Komatsu PC850-8, PC850SE-8 User Manual
www.Komatsu.com
CEN00073-04 Materials and specifications are subject to change without notice.
is a trademark of Komatsu Ltd. Japan.
Printed in Japan 200809 IP.As(05)
STANDARD EQUIPMENT
ENGINE AND RELATED ITEMS:
● Air cleaner, double element, dry
● Variable speed cooling fan, with fan guard
● Engine, Komatsu SAA6D140E-5
ELECTRICAL SYSTEM:
● Alternator, 50 amp, 24 V
● Batteries, 170 Ah, 2 x 12 V
● Starting motors, 11kW
● Working lights-2 boom, 2 cab top front, 1 cab bottom
● Step light with timer
● Auto decelerator
UNDERCARRIAGE:
● 610 mm 24'' double grouser
● 8 track/3 carrier rollers (each side)
● Hydraulic track adjusters (each side)
● Variable track gauge
● Sealed track
GUARDS AND COVERS:
● Dust-proof net for radiator and oil cooler
● Pump/engine room partition cover
● Travel motor guards
● Strengthened revolving frame underguard
● OPG top guard (operator protective guards ISO 10262 level 2 (FOG))
OPERATOR ENVIRONMENT:
● Damper mount, all-weather, sound-suppressed cab with tinted
safety glass windows, lockable door, intermittent window wiper
and washer, floormat, cigarette lighter and ashtray
● Multi-function color monitor, electronically-controlled throttle dials,
electric service meter, gauges (coolant temperature, hydraulic oil
temperature and fuel level), caution lights (electric charge, engine
oil pressure, and air cleaner clogging), indicator lights (engine
preheating and swing lock light) level check lights (coolant, engine
oil, and hydraulic oil level), self-diagnostic system with trouble
data memory
● Rear view mirror (R,H)
● Seat, fully adjustable with suspension
● Cab with fixed front window
HYDRAULIC CONTROLS:
● Fully hydraulic, with Electronic Open-Center Load-Sensing
(EOLSS) and engine speed sensing (pump and engine mutual
control system)
● Two axial piston motors for swing with single-stage relief valve
● One axial piston motor per track for travel with counter balance
valve
● Two variable capacity piston pumps
● Two control valves, 5+4 spools (boom, arm, bucket, swing, and
travel)
● Control levers, wrist control levers for arm, boom, bucket, and
swing with PPC system
● Control levers and pedals for steering and travel with PPC system
● Oil cooler
● In-line filter
● Heavy lift mode system
● Shockless boom control
● Swing priority selection system
● Two-mode setting for boom
DRIVE AND BRAKE SYSTEM:
● Brakes, hydraulic lock travel brakes, oil disc parking
● Hydrostatic two travel speed system with planetary triple reduction
final drive
OTHER STANDARD EQUIPMENT:
● Automatic swing holding brake
● Counterweight, 11850 kg 26,120 lb
● Horn, electric
● Marks and plates, English
● Paint, Komatsu standard
● Large handrails
● One-touch engine oil drainage
● PM tune-up service connector
● Remote greasing for radiator fan drive
● Travel alarm
● Rear reflector
● Anti-slip plates
● Corrosion resistor
OPTIONAL EQUIPMENT
● Alternator, 75 Amp, 24 V
● Air suspension seat
● Arms (Backhoe):
PC850-8:
—3600 mm 11'10'' HD arm assembly
PC850SE-8:
—2945 mm 9'8'' SE arm assembly
—3600 mm 11'10'' HD arm assembly
● Auto air conditioner
● Booms (Backhoe):
PC850-8:
—8040 mm 26'5'' boom assembly
PC850SE-8:
—7100 mm 23'4'' boom assembly
● Cab front guard (ISO 10262 level 2)
● Catwalk
● Coolant heater
● Double flange track roller
● 12V electric supply
● Fire extinguisher
● General tool kit
● Grease gun, electric pump with indicator
● Interconnected horn and warning light
● Large-capacity batteries
● Lower wiper
● Provision for fast fuel fill
● Radio AM/FM
● Rain visor
● Rear view mirror (L,H)
● Seat belt 78 mm 3''
● Shoes:
—710 mm 28'' double grouser
● Spare parts for first service
● Track frame undercover (center)
● Vandalism protection locks
HORSEPOWER
Gross: 370 kW 496 HP @ 1800 rpm
Net: 363 kW 487 HP @ 1800 rpm
OPERATING WEIGHT
PC850-8: 78700–79500 kg
173,500–175,270 lb
PC850SE-8: 78300–79100 kg
172,620–174,380 lb
Photo may include optional equipment.
PC850-8 BACKHOE
PC850SE-8 BACKHOE
PC
850
HYDRAULIC EXCAVATOR
2
WALK-AROUND
H YDRAULIC E XCAVATOR
HYDRAULIC EXCAVATOR
PC850-8
PC850-80
HORSEPOWER
Gross: 370 kW 496 HP @ 1800 rpm
Net: 363 kW 487 HP @ 1800 rpm
OPERATING WEIGHT
PC850-8: 78700– 79500 kg
173,500–175,270 lb
PC850SE-8: 78300– 79100 kg
172,620-174,380 lb
Ecology and Economy Features
● Komatsu SAA6D140E-5 Engine Meets Tier 3 Emissions Regulations.
• World’s first cooled EGR system with bypass-assist type electronically
controlled venturi
• Offers high power and low fuel consumption, while conforming to
Tier 3 emission regulations.
• Reduces NOx emission approximately 40%.
• Equipped with an electronically controlled variable speed fan.
●
Economy Mode Four-level Setting
Enables operator to select the appropriate Economy mode level to match
production requirement with lowest fuel consumption.
● Reduction of Ambient Noise
Meets the EU Stage 2 noise regulations.
• Electronically controlled variable speed fan drive
• Large hybrid fan
• Glasswool-furnished low-noise muffler and noise reducing cover around
the muffler
See page 4.
Working Environment
● Large Comfortable Cab
• Low noise and vibration with cab damper mounting
• Large-capacity air conditioner (optional)
• Pressurized cab prevents external dust from entering
• OPG top guard level 2 (by ISO 10262 standard)
capable with optional bolt-on top guard.
See pages 8, 9.
Advanced Monitor Features
• Machine condition can be checked with
Equipment Management Monitoring System
(EMMS). See page 11.
• Two working modes combine with heavy lift
mode for maximum productivity. See page 5.
Photo may include optional equipment.
Easy Maintenance
● Easy Cleaning of Cooling Unit
Fan reverse-rotation function
facilitates clogged radiator cleaning.
● Centralized Arrangement of Engine
Checkpoints
● Anti-slip Plates for improved foot
traction
● Large Handrail, Step and Catwalk
provide easy access to the engine
and hydraulic equipment.
● Increased Fuel Tank Capacity
See page 10.
● Highly Reliable Electronic Devices
Exclusively designed electronic devices have
passed severe testing.
• Controllers • Sensors • Connectors
• Heat resistant wiring • Circuit breaker
● Boom Foot Hoses are arranged under the boom
foot, improving hose life and safety.
See page 6.
Excellent Reliability and Durability
● KMAX Bucket Teeth offer superior penetration and longterm sharpness.
● Fuel Pre-filter with water separator equipped as standard.
● O-ring Face Seals, which have excellent sealing
performance, are used for the hydraulic hoses.
● High-pressure In-line Filtration
The cool-running hydraulic system is protected with the
most extensive filtration system available, including a
high pressure in-line filter for each main pump.
Productivity Features
● High Work Equipment Speed
Increased arm dumping and bucket
dumping speed realize efficient loading
operation.
● Heavy Lift Mode
The heavy lift mode increases lifting force by
10%.
● Large Digging Force
High operation efficiency with large digging
force for severe applications.
● Two-mode Setting for Boom
Switch selection allows either powerful
digging or smooth boom operation.
● Twin Swing Motor System provides excellent
swing performance, even on slopes.
● Large Drawbar Pull and Steering Force
provide excellent mobility.
● Swing Priority Mode
The swing priority mode improves efficiency
for loading dump trucks.
● Shockless Boom
Switch selection reduces chassis vibration
after sudden stops.
See page 5.
3
54
PRODUCTIVITY & ECOLOGY FEATURES
HYDRAULIC EXCAVATOR
PC850-80
Working Mode Application Advantage
Power
● Maximum production/power
P
Mode ● Fast cycle time
E Economy
● Good cycle time
Mode ● Good fuel economy
Working Mode Selection
Power and Economy Mode
The PC850-8 excavator is equipped with two working
modes. Each mode is designed to match engine flow, pump
speed, and system pressure to the current application, giving
the operator flexibility to match equipment performance to
the job at hand.
Environment-friendly Clean Engine Mounted
The PC850-8, which is equipped with the Komatsu
SAA6D140E-5 engine, meets the Tier 3 emission
regulations in North America (EPA) and EU Stage 3A.
The SAA6D140E-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.
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 (optional)
Reduced noise by adoption of an electronically controlled
variable speed fan drive, large hybrid fan, low-noise muffler
and cover with glasswool, to meet EU Stage 2 noise
regulations.
(E0,E1,E2,E3)
Pump for fan
Electronic control
unit for engine
Electronically controlled
variable speed fan
Hydraulic system
controller
LCD color monitor
Engine
Heavy duty HPCR
(High Pressure
Common Rail)
system
Electronically controlled cooled
EGR system
Hydraulic control valve
Main pump
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.
This is an image photo: may
differ from the actual engine.
Selection
ON
OFF
Result
Oil flow to the swing motor is increased.
180˚loading operations are most efficient.
Oil flow to the boom is increased.
90˚loading operations are most efficient.
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
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):
298 kN 30.4 ton
Maximum bucket digging force (ISO):
363 kN 37.0 ton
Work Equipment Speed Increased
An arm quick return circuit is provided for arm dumping. This
returns a portion of oil flow directly to the hydraulic tank at
arm dumping to reduce the hydraulic pressure loss.
Combined with increased bucket dumping speed, faster
loading work is realized.
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.
Shockless Boom Control
The PC850-8 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
H YDRAULIC E XC AVATO R
PC850-8
Smooth
mode
Boom raise
Power
mode
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