Komatsu PC20MR-3 Hydraulic Excavator Operation and Maintenance Manual (TEN00550-00)

On a small excavator like the Komatsu PC20MR-3, you’re usually working tight sites—service hookups, landscaping, light utility work—often on and off trailers all week. This operation and maintenance manual is what I’d keep handy to set a solid service rhythm, so the machine starts every morning and the hydraulics stay predictable. If, for example, the boom starts moving a bit jerky or the slew feels weak, I’d use this book to walk through the basic checks in order before calling in heavier diagnostics.

Applications & Use Cases

• Plan routine servicing so you can group greasing, filter changes, and inspections around your work schedule instead of reacting to failures.
• Trace early hydraulic issues by following the recommended checks for leaks, hose condition, and control feel.
• Inspect undercarriage and structure on a schedule to catch loose hardware, cracked components, or uneven wear.
• Verify correct operating practices for new operators so they don’t abuse the swing, blade, or travel system.
• Minimize cold-start and transport problems by following the manual’s guidance on warm-up, shutdown, and tie-down points.

FAQ

Q: Can I keep this manual on a tablet in the cab?

A: Yes, as long as the file is readable offline; many techs use a rugged tablet or phone so it’s available right at the machine.

Q: Is it worth printing parts of it?

A: I’d print the daily/weekly check pages and keep them in a plastic sleeve in the toolbox for quick reference and notes.

Safety Note

Always follow the manual’s safety instructions before inspecting, adjusting, or working under any raised component.

Komatsu PC20MR-3 Hydraulic Excavator Index:

• COVER
• FOREWORD
  • FOREWORD
  • SAFETY INFORMATION
  • INTRODUCTION
    • DIRECTIONS OF MACHINE
    • PROTECTIVE STRUCTURE
  • PRODUCT INFORMATION
    • PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
    • ENGINE SERIAL NUMBER PLATE AND ITS LOCATION
    • EMISSION CONTROL INFORMATION LABEL AND ITS LOCATION
    • SERVICE METER LOCATION
    • YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR
  • CONTENTS
• SAFETY
  • SAFETY
  • SAFETY LABELS
    • LOCATION OF SAFETY LABELS
    • SAFETY LABELS
  • GENERAL PRECAUTIONS
  • SAFETY MACHINE OPERATION
    • STARTING ENGINE
    • OPERATION
    • TRANSPORTATION
    • BATTERY
    • TOWING
    • LIFTING OBJECTS WITH BUCKET
  • SAFETY MAINTENANCE INFORMATION
• OPERATION
  • MACHINE VIEW ILLUSTRATIONS
    • OVERALL MACHINE VIEW
    • CONTROLS AND GAUGES
  • DETAILED CONTROLS AND GAUGES
    • MONITORING SYSTEM
    • SWITCHES
    • CONTROL LEVERS AND PEDALS
    • WINDSHIELD
    • SLIDING DOOR
    • SLIDING WINDOW
    • EMERGENCY ESCAPE HAMMER
    • CAP WITH LOCK
    • ENGINE REAR COVER
    • COOLING COVER
    • FRONT RIGHT COVER
    • METHOD OF OPENING (TILTING) FLOOR
    • AUXILIARY ELECTRIC POWER
    • FUSE
    • BLOCK FUSE
    • OPERATION MANUAL STORAGE
    • TOOL BOX
    • GREASE GUN HOLDER
    • ASHTRAY
    • HANDLING MACHINES EQUIPPED WITH KOMTRAX
  • MACHINE OPERATIONS AND CONTROLS
    • BEFORE STARTING ENGINE
    • STARTING ENGINE
    • AFTER STARTING ENGINE
    • STOPPING THE ENGINE
    • MACHINE OPERATION
    • STEERING THE MACHINE
    • SWINGING
    • WORK EQUIPMENT CONTROLS AND OPERATIONS
    • PROHIBITED OPERATIONS
    • GENERAL OPERATION INFORMATION
    • TRAVELING ON SLOPES
    • ESCAPE FROM MUD
    • WORK POSSIBLE USING COMPACT HYDRAULIC EXCAVATOR
    • BUCKET REPLACEMENT
    • PARKING MACHINE
    • MACHINE INSPECTION AFTER DAILY WORK
    • LOCKING
    • RUBBER SHOES (MACHINE WITH RUBBER SHOES ONLY)
  • TRANSPORTATION
    • TRANSPORTATION PROCEDURE
    • LOADING AND UNLOADING WITH TRAILER
    • LIFTING MACHINE
  • COLD WEATHER OPERATION
    • COLD WEATHER OPERATION INFORMATION
    • CAB HEATER IN COLD WEATHER
    • AFTER DAILY WORK COMPLETION
    • AFTER COLD WEATHER SEASON
  • LONG TERM STORAGE
    • BEFORE STORAGE
    • DURING STORAGE
    • AFTER STORAGE
  • TROUBLES AND ACTIONS
    • RUNNING OUT OF FUEL
    • PHENOMENA THAT ARE NOT FAILURES
    • TOWING THE MACHINE
    • SEVERE JOB CONDITION
    • DISCHARGED BATTERY
    • OTHER TROUBLE
• MAINTENANCE
  • MAINTENANCE INFORMATION
  • OUTLINE OF SERVICE
    • HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
    • ELECTRIC SYSTEM MAINTENANCE
    • HANDLING HYDRAULIC SYSTEM
  • WEAR PARTS
    • WEAR PARTS LIST
  • RECOMMENDED FUEL, COOLANT, AND LUBRICANT
  • TIGHTENING TORQUE SPECIFICATIONS
    • TIGHTENING TORQUE LIST
  • SAFETY CRITICAL PARTS
    • SAFETY CRITICAL PARTS LIST
  • MAINTENANCE SCHEDULE
    • MAINTENANCE SCHEDULE CHART
    • MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER
  • MAINTENANCE PROCEDURE
    • WHEN REQUIRED
    • CHECK BEFORE STARTING
    • EXPLANATION OF SYMBOLS FOR LUBRICATION STANDARD TABLE
    • EVERY 500 HOURS MAINTENANCE
    • EVERY 1000 HOURS MAINTENANCE
    • EVERY 1500 HOURS MAINTENANCE
    • EVERY 2000 HOURS MAINTENANCE
• SPECIFICATIONS
  • SPECIFICATIONS
• ATTACHMENTS, OPTIONS
  • ATTACHMENTS AND OPTIONS – GENERAL INFORMATION
    • SAFETY FIRST
    • ATTACHMENT INSTALLATION
  • BUCKET WITH HOOK
    • HOOK CONDITION
    • PROHIBITED OPERATIONS
  • WINDSHIELD WASHER
    • WINDSHIELD WASHER OPERATION
    • CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID
  • MACHINE READY FOR ATTACHMENT
    • LOCATIONS
    • HYDRAULIC CIRCUIT
    • ATTACHMENT OPERATIONS
    • LONG TERM STORAGE
    • SPECIFICATIONS
  • ATTACHMENT GUIDE
    • ATTACHMENT COMBINATIONS
  • RECOMMENDED ATTACHMENT OPERATIONS
    • HYDRAULIC BREAKER
• INDEX

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