . . . . . . . . Gear pump, force lubrication

Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full-flow

*Net horsepower at the maximum speed of

radiator cooling fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

239kW 320HP

TORQFLOW TRANSMISSION

Komatsu’s automatic TORQFLOW transmission consists of a watercooled, 3-element, 1-stage, 1-phase torque converter, 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 machine from accidental starts.

DOZER EQUIPMENT

DIMENSIONS

HYDRAULIC SYSTEM

Overall length Blade Blade Maximum lift Maximum drop Maximum tilt Additional

with dozer capacity length x height above ground below ground adjustment weight

Semi-U 6010 mm 9.4 m

4130 mm x 1790 mm 1250 mm 590 mm 950 mm 4960 kg

Tilt Dozer 19'9" 12.3 yd

13'7" x 5'10" 4'1" 1'11" 3'1" 10,940 lb

Strengthened 6010 mm 9.4 m

4130 mm x 1790 mm 1250 mm 590 mm 950 mm 5620 kg

Semi-U Tilt Dozer 19'9" 12.3 yd

13'7" x 5'10" 4'1" 1'11" 3'1" 12,390 lb

Full-U 6430 mm 11.9 m34225 mm x 1790 mm 1250 mm 590 mm 970 mm 5630 kg

Tilt Dozer 21'1" 15.6 yd

13'10" x 5'10" 4'1" 1'11" 3'2" 12,410 lb

Angle 6580 mm 4.6 m

4850 mm x 1170 mm 1560 mm 660 mm 520 mm 5170 kg

Dozer 21'7" 6.0 yd

15'11" x 3'10" 5'1" 2'2" 1'8" 11,400 lb

Number of cylinders Bore

Blade Lift 2 110 mm 4.33" Blade Tilt 1 160 mm 6.30" Ripper Lift 1 180 mm 7.09" Ripper Tilt 1 200 mm 7.87"

Closed-center load sensing system (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control unit: All spool control valves externally mounted beside the hydraulic tank. Var iable piston pump with capacity (discharge flow) of 200 ltr/min 52.8 U.S. gal/min for implement at rated engine rpm.

Relief valve setting . . . for implement 27.5 MPa 280 kg/cm23,980 psi Control valves: Spool control valve for Semi-U tilt dozer and Full-U tilt dozer.

Positions: Blade lift . . . . . . . . . . . . . . . Raise, hold, lower, and float

Blade tilt . . . . . . . . . . . . . . . . . . . . . Right, hold, and left

Additional control valve required for variable digging angle multi-shank ripper and giant ripper.

Positions: Ripper lift . . . . . . . . . . . Raise, hold, and lower and float

Ripper tilt . . . . . . . . . . . . . Increase, hold, and decrease

Hydraulic cylinders . . . . . . . . . . . . . . . . . . . . . . Double-acting, piston

Hydraulic oil capacity (refill):

Semi-U tilt dozer . . . . . . . . . . . . . . . . . . . . . .

85 ltr 22.5 U.S. gal

U-tilt dozer . . . . . . . . . . . . . . . . . . . . . . . . . . 85 ltr 22.5 U.S. gal

Ripper equipment (additional volume):

Multi-shank ripper . . . . . . . . . . . . . . . . . . . . 37 ltr 9.8 U.S. gal

Giant ripper . . . . . . . . . . . . . . . . . . . . . . . . . 37 ltr 9.8 U.S. gal

Use of high-tensile-strength steel in moldboard for strengthened blade construction. Blade tilt hose piping is mounted inside the dozer push arm to help prevent damage.

G.L

Ground clearance: 500 mm 1' 8"

A 4130 mm 13'7" B 2140 mm 7' C 3510 mm 11'6" D 1790 mm 5'10" E 3150 mm 10'4" F 8680 mm 28'6" G 3100 mm 10'2" H 1370 mm 4'6" I 900 mm 2'11" J 3395 mm 11'2"