Komatsu PC450-8, PC450LC-8, PC450HRD-8 Hydraulic Excavator Operation and Maintenance Manual (UEAM007204)
These PC450-8 series excavators live in hard conditions—demolition, quarry faces, heavy bulk digging—so staying ahead on maintenance is what keeps them earning. This Operation and Maintenance Manual is what I keep on hand to set a consistent service rhythm, know what to look at every day, and decide when to pull a machine out of rotation before something expensive fails. If, for example, the boom feels sluggish or the machine starts running hotter than usual, I use this book to trace through basic checks, verify the right inspection points, and rule out simple causes before calling in deeper diagnostics.
Applications & Use Cases
- Plan daily/weekly checks so operators know exactly what to inspect before and after shifts.
- Set realistic service intervals for filters, lubrication, and wear items to reduce surprise downtime.
- Trace early signs of hydraulic or swing issues and decide if it’s safe to keep running until the next window.
- Align operating habits (idling, warm-up, shutdown) with Komatsu’s guidance to extend component life.
- Verify correct adjustment and inspection points after repairs or when putting a machine back into heavy-duty work.
FAQ
Q: Can I keep this manual on a tablet in the cab?
A: Yes, it works well digitally; just make sure pages are easy to zoom so you can read inspection steps and diagrams on-site.
Q: Is it worth printing parts of it?
A: I usually print the daily checks and key maintenance pages, laminate them, and keep them in the toolbox for quick reference.
Safety Note
Always follow the manual’s safety and lockout instructions before inspecting, adjusting, or working under any part of the machine.
📘 Show Index
Komatsu PC450-8, PC450LC-8, PC450HRD-8 Hydraulic Excavator Index:
- FOREWORD
- FOREWORD
- SAFETY INFORMATION
- Noise emission levels
- Vibration levels
- INTRODUCTION
- DIRECTIONS OF MACHINE
- VISIBILITY FROM OPERATOR’S SEAT
- BREAKING-IN THE NEW MACHINE
- PRODUCT INFORMATION
- PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
- EPA REGULATIONS, ENGINE NUMBER PLATE
- SERVICE METER LOCATION
- YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR
- MACHINE SERIAL PLATE
- FOREWORD
- SAFETY
- OPERATION
- MAINTENANCE
- SPECIFICATIONS
- ATTACHMENTS AND OPTIONS
- HIGH REACH DEMOLITION MANUAL
- INDEX
- COLOPHON
- SAFETY
- SAFETY INFORMATION
- SAFETY LABELS
- LOCATION OF SAFETY LABELS
- SAFETY LABELS
- SAFETY INFORMATION
- SAFETY MACHINE OPERATION
- STARTING ENGINE
- OPERATION
- TRANSPORTATION
- Turn off the battery disconnect switch to the OFF position
- BATTERY
- TOWING
- LIFTING OBJECTS WITH BUCKET LINK LIFTING DEVICE (OPTIONAL EQUIPMENT)
- LIFTING OBJECTS WITH BUCKET
- SAFETY MAINTENANCE INFORMATION
- OPERATION
- MACHINE VIEW ILLUSTRATIONS
- OVERALL MACHINE VIEW
- CONTROLS AND GAUGES
- Machine Monitor
- DETAILED CONTROLS AND GAUGES
- MONITORING SYSTEM
- SWITCHES
- CONTROL LEVERS AND PEDALS
- SUN ROOF
- WINDSHIELD
- EMERGENCY ESCAPE HAMMER
- DOOR LOCK
- CAP WITH LOCK
- DRINK BOX
- MAGAZINE BOX
- ASHTRAY
- AIR CONDITIONER CONTROLS
- RADIO
- AUXILIARY ELECTRIC POWER
- FUSE
- FUSIBLE LINK
- CONTROLLER
- TOOL BOX
- GREASE PUMP HOLDER
- FIRE EXTINGUISHER
- REFUELLING PUMP
- ACCUMULATOR
- MACHINE OPERATIONS AND CONTROLS
- BEFORE STARTING ENGINE
- STARTING ENGINE
- AMBIENT TEMPERATURE RANGE FOR OPERATION
- AFTER STARTING ENGINE
- STOPPING THE ENGINE
- MACHINE OPERATION
- STEERING THE MACHINE
- SWINGING
- WORK EQUIPMENT CONTROLS AND OPERATIONS
- WORKING MODE
- PROHIBITED OPERATIONS
- GENERAL OPERATION INFORMATION
- TRAVELING ON SLOPES
- ESCAPE FROM MUD
- RECOMMENDED APPLICATIONS
- BUCKET REPLACEMENT AND INVERSION
- PARKING MACHINE
- MACHINE INSPECTION AFTER DAILY WORK
- LOCKING
- TRANSPORTATION
- TRANSPORTATION PROCEDURE
- LOADING AND UNLOADING WITH TRAILER
- LIFTING MACHINE
- TRANSPORTATION POSTURE
- PROCEDURE FOR INCREASING OR REDUCING TRACK FRAME GAUGE
- COLD WEATHER OPERATION
- COLD WEATHER OPERATION INFORMATION
- AFTER DAILY WORK COMPLETION
- AFTER COLD WEATHER SEASON
- LONG TERM STORAGE
- BEFORE STORAGE
- DURING STORAGE
- AFTER STORAGE
- STARTING MACHINE AFTER LONG-TERM STORAGE
- TROUBLES AND ACTIONS
- RUNNING OUT OF FUEL
- PHENOMENA THAT ARE NOT FAILURES
- TOWING THE MACHINE
- LIGHTWEIGHT TOWING HOLE
- SEVERE JOB CONDITION
- DISCHARGED BATTERY
- OTHER TROUBLE
- MAINTENANCE
- MAINTENANCE INFORMATION
- OUTLINE OF SERVICE
- HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
- EXPLANATION OF LUBRICATION CHART DECAL
- ELECTRIC SYSTEM MAINTENANCE
- WEAR PARTS
- RECOMMENDED FUEL, COOLANT, AND LUBRICANT
- RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN KOMATSU GENUINE OIL
- TIGHTENING TORQUE SPECIFICATIONS
- SAFETY CRITICAL PARTS
- SAFETY CRITICAL PARTS LIST
- MAINTENANCE SCHEDULE
- MAINTENANCE SCHEDULE CHART
- MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER
- MAINTENANCE PROCEDURE
- INITIAL 1000 HOURS MAINTENANCE (ONLY AFTER THE FIRST 1000 HOURS)
- WHEN REQUIRED
- CHECK BEFORE STARTING
- EVERY 50 HOURS MAINTENANCE (MANUAL GREASE SYSTEMS)
- EVERY 250 HOURS MAINTENANCE
- EVERY 500 HOURS MAINTENANCE (MANUAL GREASE SYSTEMS)
- EVERY 1000 HOURS MAINTENANCE
- EVERY 2000 HOURS MAINTENANCE
- EVERY 4000 HOURS MAINTENANCE
- EVERY 5000 HOURS MAINTENANCE
- EVERY 8000 HOURS MAINTENANCE
- AUTOMATIC GREASE SYSTEM
- Filling the grease reservoir
- Method of filling grease reservoir
- Indication on the in-cab display
- SPECIFICATIONS
- ATTACHMENTS AND OPTIONS
- GENERAL PRECAUTIONS FOR SAFETY
- PRECAUTIONS WHEN SELECTING
- READ THE INSTRUCTION MANUAL THOROUGHLY
- PRECAUTIONS WHEN REMOVING OR INSTALLING
- PRECAUTIONS WHEN USING
- HYDRAULIC QUICK COUPLER PIPING
- BUCKET WITH HOOK
- HOOK CONDITION
- PROHIBITED OPERATIONS
- MACHINE READY FOR ATTACHMENT
- LOCATIONS
- HYDRAULIC CIRCUIT
- ATTACHMENT REMOVAL AND INSTALLATION
- ATTACHMENT OPERATIONS
- LONG TERM STORAGE
- SPECIFICATIONS
- ATTACHMENT GUIDE
- ATTACHMENT COMBINATIONS
- SELECTION OF TRACK SHOES
- RECOMMENDED ATTACHMENT OPERATIONS
- HANDLING MACHINES EQUIPPED WITH KOMTRAX
- SUPER LONG FRONT BOOM AND ARM
- OPERATION INSTRUCTION
- WORKING MODES
- TRANSPORT & STORAGE OF SUPER LONG FRONT MACHINE
- WORKING RANGE OF SUPER LONG FRONT
- MAINTENANCE
- HIGH REACH DEMOLITION MANUAL
- GENERAL VIEW OF MACHINE
- POSITION FOR ATTACHING SAFETY LABELS
- POSITION FOR ATTACHING SAFETY LABELS
- SAFETY LABELS
- CONTROL LEVERS AND SWITCHES
- SAFETY LOCK LEVER
- TRAVEL LEVERS
- WORK EQUIPMENT CONTROL LEVERS
- ATTACHMENT ROTATION (with auto-deceleration)
- INTERMEDIATE LINK CONTROL PEDAL (with auto-deceleration)
- CRUSHER CONTROL FOR OPENING AND CLOSING
- TILTING CAB MECHANISM OPERATION
- BOOM ANGLE ALARM BUZZER CANCEL SWITCH
- CEILING WINDOW WIPER SWITCH
- MACHINE OPERATIONS AND CONTROLS
- BEFORE STARTING ENGINE
- FUNCTION CHECK
- PRECAUTIONS WHEN OPERATING
- PROHIBITON OF WORK OUTSIDE SPECIFIED WORKING RANGE
- PROHIBITION OF WORK AT THE STROKE END OF A CYLINDER
- PROHIBITION OF WORK WITH HYDRAULIC BREAKER
- WHEN WORKING IN MEDIUM REACH CONFIGURATION
- OPERATION
- ADJUSTMENT OF HYDRAULIC VARIABLE GAUGE UNDERCARRIAGE, (Where Fitted)
- OPERATING WORK EQUIPMENT
- ATTACHMENT CONTROL
- RAISING WORK EQUIPMENT
- WORKING RANGE AND USING RANGE OF BOOM
- POSTURE WHEN LEAVING MACHINE
- INSTALLATION AND REMOVAL
- DEMOLITION DIGGING BOOM INSTALATION AND REMOVAL
- PROCEDURE FOR INSTALLATION AND REMOVAL OF DEMOLITION DIGGING EQUIPMENT
- REMOVAL OF HIGH REACH WORK EQUIPMENT
- FITTING DEMOLITION DIGGING EQUIPMENT.
- REMOVAL OF DEMOLITION DIGGING EQUIPMENT.
- CONNECTING DIGGING ARM TO DEMOLITION DIGGING BOOM
- MEDIUM REACH
- PURGING AIR PROCEDURES
- PURGING PROCEDURE TO REMOVE AIR FROM HYDRAULIC CYLINDER LINES.
- PROCEDURE FOR PURGING AIR FROM BOOM LOCK VALVE PPC CIRCUIT
- PURGING AIR FROM HYDRAULIC DRIFT PREVENTATIVE VALVE PPC CIRCUITS OF MID LINK AND ARM CYLINDER.
- TRANSPORTATION
- (high reach demolition equipment fitted)
- PROCEDURE FOR LOADING ON TO TRAILER
- TRANSPORTATION (high reach demolition equipment alone)
- SPECIFICATIONS
- WORKING RANGE (PC450LCD HIGH REACH)
- WORKING RANGE (PC450HRD MEDIUM REACH)
- WORKING RANGE (PC450HRD LOW REACH)
- WORKING RANGE (PC450HRD DIGGING)
- WEIGHTS AND DIMENSIONS
- TRANSPORTATION (High and Medium Reach work equipment) – PC450HRD
- TRANSPORTATION (Digging equipment) – PC450HRD
- EXPLANATION OF LIFTING CAPACITY CHART
- INDEX
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- COLOPHON
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