Komatsu PC1250-11E0, PC1250SP-11E0 Hydraulic Excavator Operation and Maintenance Manual (EENAM03932)
On a big Komatsu PC1250 working in quarry faces, mass excavation, or heavy loading, this Operation and Maintenance Manual is what I’d use to keep the machine earning instead of parked. It walks you through the daily and scheduled checks so you can build a solid service rhythm, spot leaks, loose hardware, and abnormal noises before they turn into failures. If, for example, the boom feels sluggish or the swing gets jerky, this manual helps you verify basic settings, inspect filters and fluid condition, and rule out simple causes before calling in major repairs.
Applications & Use Cases
- Plan preventive maintenance so services are grouped logically and downtime is easier to schedule around production.
- Set up operator walk‑around routines to trace early wear on undercarriage, boom pins, and hoses.
- Confirm correct basic adjustments after a repair, so the machine tracks straight and cycles smoothly under load.
- Use as a checklist in the field to verify what’s been inspected, greased, or replaced on each shift.
- Train new operators on how to warm up, shut down, and park the machine to avoid hard starts and premature wear.
FAQ
Q: Can I keep this manual on a tablet in the cab?
A: Yes, it’s practical to use digitally; zooming in on diagrams and search functions make checks faster on site.
Q: Is it worth printing parts of it?
A: Many mechanics print the inspection and service pages, laminate them, and keep them in the service truck for quick reference.
Safety Note
Always lock out, tag out, and relieve system pressure before inspecting, adjusting, or working around this excavator.
📘 Show Index
Komatsu PC1250-11E0, PC1250SP-11E0 Hydraulic Excavator Index:
- FOREWORD
- CONTENTS
- READ THIS MANUAL
- KOMATSU MACHINE OPERATOR PRIVACY POLICY
- SAFETY INFORMATION
- NOISE
- VIBRATION LEVELS
- VIBRATION – OPERATING CONDITION
- GUIDE TO REDUCE VIBRATION LEVELS ON MACHINE
- INTRODUCTION
- MAIN USE OF MACHINE
- DIRECTIONS OF MACHINE
- VISIBILITY FROM OPERATOR’S SEAT
- ENGINE TECHNOLOGY TO CONFORM EXHAUST GAS EMISSION
- PRODUCT INFORMATION
- LOCATION OF PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
- LOCATION OF ENGINE NUMBER PLATE
- FLUORINATED GREENHOUSE GASES
- SERVICE METER LOCATION
- YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR
- SERIAL PLATE
- DECLARATION OF CONFORMITY
- ABBREVIATION LIST
- SAFETY
- SAFETY LABELS
- LOCATION OF SAFETY LABELS
- CONTENTS OF SAFETY LABELS
- GENERAL PRECAUTIONS COMMON TO OPERATION AND MAINTENANCE
- PRECAUTIONS BEFORE STARTING OPERATION
- PREPARATIONS FOR SAFE OPERATION
- PRECAUTIONS TO PREVENT FIRE
- PRECAUTIONS WHEN GETTING ON OR OFF MACHINE
- DO NOT GET CAUGHT IN WORK EQUIPMENT
- PRECAUTIONS RELATED TO PROTECTIVE STRUCTURES
- PROTECTION AGAINST FALLING, FLYING OR INTRUDING OBJECTS
- UNAUTHORIZED MODIFICATION
- PRECAUTIONS RELATED TO ATTACHMENTS AND OPTIONS
- PRECAUTIONS RELATED TO CAB GLASS
- PRECAUTIONS WHEN RUNNING ENGINE INSIDE BUILDING
- PRECAUTIONS FOR OPERATION
- PRECAUTIONS FOR JOBSITE
- START ENGINE
- PRECAUTIONS FOR OPERATION
- PRECAUTIONS FOR TRANSPORTATION
- TOWING AND BEING TOWED
- LIFTING OPERATION BY USING BUCKET WITH HOOK
- PRECAUTIONS FOR MAINTENANCE
- PRECAUTIONS BEFORE STARTING INSPECTION AND MAINTENANCE
- PRECAUTIONS FOR CHECK AND MAINTENANCE
- OPERATION
- GENERAL VIEW
- MACHINE EQUIPMENT NAME
- CAB EQUIPMENT NAMES
- CONTROLS AND GAUGES NAMES
- EXPLANATION OF COMPONENTS
- EXPLANATION OF MACHINE MONITOR EQUIPMENT
- SWITCHES
- CONTROL LEVERS AND PEDALS
- OTHER EQUIPMENT
- MACHINE OPERATIONS AND CONTROLS
- CHECKS AND ADJUSTMENT BEFORE STARTING ENGINE
- METHOD FOR STARTING ENGINE
- METHOD FOR OPERATIONS AND CHECKS AFTER STARTING ENGINE
- METHOD FOR STOPPING ENGINE
- METHOD FOR STARTING MACHINE (TRAVEL FORWARD AND REVERSE) AND STOPPING MACHINE
- METHOD FOR STEERING MACHINE
- METHOD FOR SWINGING MACHINE
- METHOD FOR OPERATING WORK EQUIPMENT
- HANDLE WORKING MODE
- PROHIBITED OPERATIONS
- PRECAUTIONS FOR OPERATION
- PRECAUTIONS FOR WORKING ON SLOPE
- METHOD FOR ESCAPING FROM MUD
- RECOMMENDED APPLICATIONS
- EFFECTIVE USE OF HYDRAULIC EXCAVATOR
- METHOD FOR CHANGING BUCKET
- METHOD FOR PARKING MACHINE
- METHOD FOR CHECKING AFTER FINISHING WORK
- LOCK
- HANDLE AIR CONDITIONER
- EXPLANATION OF AIR CONDITIONER EQUIPMENT
- METHOD FOR OPERATING AIR CONDITIONER
- HANDLING RADIO
- EXPLANATION OF RADIO EQUIPMENT
- METHOD FOR CONTROLLING RADIO
- STOW ANTENNA
- KomVision
- PRECAUTIONS WHEN USING KomVision
- MONITOR DISPLAY
- HANDLE ANCHOR POINT FOR TIE-OFF
- TRANSPORTATION
- PRECAUTIONS FOR TRANSPORTING MACHINE
- SELECT TRANSPORTATION METHOD
- METHOD FOR LIFTING MACHINE
- PRECAUTIONS FOR LOADING MACHINE
- MACHINE CONFIGURATION FOR TRANSPORTATION
- COLD WEATHER OPERATION
- COLD WEATHER OPERATION INFORMATION
- PRECAUTIONS AFTER DAILY WORK COMPLETION IN COLD WEATHER
- AFTER COLD WEATHER SEASON
- PRECAUTIONS FOR LONG-TERM STORAGE
- PREPARATION FOR LONG-TERM STORAGE
- MAINTENANCE DURING LONG-TERM STORAGE
- STARTING MACHINE AFTER LONG-TERM STORAGE
- TROUBLES AND ACTIONS
- ACTIONS WHEN RUNNING OUT OF FUEL
- PHENOMENA THAT ARE NOT FAILURES
- PRECAUTIONS FOR TOWING MACHINE
- PRECAUTIONS FOR SEVERE JOB CONDITION
- PRECAUTIONS FOR DISCHARGED BATTERY
- OTHER TROUBLE
- MAINTENANCE
- PRECAUTIONS FOR MAINTENANCE
- CHECK SERVICE METER READING
- KOMATSU GENUINE REPLACEMENT PARTS
- KOMATSU GENUINE LUBRICANTS
- ALWAYS USE CLEAN WASHER FLUID
- FRESH AND CLEAN LUBRICANTS
- CHECK DRAINED OIL AND USED FILTER
- PRECAUTIONS FOR REFILLING OIL OR FUEL
- WELDING INSTRUCTIONS
- DO NOT DROP THINGS INSIDE MACHINE
- PRECAUTIONS FOR KDPF
- DUSTY JOBSITES
- AVOID MIXING OIL
- LOCK INSPECTION COVERS
- BLEED AIR FROM HYDRAULIC CIRCUIT
- PRECAUTIONS WHEN INSTALLING HYDRAULIC HOSES
- CHECKS AFTER INSPECTION AND MAINTENANCE
- FUEL AND LUBRICANTS TO MATCH THE AMBIENT TEMPERATURE
- OUTLINE OF MAINTENANCE
- HANDLE OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
- HANDLE ELECTRICAL COMPONENTS
- STANDARD TIGHTENING TORQUE FOR BOLTS AND NUTS
- MAINTENANCE SCHEDULE
- MAINTENANCE SCHEDULE TABLE
- MAINTENANCE INTERVAL WHEN DIESEL FUEL MIXED WITH BIO-FUEL IS USED
- MAINTENANCE PROCEDURE
- INITIAL 100 HOURS MAINTENANCE (ONLY AFTER THE FIRST 100 HOURS)
- INITIAL 500 HOURS MAINTENANCE (ONLY AFTER THE FIRST 500 HOURS)
- WHEN REQUIRED
- CHECK BEFORE YOU START OPERATION
- EVERY 10 HOURS MAINTENANCE
- EVERY 100 HOURS MAINTENANCE
- EVERY 250 HOURS MAINTENANCE
- EVERY 500 HOURS MAINTENANCE
- EVERY 1000 HOURS MAINTENANCE
- EVERY 2000 HOURS MAINTENANCE
- EVERY 4000 HOURS MAINTENANCE
- EVERY 4500 HOURS MAINTENANCE
- EVERY 5000 HOURS MAINTENANCE
- EVERY 8000 HOURS MAINTENANCE
- EVERY 9000 HOURS MAINTENANCE
- EVERY 6 MONTHS MAINTENANCE
- SPECIFICATIONS
- SPECIFICATIONS
- SPECIFICATIONS: PC1250-11E0
- SPECIFICATIONS: PC1250SP-11E0
- ATTACHMENTS AND OPTIONS
- PRECAUTIONS FOR USING ATTACHMENT AND OPTIONS
- PRECAUTIONS WHEN SELECTING
- READ THE OPERATION AND MAINTENANCE MANUAL THOROUGHLY
- PRECAUTIONS WHEN REMOVING AND INSTALLING
- PRECAUTIONS FOR USING
- ATTACHMENTS AND OPTIONS
- INSTALL ATTACHMENT
- TRACK SHOES SELECTION
- HANDLE THE HYDRAULICALLY OPERATED STAIRWAY
- PROCEDURE FOR OPERATING THE HYDRAULICALLY OPERATED STAIRWAY
- ACTIONS IF MACHINE DOES NOT MOVE BY PROXIMITY SWITCH FAILURE ETC
- METHOD FOR CHECKING AND ADJUSTING PROXIMITY SWITCH
- ACTIONS IF PROXIMITY SWITCH HAS FAILED
- HANDLE EXTERNAL POWER SUPPLY ENGINE PREHEATER
- INSTALLATION PROCEDURES FOR EXTERNAL POWER SUPPLY SYSTEM FOR EXTERNAL POWER SUPPLY ENGINE PREHEATER
- FABRICATE EXTERNAL POWER SUPPLY CABLE
- INSTALL EXTERNAL POWER SUPPLY SYSTEM
- PROCEDURE FOR HANDLING EXTERNAL POWER SUPPLY ENGINE PREHEATER
- METHOD FOR OPERATING EXTERNAL POWER SUPPLY HEATER
- WHEN YOU USE THE EXTERNAL POWER SUPPLY ENGINE PREHEATER
- NO USE OF PREHEATING HEATER
- HANDLE MOVABLE DIESEL PREHEATER
- GENERAL VIEW
- EXPLANATION OF MOVABLE DIESEL PREHEATER EQUIPMENT
- METHOD FOR STARTING OPERATION
- STOP MACHINE
- IF FUEL IS NOT SUPPLIED NORMALLY
- CAUSE OF TROUBLE AND ACTIONS
- RADIO(Bluetooth®)
- RADIO EQUIPMENT
- OPERATE RADIO
- RADIO SETTING
- MACHINE WITH LOADING SHOVEL SPECIFICATION
- EXPLANATION OF COMPONENTS
- SWITCHES
- HANDLE ANCHOR POINT FOR TIE-OFF
- FUSE
- MACHINE OPERATIONS AND CONTROLS
- METHOD FOR OPERATING WORK EQUIPMENT
- PRECAUTIONS DURING OPERATION
- RECOMMENDED APPLICATIONS
- DIGGING WORK
- LOADING WORK
- PRECAUTIONS WHEN YOU DISASSEMBLE MACHINE
- TRANSPORTATION
- MACHINE CONFIGURATION FOR TRANSPORTATION
- CONSUMABLE PARTS
- PERIODIC MAINTENANCE
- CHECKS BEFORE STARTING
- METHOD FOR CHECKING OIL LEVEL IN HYDRAULIC TANK, ADDING OIL
- EVERY 10 HOURS MAINTENANCE
- EVERY 5000 HOURS MAINTENANCE
- METHOD FOR CHANGING OIL IN HYDRAULIC TANK, CLEANING HYDRAULIC TANK STRAINER
- EVERY 6 MONTHS MAINTENANCE
- CHECK ANCHOR POINT FOR TIE-OFF
- SPECIFICATIONS: PC1250-11
- COMBINATION OF WORK EQUIPMENT
- WORKING RANGE DRAWINGS: PC1250-11
- REPLACEMENT PARTS
- DEFINED LIFE PARTS
- CONSUMABLE PARTS
- RECOMMENDED FUEL, COOLANT, AND LUBRICANT
- LUBRICATION CHART
- USE OF FUEL, COOLANT AND LUBRICANTS TO ACCORDING TO AMBIENT TEMPERATURE
- RECOMMENDED BRANDS AND QUALITIES OTHER THAN KOMATSU GENUINE OILS
- INDEX
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