Human-Machine Interface
Palm command
electronic controlled
travel control joystick
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 suspension seat and travel control
console
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
best operator comfort. The travel control console also has
adjustments fore and aft and for height. With an
independently adjustable armrest, each D375A operator
can adjust control positions to his individual preference,
providing optimum operational posture for
all operators.
Fuel control dial
Engine speed is controlled by electric signals, providing ease
of operation eliminating maintenance of linkage and joints.
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, provides
superb fine control. (Dual tilt and pitch operation are
activated by depressing switch with a thumb. This is available
with optional dual tilt dozer.)
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.
Position adjustable ripper control lever
Ripper control lever is position adjustable, providing optimum
operation posture for all operators during ripping operations
facing front or watching ripper point.
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Komatsu’s new ergonomically designed control system “PCCS” creates an operating
environment with
“complete operator control”.
Power Train Electronic Control System
Smooth operation
D375A-6 uses a newly designed power train electronic control system.The controller registers the amount of operator control
(movements of lever and operation of switches) and machine condition signals from each sensor, and calculates to accurately
control torque converter, transmission, steering clutches and brakes for optimized machine operation. The ease of operation
and productivity of the new D375A-6 is greatly improved by numerous new functions.
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,
expansion of component life and operator riding comfort.
ECMV (Electronic Controlled Modulation Valve) controlled steering clutches/brakes
Sensors monitor machine operating conditions, and the controller activates ECMV electronically to 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.
Preset travel speed selection function
When the gearshift pattern is set to either <F1-
R2>, <F2-R2> or <F2-R3L> in automatic
gearshift mode, the gear is automatically
shifted, reducing round trip repetition work time
and operator's efforts.
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.
Auto downshift function
Controller monitors engine speed, travel gear and travel
speed. When load is applied and machine travel speed is
reduced, the transmission automatically downshifts to
optimum gear speed to provide high fuel efficiency. This
function provides comfortable operation without manual
downshift and high productivity.
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