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11

D155A-5

CRAWLER DOZER

10

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

6300 mm

8.8 m

3

3955 mm x 1720 mm

1250 mm

590 mm

1000 mm

4900 kg

Tilt Dozer

20'8"

11.5 yd

3

13' x 5'8"

4'1"

1'11"

3'3"

10,800 lb

Full-U

6695 mm

11.8 m

3

4265 mm x 1760 mm

1250 mm

590 mm

1080 mm

5600 kg

Tilt Dozer

22'

15.4 yd

3

14' x 5'9"

4'1"

1'11"

3'7"

12,350 lb

Angle

6502 mm

4.9 m

3

4850 mm x 1205 mm

1295 mm

745 mm

520 mm

5140 kg

Tilt Dozer

21'4"

6.4 yd

3

15'11" x 3'11"

4'3"

2'5"

1'8"

11,330 lb

Number of cylinders

Bore

Blade Lift

2

120 mm 

4.72"

Blade Tilt

1

180 mm 

7.09"

Ripper Lift

2

160 mm 

6.30"

Ripper Tilt

2

160 mm 

6.30"

DOZER EQUIPMENT

HYDRAULIC SYSTEM

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.
Gear-type hydraulic pump with capacity (discharge flow) of 

255 ltr 

67.4 U.S. gal/min at rated engine rpm.

Relief valve setting. . . . . . . . . . . . . . 20.6 MPa 

210 kg/cm

2

2,990 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
Ripper tilt . . . . . . . . . . . . . . . . . . . . . Increase, hold, and decrease

Hydraulic cylinders

. . . . . . . . . . . . . . . . . . . . Double-acting, piston

Hydraulic oil capacity (refilling):

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

97 ltr

25.6 U.S. gal

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

97 ltr

25.6 U.S. gal

Multi-shank ripper (additional volume) . . . . . . . . 

35 ltr

9.2 U.S. gal

Giant ripper (additional volume) . . . . . . . . . . . . 

35 ltr

9.2 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 protect from damage.

DIMENSIONS (SEMI-U TILT DOZER)

STANDARD EQUIPMENT

A

3955 mm

13'0"

B

2080 mm

6'10"

C

2260 mm

7'5"

D

2695 mm

8'10"

E

3500 mm

11'6"

F

925 mm

3'0"

G

870 mm

2'10"

H

2510 mm

8'3"

I

3210 mm

10'6"

J

8155 mm

26'9"

K

4975 mm

16'4"

OPTIONAL EQUIPMENT

ROPS CANOPY

Additional weight 

505 kg 

1,110 lb

Meets ISO 3471, SAE J1040 APR88, and ISO 3449 
FOPS standards.

Roof dimensions:
—Length:

1275 mm 

4'2"

—Width:

1500 mm 

4'11"

—Height from operator compartment floor:

1757 mm 

5'9"

STEEL CAB

Additional weight:

285 kg 

630 lb

All-weather, enclosed pressurized cab.

Roof dimensions:
—Length:

1765 mm 

5'9"

—Width:

1720 mm 

5'8"

—Height from floor to ceiling:

1515 mm 

5'

VARIABLE MULTI-SHANK RIPPER

Additional weight (including hydraulic control unit):

3710 kg 

8,180 lb

Beam length:

2260 mm 

7'5"

Hydraulically-controlled parallelogram-type ripper with 
three shanks. Digging angle steplessly adjustable 

Maximum digging depth:

870 mm 

2'10"

Maximum lift above ground:

925 mm 

3'

Standard digging angle*: 49°

VARIABLE GIANT RIPPER

Additional weight (including hydraulic control unit):

2760 kg 

6,080 lb 

Beam length:

1535 mm 

5' 

Hydraulically-controlled parallelogram-type ripper with one shank.
Digging angle steplessly adjustable 

Maximum digging depth:

1220 mm 

4' 

Maximum lift above ground:

925 mm 

3' 

Standard digging angle*: 49°

* Measured with ripper point on ground and shank is vertical

SHOES

OTHER

Air conditioner

Backup alarm

Cab heater and defroster

Engine side cover

Locks, filler caps and covers

Hinged, strengthened radiator mask

Reversible fan

Rigid drawbar

Seat belt

Tool kit and ordinary spare parts

Shoes (optional)

Additional weight

Ground contact area

560 mm 

22" single 

grouser shoes

0 kg

0 lb

35950 cm

2

5,572 in

2

610 mm 

24" single 

grouser shoes

+210 kg

+460 lb

39160 cm

2

6,070 in

2

660 mm 

26" single 

grouser shoes

+400 kg

+880 lb

42370 cm

2

6,567 in

2

710 mm 

28" single 

grouser shoes

+620 kg

+1,370 lb

45580 cm

2

7,056 in

2

560 mm 

22" extreme 

service shoes

+460 kg

+1,010 lb

35950 cm

2

5,572 in

2

610 mm 

24" extreme 

service shoes

+700 kg

+1,540 lb

39160 cm

2

6,070 in

2

660 mm 

26" extreme 

service shoes

+940 kg

+2,070 lb

42370 cm

2

6,567 in

2

Air cleaner, double element with 
dust indicator

Alternator, 

35 ampere

Batteries, 2 x 12V/

170 Ah

Blower cooling fan

Bogie roller guards

Decelerator pedal

Electronic instrument monitor panel

Fenders

Horn, warning

Hydraulics for dozer

Lighting system, (includes 2 front, 1 rear)

Mono-lever steering control

Muffler with rain cap

Radiator reserve tank

Rear cover

ROPS mounting brackets

Suspension seat

Starting motor, 

11 kW

/24V

Track roller guard, end sections 

Track shoe assembly
—Sealed and lubricated track

560 mm

22" single grouser shoe 

Underguards, oil pan and transmission

*Blade capacity is based on the SAE recommended practice J1265

Ground Clearance: 

485 mm

1'7"

Summary of Contents for D155A-5

Page 1: ...EIGHT 38700 kg 85 320 lb Photo may include optional equipment C RAWLER D OZER D155A 5 D 155A www Komatsu com Printed in Japan 200803 IP AD 05 CEN00003 02 Materials and specifications are subject to change without notice is a trademark of Komatsu Ltd Japan ...

Page 2: ...durability Forward mounted pivot shafts isolate final drives from blade loads See page 8 D155A 5 Crawler Dozer Blade tilt lines completely protected Komatsu Torqflow transmission offers single lever control of speed 3 forward and 3 reverse and directional changes See page 4 Easy to learn and easy to operate left hand joystick controls all tractor motion while right hand joystick controls all blade...

Page 3: ... cab soften shock for operator comfort and extend components life Operator s Compartment 4 D155A 5 CRAWLER DOZER Electronic Monitor Panel An electronic monitoring system prevents minor problems from developing into major ones All meters and gauges are controlled by a microcomputer which provides a wide indication range for easier more precise reading Electrical Charge Lamp Engine Air Intake Pre he...

Page 4: ...ndependent X bogies and rubber pads cushions are incorporated into the track rollers Powerful Drawbar Pull for All Kinds of Terrain The X bogie and rubber pad provide different suspension characteristics depending on the ground surface On flat ground REU functions as a conventional rigid undercarriage On uneven terrain the REU maximizes the suspension effect the shoes always follow the contour of ...

Page 5: ...d high reliability and low fuel consumption Automatic Preheating Mechanism The best preheating times is set automatically by sensing ambient temp erature This simplifies the preheating operation Modular Power Train Components Modular design has facilitated removal installation of power train components shortening machine downtime Wet Multiple Disc Brakes Eliminate brake adjustments for maintenance...

Page 6: ...449 FOPS standards Roof dimensions Length 1275 mm 4 2 Width 1500 mm 4 11 Height from operator compartment floor 1757 mm 5 9 STEEL CAB Additional weight 285 kg 630 lb All weather enclosed pressurized cab Roof dimensions Length 1765 mm 5 9 Width 1720 mm 5 8 Height from floor to ceiling 1515 mm 5 VARIABLE MULTI SHANK RIPPER Additional weight including hydraulic control unit 3710 kg 8 180 lb Beam leng...

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