5
4
Human-Machine Interface
Palm command
electronic controlled
travel control joystick
Ergonomically designed 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 new air
suspension seat and
travel control console
The air suspension operator
seat absorbs shocks and vibrations providing a smooth
comfortable ride. 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 increased operator comfort. The operator seat is also
tiltable for facilitating down hill dozing. The travel control
console has adjustments fore and aft, and for height. With an
independently adjustable armrest, each D475ASD operator
can adjust control positions to individual preference,
providing optimum operational posture for all operators.
Fuel control dial
Engine revolution is controlled by electric signals, providing
ease of operation eliminating maintenance of linkage and
joionts.
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, enables superb fine
control.
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.
Komatsu’s new ergonomically designed control system “PCCS” creates an operating
environment with
“complete operator control”.
Facing front
Air suspension seat
Left-hand joystick
Blade and ripper (option)
control joystick
MONITOR SYSTEM
Blade
control
lever
Ripper
control
lever (option)
Travel
control
lever
Brake pedal
potentio meter
Pitch
angle
sensor
Acceleration
sensor
Service
switch
Auto shift
down switch
Fuel
control
dial
Steering controller
Monitor panel
Deceleration
pedal
Transmission controller
Transmission control
Torque converter control
Implement control
Engine controller
Electronic controlled
transmission
Electronic controlled
steering/brake system
Engine
Torque converter
Transmission
control valve
Lockup
Engine
speed
Water
temp.
Fuel temp.
Engine oil
pressure
Fuel control
valve unit
ECMV
ECMV
ECMV
ECMV
ECMV
ECMV
ECMV
ECMV
Auxiliary
valve
Trans-
mission
output
speed
sensor
ECMV
Outline of electronic control system
Power Train Electronic Control System
Smooth and soft operation
D475ASD-5E0 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 acculately
calculate the control of the torque converter, transmission, steering clutches and brakes for optimized machine operation. The
ease of operation and productivity of the new D475ASD-5E0 is greatly improved through
these new features.
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,
improved component life and operator ride comfort.
ECMV (Electronic Controlled Modulation Valve) 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.)
F1-R1 MODE
F1-R2 MODE
F2-R2 MODE
Press
DOWN
switch
Press
DOWN
switch
Press
UP
switch
Press
UP
switch
UP
DOWN
Indicator
Heavy load
Light load
Actuated on heavy load
or steep slope
Electronic Controlled
Modulation Valve (ECMV)
Conventional modulation valve
Time
Clutch pressure
PCCS
(
PALM COMMAND CONTROL SYSTEM
)
D475ASD
-5E0
SUPER DOZER
D475ASD
-5E0
S
U P E R
D
O Z E R
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.
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.
Effect of ECMV steering clutches/brake control
