Komatsu Excavator PC300LC-8 PC300HD-8 service & repair manual

Description Komatsu Excavator PC300LC-8 PC300HD-8 service & repair manual

Komatsu Excavator PC300LC-8, PC300HD-8 pdf workshop service repair manual + operation & maintenance manual

Serial numbers:
PC300LC-8 A90001 and up
PC300HD-8 A87001 and up

MANUAL CONTENT:
GENERAL
SPECIFICATION DIMENSION DRAWINGS
Dimensions
Working Ranges
SPECIFICATIONS
WEIGHT TABLE
FUEL, COOLANT, AND LUBRICANTS

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
Engine Related Parts
Radiator, Oil Cooler and Aftercooler

POWER TRAIN
Power Train
Final Drive
Sprocket
Swing Machinery
Swing Circle

UNDERCARRIAGE AND FRAME
Track Frame and Recoil Spring
Idler
Carrier Roller
Track Roller
Track Shoe
Triple Grouser Shoe

HYDRAULIC SYSTEM
Hydraulic Equipment Layout Drawing
Hydraulic Tank and Filter
Hydraulic Pump
LS Valve
PC Valve
LS(PC)-EPC Valve
Variable Volume Valve
Control Valve
CLSS (Closed Center Load Sensing System)
Valve Functions and Operation
Hydraulic Circuit Diagram and the Name of Valves
Unloader Valve
LS Pressure
Pressure Compensation Valve
Pressure Compensation Valve Inner Shuttle
Boom Regeneration Circuit
Arm Regeneration Circuit
Merge-divider Valve
LS Select Valve
Self Pressure Reducing Valve
Travel Junction Valve
Travel PPC Shuttle Valve
Boom Drift Prevention Valve
Arm Drift Prevention Valve
Quick Return Valve
Lift Check Valve
Main Relief Valve
2-Stage Safety-suction Valve
Variable Pressure Compensation Valve
Attachment Circuit Selector Valve
Drift Prevention Valve
Valve Control
PPC Valve
Travel PPC Valve
Pressure Reducing Valve
Service PPC Valve (with EPC Valve)
Service PPC Valve
Solenoid Valve
PPC Accumulator
Return Oil Filter
Center Swivel Joint
Travel Motor
Parking Brake
Safety Valve
Swing Motor
Reverse Prevention Valve
Hydraulic Cylinder
Boom Cylinder
Arm Cylinder
Bucket Cylinder

WORK EQUIPMENT
Dimension Of Arm
Dimension Of Bucket
AIR CONDITIONER PIPING
ELECTRICAL SYSTEM
Engine Control
Fuel Control Dial
Engine Controller
Sensors
Coolant Temperature Sensor
Oil Pressure Switch
Engine Speed Sensor
Boost Pressure And Temperature Sensor
WIF (Water-in-fuel Detection) Sensor
Engine Oil Level Sensor

ELECTRONIC CONTROL SYSTEM
Control Function
System Diagram
Engine and Pump Control
Pump and Valve Control
LS Control Function
Cut-off Function
2-Stage Relief Function
Power Maximizing and Machine Push-up
Auto-deceleration
Auto-warm-up and Overheat Prevention
Swing Control
Travel Control
Attachment Flow Control and Circuit Selector
System Component Parts
PPC Oil Pressure Switch
Oil Pressure Sensor
Pump Pressure Sensor (High Pressure)
Pump Controller

MONITOR SYSTEM
Machine Monitor
Monitor Control, Display Portion
Monitor Items And Display
Switches
Sensors
KOMTRAX Terminal System
KOMTRAX Communication Modem - TH300

STANDARD VALUE TABLES
Engine Related
Chassis Related

TESTING AND ADJUSTING
CHASSIS SERVICE TOOLS
Sketches of special tools
ENGINE
Engine Speed
Air Boost Pressure
Exhaust Gas Color
Valve Clearance
Compression Pressure
Blow-by Pressure
Engine Oil Pressure
Fuel Pressure
Handling During Cylinder Cut-out Operation
Handling During No Injection Cranking Operation
Fuel Return Rate And Leakage
Bleeding Air From Fuel Circuit
Fuel Circuit For Leakage
AIR COMPRESSOR BELT TENSION
FAN BELT
ALTERNATOR BELT
SWING CIRCLE BEARINGS
TRACK SHOE TENSION
OIL PRESSURE IN WORK EQUIPMENT
OIL PRESSURE IN SWING
OIL PRESSURE IN TRAVEL CIRCUIT
CONTROL CIRCUIT OIL PRESSURE
PUMP PC OIL PRESSURE
PUMP LS OIL PRESSURE
SOLENOID VALVE OUTPUT PRESSURE
PPC VALVE OUTPUT PRESSURE
WORK EQUIPMENT VALVE ADJUSTMENT
SWING PPC VALVE ADJUSTMENT
HYDRAULIC DRIFT IN WORK EQUIPMENT
Boom and Bucket Cylinders
Arm Cylinder
Boom Lock Valve
PPC Valve
RELEASING HYDRAULIC PRESSURE
Oil Leakage Amount
BLEEDING AIR FROM VARIOUS SYSTEMS
DIODE INSPECTION PROCEDURES
MACHINE MONITOR - SPECIAL FUNCTIONS
Ordinary Functions and Special Functions of Machine Monitor
Operator Mode (Outline)
Display of Komatsu Logo
Display of Inputting Password
Display of Check of Breaker Mode
Display of Check Before Starting

TROUBLESHOOTING
FAILURE CODES TABLE
FUSE LOCATIONS
Connection Table of Fuse Box
Locations of Fusible Links
Location of Fuse Box and Fuse Numbers
GENERAL INFORMATION
Points to Remember when Troubleshooting
Sequence of Events in Troubleshooting
Handling Electric Equipment and Hydraulic Components
Connectors for Tier 3 Engines
Checks Before Troubleshooting
Classification and Troubleshooting Steps
Classification of Troubleshooting
Information in Troubleshooting Table
Possible Problems and Troubleshooting No
Connection Table for Connector Pin Numbers
T-adapter Box and T-adapter Table
FAILURE CODE (DISPLAY OF CODE)
989L00 - Engine Controller Lock Caution
AA10NX - Air Cleaner Clogging
AB00KE - Charge Voltage Low

DISASSEMBLY AND ASSEMBLY
SPECIAL TOOLS LIST
SKETCHES OF SPECIAL TOOLS
CONNECTOR REPAIR PROCEDURES
Contact Terminal Removal (HD30 Type)
Striping Insulation
Crimping Contact Terminal (HD30 Type)
Insertion Of Contact Terminal (HD30 Type)
Contact Terminal Removal (DT Type)
ENGINE COMPONENTS
Fuel Supply Pump
Engine Front Seal
Engine Rear Seal
Cylinder Head
RADIATOR
HYDRAULIC OIL COOLER
AFTERCOOLER
ENGINE AND HYDRAULIC PUMP
FINAL DRIVE
SWING MOTOR AND SWING MACHINERY
SWING CIRCLE

AIR CONDITIONER
STRUCTURE AND FUNCTION
Air Conditioner Component
Configuration and Function of Refrigerating cycle
Outline of Refrigerating Cycle
Air Conditioner Unit
Functions of Major Components in the Air Conditioner Unit
Control Plate
Compressor
Condenser and Receiver Drier

TESTING AND ADJUSTING
Caution About Refrigerant
Troubleshooting Procedure
Block Diagram
Circuit Diagram and Arrangement of Connector Pins
Detail of Air Conditioner Unit
Part and Connector Locations
Testing Air Leakage (Ducts)
Testing with Self-diagnosis Function
Testing Temperature Control
Testing Vent (Mode) Changeover
Testing Recirc/Fresh Changeover
Testing Inner Sensor
Testing Evaporator Temperature Sensor
Testing Sunlight Sensor
Testing (Dual) Pressure Switch for Refrigerant
Testing Relays

TROUBLESHOOTING
Troubleshooting Chart
Troubleshooting for Electrical System (E mode)
E-1 Power Supply System (Air Conditioner does not Operate)
E-2 Compressor System (Air is Not Cooled)
E-3 Blower Motor System (No Air Comes Out or Air Flow is Abnormal)
E-4 Temperature Cannot be Controlled
E-5 Vent (Mode) Cannot be Changed Over
E-6 Recirc/Fresh Air Cannot be Changed Over
Troubleshooting With Gauge Pressure
Connection of Service Tool
Precautions for connecting air conditioner piping
Handling of Compressor Oil

DIAGRAMS AND DRAWINGS
HYDRAULIC DIAGRAM
ELECTRICAL CIRCUIT DIAGRAM
ELECTRICAL CONNECTOR ARRANGEMENT DIAGRAM

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