Komatsu PC450-8R User manual

www.Komatsu.com
CEN00274-00 Materials and specifications are subject to change without notice.
is a trademark of Komatsu Ltd. Japan.
Printed in Japan 200705 IP.As(10)
Photo may include optional equipment.
PC450-8R
PC450LC-8R
PC
450
HYDRAULIC EXCAVATOR
FLYWHEEL HORSEPOWER
Gross: 270 kW 362 HP @ 1900 rpm
Net: 257 kW 345 HP @ 1900 rpm
OPERATING WEIGHT
PC450-8R: 43320– 43740 kg
95,500– 96,430 lb
PC450LC-8R: 44320– 44770 kg
97,710– 98,700 lb

3
Photo may include optional equipment.
2
Easy Maintenance
•Long replacement interval of engine oil,
engine oil filter, hydraulic oil and
hydraulic filter.
•Side-by-side radiator and oil cooler
configuration enables independent removal
and installation of those two components.
•Equipped with the EMMS monitoring
system.
•Easy access to engine oil filter and fuel
drain valve
•Large fuel tank capacity
•Electric priming pump installed.
•Equipped with large size steps for easier
maintenance.
See page 9.
Ecology and Economy Features
•High power Komatsu SAA6D125E engine
A powerful turbocharged and air to air aftercooled Komatsu SAA6D125E-5
engine provides 257 kW 345 HP.
•Economy mode saves fuel consumption.
•Low operation noise
See pages 4 and 5.
●High Production and
Low Fuel Consumption
High power, working performance and
fuel efficiency improve production and
fuel costs.
●Excellent Machine Stability
Large counterweight offers superior
machine stability and balance.
●Large Digging Force
Pressing the Power Max function
button temporarily increases the
digging force 7%.
●Two-mode Setting for Boom
Switch selection allows either powerful
digging or smooth boom operation.
See page 5.
Productivity Features
WALK-AROUND
HYDRAULIC EXCAVATOR HYDRAULIC EXCAVATOR
PC450-8R
PC450-8R 0
Genuine Answers for Land
and Environment Optimization
Large Comfortable Cab
• Low-noise cab
• Low vibration with cab damper mounting
• Highly pressurized cab with optional air conditioner
• Operator seat and console with armrest that enables
operations in the appropriate operational posture.
See page 6.
HORSEPOWER
Gross: 270 kW 362 HP @ 1900 rpm
Net: 257 kW 345 HP @ 1900 rpm
OPERATING WEIGHT
PC450-8R: 43320 – 43740 kg
95,500 – 96,430 lb
PC450LC-8R: 44320 – 44770 kg
97,710 – 98,700 lb
BUCKET CAPACITY
1.90 – 2.10 m3
2.49 – 2.75 yd3
Variable Track Gauge (optional)
• Greatly increases lateral stability
• Compliant with transportation regulations
See page 5.
Quarry Bucket
Quarry Cab
Strengthened
Revolving Frame
with Deck Guard
Full Roller Guards and
Double-flange Track Rollers
Heavy-duty Arm
Heavy-duty Boom
Safety Design
• Cab dedicated to hydraulic excavator for protecting
the operator if the event of machine rolls over.
• Anti-slip plates for safe work on machine
• Rear view monitoring system for easy checking
behind the machine (optional)
See page 7.
Large TFT LCD Monitor
• Easy-to-see and use 7" large
multi-function color monitor
• Can be displayed in 12 languages
for global support.
TFT : Thin Film Transistor
LCD : Liquid Crystal Display
See page 8.
Excellent Reliability and Durability
• The fuel reliability is improved by adding fuel
main-filter and water separator working against
low grade fuel.
• Equipped with fuel pre-filter as standard (with
water separator).
• High pressure in-line filter
See page 10.

54
PRODUCTIVITY & ECOLOGY FEATURES
High Power Komatsu SAA6D125E Engine
The PC450-8R gets its exceptional power and work capacity
from a Komatsu SAA6D125E-5 engine. Output is 257 kW
345 HP, providing increased hydraulic power and improved
fuel efficiency.
The SAA6D125E-5 engine adopts the electronically
controlled Heavy Duty HPCR* fuel injection system.
*HPCR : High Pressure Common Rail
Low Operation Noise
Enables a low noise operation using the low-noise engine
and methods to cut noise at source. Ambient noise meets
the EU Stage 2 noise regulation.
Excellent Machine Stability
Large counterweight offers superior machine stability and
balance.
Electronic control
unit for engine
Hydraulic system
controller
Hydraulic control valve
Main pump
Seven-inch TFT
liquid crystal display
Engine
Heavy duty HPCR (High Pressure
Common Rail) system
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 genera-
tion of high performance and environment
friendly excavators.
Large Digging Force
With the one-touch Power Max. function digging force has
been further increased. (8.5 seconds of operation)
Maximum arm crowd force (ISO):
218 kN (22.2t) 233 kN (23.8t)
(with Power Max.)
Maximum bucket digging force (ISO):
259 kN (26.4t) 278 kN (28.3t)
(with Power Max.)
*Measured with Power Max function, 3380 mm 11'1" arm and ISO rating
7% UP
7% UP
HYDRAULIC EXCAVATOR PC450-8R 0
PC450-8R
Working Modes Selectable
Two established work modes are further improved.
P mode – Power or
work priority mode has
low fuel consumption,
but fast equipment
speed and maximum
production and power
are maintained.
E mode – Economy or
fuel priority mode
further reduces fuel
consumption, but
maintains the P-mode-like working equipment speed for light
duty work.
You can select Power or Economy modes using a one-touch
operation on the monitor panel depending on workloads.
E
P
Fuel priority
E mode
Work priority
P mode
Idling Caution
To prevent unnecessary
fuel consumption, an idling
caution is displayed on the
monitor, if the engine idles
for 5 minutes or more.
Eco-gauge that Assists Energy-saving Operations
Equipped with the Eco-gauge that can be recognized at a
glance on the right of the multi-function color monitor for
environment-friendly
energy-saving opera-
tions. Allows focus on
operation in the green
range with reduced CO2
emissions and efficient
fuel consumption.
Eco-gauge
Smooth Loading Operation
Two return hoses improve
hydraulic performance. In the arm
out function, a portion of the oil is
returned directly to the tank
providing smooth operation.
Boom floats upward, reducing
lifting of machine front. This
facilitates gathering blasted rock
and scraping down operations.
Boom pushing force is
increased, ditch digging and
box digging operation on hard
ground are improved.
Two-mode Setting for Boom
Smooth mode provides easy operation for gathering blasted
rock or scraping down operation. When maximum digging
force is needed, switch to Power mode for more effective
excavating.
Smooth mode Power mode
Return hoses
Variable Track Gauge (optional)
●Lateral stability is significantly improved when operating
with the gauge extended.
●Lateral stability is increased by 30% (compared with the
fixed gauge version).
●With trackframes retracted, overall width complies with
many local transportation regulations.
HYDRAULIC EXCAVATOR

Thermal and Fan Guards
Thermal and fan guards are
placed around high-
temperature parts of the
engine and fan drive.
76
WORKING ENVIRONMENT
HYDRAULIC EXCAVATOR PC450-8R 0
HYDRAULIC EXCAVATOR
PC450-8R
Large Serrated Steps Large Handrail
Lock Lever
Locks the hydraulic
pressure to prevent
unintentional move-
ment. Neutral start
function only allows
machine to be start-
ed in lock position.
Low Cab Noise
The newly-designed cab is highly rigid
and has excellent sound absorption
ability. Thorough improvement of noise
source reduction and use of low noise
engine, hydraulic equipment, and air
conditioner allows this machine to
generate a low level of noise.
Low Vibration with Cab Damper
Mounting
PC450-8R uses viscous damper
mounting for cab that incorporates
longer stroke and the addition of a
spring. The new cab damper mounting
combined with high rigidity deck aids
vibration reduction at operator seat.
Wide Newly-designed Cab
Newly-designed wide spacious cab
includes seat with reclining backrest.
The seat height and longitudinal incli-
nation are easily adjusted using a pull-
up lever. You can set the appropriate
operational posture of armrest together
with the console.
Reclining the seat further enables you
to place it into the fully flat state with
the headrest attached.
Pressurized Cab
Optional air conditioner, air filter and a
higher internal air pressure (+9.0 mm
Aq +0.35"Aq) prevent external dust
from entering the cab.
Automatic Air Conditioner
(optional)
Enables you
to easily and
precisely set
cab atmos-
phere with
the instru-
ments on the large LCD.
The bi-level control function keeps the
operator's head and feet cool and
warm respectively. This improved air
flow function keeps the inside of the
cab comfortable throughout the year.
Defroster function keeps front glass
clear.
Safety Features
Rubber
Silicon
Oil
Spring
Anti-slip Plates
Highly durable anti-slip
plates maintain superior
traction performance for
the long term.
Cab Dedicated to Hydraulic Excavator
The cab is designed specifically for hydraulic excavators and
gains reinforced strength from the pipe-structured cab frame-
work. The cab framework provides the high durability and
impact resistance with very high impact absorbency. The
seat belt keeps the operator in the safety of the cab during a
rollover.
Pump/Engine Room Partition
Pump/engine room
partition prevents oil
from spraying onto
the engine if a
hydraulic hose
should fail.

9
8
HYDRAULIC EXCAVATOR PC450-8R 0
Easy Maintenance
Large Capacity Air Cleaner
Large capacity air cleaner is
comparable to that of larger machines.
The larger air cleaner can extend air
cleaner life during long-term operation
and prevents early clogging and
resulting
power
decrease.
Reliability is
improved by a
new seal
design.
Long Work Equipment Greasing
Interval
High quality BMRC bushings and resin
shims are optionally available for work
equipment pins excluding bucket,
extending greasing interval to 500 hours.
Large Fuel Tank Capacity
Large fuel tank capacity extends
operating hours before refueling. Fuel
tank is treated for rust prevention and
improved corrosion resistance.
Long-life Oil, Filter
Uses high-performance
filtering materials and
long-life oil. Extends the
oil and filter replacement
interval.
Engine oil &
Engine oil filter every 500 hours
Hydraulic oil every 5000 hours
Hydraulic oil filter every 1000 hours
Hydraulic oil filter
(Eco-white element)
Easy Access to Engine Oil Filter
and Fuel Drain Valve
Engine oil dipstick and fill, and fuel
filter are mounted on same side to
improve accessibility. Fuel drain valve
are remotely mounted to improve
accessibility.
Fuel Drain Valve
Easy Radiator Cleaning
Since radiator and oil cooler
are arranged side-by-side, it
is easy to clean, remove
and install them.
Large LCD Color Monitor
Working Mode Application Advantage
Power mode ●Maximum production/power P●Fast cycle time
EEconomy mode ●Excellent fuel economy
LLifting mode ●Hydraulic pressure is
increased by 7%
BBreaker ●Optimum engine rpm,
operation hydraulic flow
ATT Attachment ●Optimum engine rpm,
mode hydraulic flow, 2 way
Mode Selection
The multi-function color monitor has Power mode, Economy
mode, Lifting mode, Breaker mode and Attachment mode.
Lifting Mode
When the Lifting mode is selected, lifting capacity is
increased 7% by raising hydraulic pressure.
6
7
8
1
2
3
4
5
1
2
3
4
5
6
Hydraulic oil temperature gauge
Fuel gauge
Eco-gauge
Function switches menu
Auto-decelerator
Working mode
Travel speed
Engine water
temperature gauge
Auto-decelerator
Working mode selector
Traveling selector
Buzzer cancel
Wiper
Windshield washer
Indicators
Basic operation switches
Basic
operation
switches
Air conditioner
operation
switches
Function
switches
8
1 2 3
4 5 6
7
5
6
1 2 3
4
Large Multi-lingual LCD Monitor
A large user-friendly color monitor
enables safe, accurate and smooth work.
Improved screen visibility is achieved by
the use of TFT liquid crystal display that
can easily be read at various angles and
lighting conditions. Simple and easy to
operate switches. Function keys facilitate
multi-function operations.
Displays data in 12 languages to globally
support operators around the world.
EMMS
(Equipment Management Monitoring System)
Monitor Function
Controller monitors engine oil
level, coolant temperature, bat-
tery charge and air clogging,
etc. If controller finds any
abnormality, it is displayed on
the LCD.
Maintenance Function
Monitor informs replacement
time of oil and filters on LCD
when the replacement interval
is reached.
Trouble Data Memory
Function
Monitor stores abnormalities for
effective troubleshooting.
HYDRAULIC EXCAVATOR
PC450-8R
MAINTENANCE FEATURES
Photo may include optional equipment.
Electric Priming Pump
Bleeding air from fuel system is easily
accomplished with the electric priming
pump.
Large-size Steps
On both right and left track frames
are fixed with wider steps for easier
maintenance.
Electric priming pump switch