Komatsu D155A-6 Brochure page 3

D155A
C D
-6 R A W L E R
P
RODUCTIVITY
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.
Automatic gearshift
mode screen
Large blade capacity
Capacity of 9.4 m 3 12.3 yd 3 (Semi-U dozer) and 11.9 m
21.7 yd 3 (U dozer) yield outstanding production. High-
tensile-strength steel is incorporated into the front and sides
of the blade for increased durability.
4
O Z E R
F
EATURES
Manual gearshift
mode screen
Ripper performance
3 Ripper cylinders are reduced from four to two, greatly
improving rear visibility during ripping.
Also, expanded ripper movement offers a wider range of
operation.
D155A-2
Engine
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.
Undercarriage
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'')
Ripper point
penetration
area
G.L
D155A-6
D155A
CRAWLER DOZER WA380
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.
Radiator
Fan drive
hydraulic
motor
Power train oil
temperature
sensor
Coolant
temperature
sensor
Hydraulic
pump
Controller
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