Ecology Features; Working Mode Selection - Komatsu PC1250 Brochure

PC1250
H
-8
Y D R A U L I C
P
RODUCTIVITY &
Komatsu Technology
Komatsu develops and produces all major
components, such as engines, electronics
and hydraulic components, in house.
With this "Komatsu Technology," and adding
customer feedback, Komatsu is achieving
great advancements in technology.
To achieve both high levels of productivity and
economical performance, Komatsu has
developed the main components with a total
control system.
The result is a new generation of high
performance and environment friendly
excavators.
Environment-friendly Clean Engine Mounted
The PC1250-8, which is equipped with the Komatsu
SAA6D170E-5 engine, meets the Tier 3 emission certified in
North America (EPA) and EU stage 3A.
The SAA6D170E-5 engine adopts the world's first cooled
EGR system with electronically controlled bypass-assist type
venturi. NOx emission is reduced 40%, while maintaining
high power and low fuel consumption.
This is an image photo: may
4
differ from the actual engine.
E
X C A V A T O R
E F
COLOGY EATURES
LCD color monitor
Hydraulic system
controller
Main pump
Pump for fan
Electronically controlled
variable speed fan
Electronic control
unit for engine
Engine
Heavy duty HPCR (High Pressure
Common Rail) system
Electronically controlled cooled
Hydraulic control valve
EGR system
Electronically Controlled Variable Speed Fan
Contributes to Low Fuel Consumption and Low
Noise
The electronic control system sets
the rotational speed of the cooling
fan according to the coolant,
hydraulic oil, and ambient
temperature; effectively uses the
engine output to prevent wasteful fuel
consumption; and reduces noise
during low-speed fan rotation.
Lower and Economical Fuel
Consumption Using
Economy Mode
Enables operator to set the Eco
mode to up to four levels
according to working conditions
so that production requirement is
achieved at lowest possible fuel consumption.
Reduction of Ambient Noise
Reduced noise by adoption of an electronically controlled
variable speed fan drive, large hybrid fan, low-noise muffler
and cover with glasswool. Komatsu will launch PC1250 with
lower-noise specifications to the EU market.
HYDRAULIC EXCAVATOR
Large Digging Force
Thanks to the high engine output and an excellent hydraulic
system, this machine demonstrates powerful digging force.
Maximum arm crowd force (ISO):
412 kN 42.0 ton
Maximum bucket digging force (ISO):
479 kN 48.8 ton
Large Drawbar Pull and Steering Force
Since the machine has a large drawbar pull and a high
steering force, it demonstrates excellent mobility even when
it is being used on inclined sites.
Two-mode Setting for Boom
Smooth mode provides easy operation for gathering blasted
rock and scraping operations. When maximum digging force is
needed, switch to power mode for more effective excavating.
Boom raise
Power
Smooth
mode
mode
Shockless Boom Control
The PC1250-8 boom circuit features a shockless valve
(double-check slow return valve) to automatically reduces
the amount of vibration present when operating the boom.
Operator fatigue is reduced (which can improve safety and
productivity), and spillage caused by vibration is minimized.
Extend and
retract
PC1250

Working Mode Selection

Power and Economy Mode
The PC1250-8 excavator is equipped with two working
modes. Each mode is designed to match engine speed,
pump flow, and system pressure to the current application,
giving the operator flexibility to match equipment performance
to the job at hand.
Working Mode Application Advantage
● Maximum production/power
Power
P
● Fast cycle time
Mode
● Good cycle time
E Economy
● Good fuel economy
Mode
(E0,E1,E2,E3)
Heavy Lift Mode
Gives the operator 10% more lifting force on the boom when
needed for handling rock or heavy lifting applications.
Swing Priority Setting
The swing priority setting allows the operator to use the same
easy motion for 180˚ loading as 90˚ loading operations. By
altering the oil flow, this setting allows you to
select either boom or swing
as the priority for
increased production.
Power Mode
Economy Mode
Heavy Lift Mode
Swing Priority Mode
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