Komatsu PC27MR-2 Hydraulic Excavator Operation and Maintenance Manual (WEAM007100)
On a small excavator like the Komatsu PC27MR-2, you’re usually working in tight sites—utility trenches, landscaping, small foundations—often hopping between jobs in the same day. This Operation and Maintenance Manual is what I’d keep handy to set up a solid service rhythm, so the machine starts every morning, swings smooth, and doesn’t surprise you with leaks or warning lights. For example, if the boom starts moving a bit jerky or you notice slower travel, this book walks you through the basic checks and routine care to sort out simple issues before they turn into downtime.
Applications & Use Cases
- Plan preventive maintenance so filters, oils, and grease points are handled on time, not after a failure.
- Trace early wear on tracks, bucket pins, and swing area using the recommended inspection routines.
- Verify daily and weekly checks operators should do before digging, especially on rental or shared machines.
- Minimize cold-start and overheating problems by following warm-up, cool-down, and cleaning practices.
- Support troubleshooting in the field when an indicator lights up or performance drops suddenly.
FAQ
Q: Can I keep this manual on a tablet in the cab?
A: Yes, just make sure the file is saved offline so you can open it without a signal.
Q: Is it worth printing sections of this manual?
A: Printing key maintenance pages and keeping them in a binder by the machine makes routine checks much quicker.
Safety Note
Always follow the manual’s safety guidance before inspecting or servicing any part of the excavator.
📘 Show Index
Komatsu PC27MR-2 Hydraulic Excavator Index:
- 1.1 FOREWORD
- 1.2 INFORMATION ON SAFETY
- 1.3 INTRODUCTION
- 1.3.1 INTENDED USES
- 1.3.2 IMPROPER OR UNAUTHORIZED USES
- 1.3.3 MAIN CHARACTERISTICS
- 1.3.4 RUNNING-IN
- 1.3.5 DIRECTIONS OF MACHINE
- 1.4 PRODUCT IDENTIFICATION
- 1.4.1 MACHINE SERIAL NUMBER
- 1.4.2 MACHINE IDENTIFICATION PLATE AND PRODUCT IDENTIFICATION NUMBER (PIN)
- 1.4.3 ENGINE SERIAL NUMBER AND EXHAUST GAS EMISSION PLATE
- 1.4.4 TRAVEL REDUCTION GEAR SERIAL NUMBER
- 1.4.5 SWING REDUCTION GEAR SERIAL NUMBER
- 1.4.6 CAB SERIAL NUMBER
- 1.4.7 SERIAL NUMBERS AND DEALER’S ADDRESS
- TABLE OF CONTENTS
- 2.1 SAFETY, NOISE AND VIBRATION PLATES
- 2.1.1 POSITION OF THE SAFETY PLATES
- 2.1.2 PICTOGRAMS AND RELEVANT MEANINGS
- 2.1.3 POSITION OF THE NOISE PLATES ON MACHINES WITH CAB
- 2.1.4 POSITION OF THE NOISE PLATES ON MACHINES WITH CANOPY
- 2.1.5 VIBRATIONS TO WHICH THE OPERATOR IS SUBJECTED
- 2.2 GENERAL PRECAUTIONS
- 2.2.1 GENERAL SAFETY RULES
- 2.2.2 SAFETY DEVICES AND GUARDS
- 2.2.3 CLOTHING AND PERSONAL PROTECTION ITEMS
- 2.2.4 UNAUTHORIZED MODIFICATIONS
- 2.2.5 LEAVING THE OPERATOR’S SEAT
- 2.2.6 GETTING ON AND OFF THE MACHINE
- 2.2.7 PREVENTING FIRES DUE TO FUEL AND OIL
- 2.2.8 PREVENTING BURNS
- 2.2.9 PREVENTING DAMAGE DUE TO ASBESTOS POWDER
- 2.2.10 PREVENTING DAMAGE CAUSED BY THE WORK EQUIPMENT
- 2.2.11 FIRE EXTINGUISHERS AND FIRST AID KIT
- 2.2.12 PRECAUTIONS CONCERNING THE CAB STRUCTURE
- 2.2.13 PRECAUTIONS CONCERNING THE EQUIPMENT
- 2.3 PRECAUTIONS TO BE TAKEN BEFORE STARTING THE ENGINE
- 2.3.1 SAFETY ON THE WORK SITE
- 2.3.2 FIRE PREVENTION
- 2.3.3 PRECAUTIONS TO BE TAKEN FOR THE OPERATOR’S CAB
- 2.3.4 ROOM VENTILATION
- 2.3.5 PRECAUTIONS TO BE TAKEN FOR THE LIGHTS
- 2.3.6 CLEANING THE WINDOWS – CHECKING THE WINDSHIELD WIPER BLADES
- 2.4 PRECAUTIONS TO BE TAKEN WHEN WORKING
- 2.4.1 STARTING THE ENGINE
- 2.4.2 CHECK THE DIRECTION BEFORE STARTING THE MACHINE
- 2.4.3 CHECKS FOR TRAVELLING IN REVERSE
- 2.4.4 MOVING THE MACHINE
- 2.4.5 MOVING ON SLOPES
- 2.4.6 WORKING ON SLOPES
- 2.4.7 UNAUTHORIZED OPERATIONS
- 2.4.8 PREVENTING ELECTROCUTION
- 2.4.9 VISIBILITY
- 2.4.10 WORKING ON ICY OR SNOW-COVERED SURFACES
- 2.4.11 PREVENTING DAMAGE CAUSED BY THE WORK EQUIPMENT
- 2.4.12 WORKING ON LOOSE GROUND
- 2.4.13 PARKING THE MACHINE
- 2.5 TRANSPORTING THE MACHINE ON MOTOR VEHICLES
- 2.5.1 LOADING AND UNLOADING
- 2.5.2 TRANSPORT
- 2.6 BATTERY
- 2.6.1 PREVENTING RISKS THAT MAY BE DUE TO THE BATTERY
- 2.6.2 STARTING WITH BOOSTER CABLES
- 2.7 PRECAUTIONS FOR THE REMOVAL
- 2.8 PRECAUTIONS FOR MAINTENANCE
- 2.8.1 WARNING PLATES
- 2.8.2 TOOLS
- 2.8.3 PERSONNEL
- 2.8.4 EQUIPMENT
- 2.8.5 WORKING UNDER THE MACHINE
- 2.8.6 CLEANING THE MACHINE
- 2.8.7 USE OF THE ENGINE DURING MAINTENANCE OPERATIONS
- 2.8.8 PERIODICAL CHANGE OF THE PARTS THAT ARE CRITICAL FOR SAFETY
- 2.8.9 STOP THE ENGINE BEFORE CARRY ING OUT ANY MAINTENANCE OPER ATION OR INSPECTION
- 2.8.10 RULES TO BE FOLLOWED DURING FUEL OR OIL TOPPING UP
- 2.8.11 CHECKING THE COOLANT LEVEL IN THE RADIATOR
- 2.8.12 USING LAMPS
- 2.8.13 PRECAUTIONS CONCERNING THE BATTERY AND THE ALTERNATOR
- 2.8.14 PRECAUTIONS CONCERNING THE STARTER
- 2.8.15 HANDLING HIGH-PRESSURE PIPES
- 2.8.16 PRECAUTIONS TO BE TAKEN WHEN HANDLING HIGH-PRESSURE OIL
- 2.8.17 PRECAUTIONS FOR MAINTENANCE OPERATIONS AT HIGH TEMPERA TURES AND HIGH PRESSURE
- 2.8.18 PRECAUTIONS TO BE TAKEN WHEN USING HIGH-PRESSURE GREASE TO ADJUST THE TRACK TENSION
- 2.8.19 DO NOT REMOVE THE SHOCK ABSORBING SPRING FROM THE SHOCK ABSORBER UNIT
- 2.8.20 HYDRAULIC ACCUMULATOR
- 2.8.21 COOLING FAN AND BELT
- 2.8.22 WASTE MATERIALS
- 2.8.23 COMPRESSED AIR
- 2.8.24 PRECAUTIONS FOR THE USE OF THE synthetic biodegrada ble oil type HEES
- 3.1 MACHINE VIEW ILLUSTRATIONS
- 3.1.1 OVERALL MACHINE VIEW
- 3.1.2 CONTROLS AND GAUGES
- 3.2 DETAILED CONTROLS AND GAUGES
- 3.2.1 MONITORING SYSTEM
- 3.2.1.1 EMERGENCY MONITORS
- 3.2.1.2 METER DISPLAY PORTION
- 3.2.1.3 PILOT LAMPS
- 3.2.1.4 MONITOR SWITCHES PORTION
- 3.2.2 SWITCHES
- 3.2.3 CONTROL LEVERS AND PEDALS
- 3.2.4 WINDSHIELD (Machines equipped with cab)
- 3.2.5 SLIDING DOOR (Machines equipped with cab)
- 3.2.6 SLIDING WINDOW (Machines equipped with cab)
- 3.2.7 EMERGENCY ESCAPE HAMMER (Machines equipped with cab)
- 3.2.8 COVER WITH LOCK
- 3.2.9 ENGINE REAR COVER
- 3.2.10 COOLING COVER
- 3.2.11 MUD COVER
- 3.2.12 METHOD OF OPENING (TILTING) FLOOR
- 3.2.13 FUSE
- 3.2.14 BLOCK FUSE
- 3.2.15 OPERATION MANUAL STORAGE
- 3.2.16 TOOL BOX
- 3.2.17 GREASE GUN HOLDER
- 3.2.18 ASHTRAY (Machines equipped with cab)
- 3.3 MACHINE OPERATIONS AND CONTROLS
- 3.3.1 BEFORE STARTING ENGINE
- 3.3.1.1 WALK-AROUND CHECKS
- 3.3.1.2 CHECKS BEFORE STARTING
- 3.3.1.3 ADJUSTMENT
- 3.3.1.4 OPERATIONS BEFORE STARTING ENGINE
- 3.3.1.5 STARTING ENGINE
- 3.3.2 AFTER STARTING ENGINE
- 3.3.2.1 BREAKING-IN THE NEW MACHINE
- 3.3.2.2 WARMING-UP OPERATION
- 3.3.3 STOPPING THE ENGINE
- 3.3.4 MACHINE OPERATION
- 3.3.4.1 PREPARATIONS FOR MOVING THE MACHINE OFF
- 3.3.4.2 MOVING MACHINE FORWARD
- 3.3.4.3 MOVING MACHINE BACKWARD
- 3.3.4.4 STOPPING MACHINE
- 3.3.5 STEERING THE MACHINE
- 3.3.6 SWINGING
- 3.3.7 WORK EQUIPMENT CONTROLS AND OPERATIONS
- 3.3.8 PROHIBITED OPERATIONS
- 3.3.9 GENERAL OPERATION INFORMATION
- 3.3.10 TRAVELING ON SLOPES
- 3.3.11 ESCAPE FROM MUD
- 3.3.12 WORK POSSIBLE USING COMPACT HYDRAULIC EXCAVATOR
- 3.3.13 CHANGING THE BUCKET
- 3.3.14 PARKING MACHINE
- 3.3.15 CHECK AFTER SHUT OFF ENGINE
- 3.3.16 MACHINE INSPECTION AFTER DAILY WORK
- 3.3.17 LOCKING
- 3.3.18 RUBBER SHOES AND ROAD LINERS (Machine equipped with rubber shoe or road liner)
- 3.3.18.1 RUBBER SHOES AND ROAD LINERS INFORMATION
- 3.3.18.2 WARRANTY FOR RUBBER SHOES AND ROAD LINERS
- 3.3.18.3 USING RUBBER SHOES AND ROAD LINERS
- 3.4 TRANSPORTATION
- 3.4.1 TRANSPORTATION PROCEDURE
- 3.4.2 LOADING AND UNLOADING WITH TRAILER
- 3.4.3 LIFTING MACHINE
- 3.5 COLD WEATHER OPERATION
- 3.5.1 COLD WEATHER OPERATION INFORMATION
- 3.5.1.1 FUEL AND LUBRICANTS
- 3.5.1.2 COOLING SYSTEM COOLANT
- 3.5.1.3 BATTERY
- 3.5.2 CAB HEATER IN COLD WEATHER (Machines equipped with cab)
- 3.5.3 AFTER DAILY WORK COMPLETION
- 3.5.4 AFTER COLD WEATHER SEASON
- 3.6 LONG TERM STORAGE
- 3.6.1 BEFORE STORAGE
- 3.6.2 DURING STORAGE
- 3.6.3 AFTER STORAGE
- 3.7 TROUBLES AND ACTIONS
- 3.7.1 RUNNING OUT OF FUEL
- 3.7.2 PHENOMENA THAT ARE NOT FAILURES
- 3.7.3 TOWING THE MACHINE
- 3.7.4 SEVERE JOB CONDITION
- 3.7.5 DISCHARGED BATTERY
- 3.7.5.1 BATTERY REMOVAL AND INSTALLATION
- 3.7.5.2 BATTERY CHARGES
- 3.7.5.3 STARTING ENGINE WITH BOOSTER CABLES
- 3.7.6 OTHER TROUBLE
- 3.7.6.1 ELECTRICAL SYSTEM
- 3.7.6.2 CHASSIS
- 3.7.6.3 ENGINE
- 4.1 MAINTENANCE INFORMATION
- 4.2 LUBRICANTS, COOLANT AND FILTERS
- 4.2.1 HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
- 4.2.1.1 OIL
- 4.2.1.2 FUEL
- 4.2.1.3 COOLING SYSTEM COOLANT
- 4.2.1.4 GREASE
- 4.2.1.5 CARRYING OUT KOWA (KOMATSU OIL WEAR ANALYSIS)
- 4.2.1.6 OIL AND FUEL STORAGE
- 4.2.1.7 FILTERS
- 4.2.2 ELECTRIC SYSTEM MAINTENANCE
- 4.2.3 HANDLING HYDRAULIC SYSTEM
- 4.3 WEAR PARTS
- 4.4 LUBRICANTS, FUEL AND COOLANT SPECIFICATIONS
- 4.4.1 HOMOLOGATED HEES SYNTHETIC BIODEGRADABLE LUBRICANTS
- 4.5 TIGHTENING TORQUE SPECIFICATIONS
- 4.5.1 TIGHTENING TORQUE LIST
- 4.6 LUBRICATION
- 4.6.1 LUBRICATION DIAGRAM
- 4.7 SAFETY CRITICAL PARTS
- 4.7.1 SAFETY CRITICAL PARTS LIST
- 4.8 MAINTENANCE SCHEDULE
- 4.8.1 MAINTENANCE SCHEDULE CHART
- 4.8.2 MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER
- 4.8.2.a CHANGING THE HYDRAULIC OIL FIL TER
- 4.8.2.b CHANGING THE HYDRAULIC OIL
- 4.9 MAINTENANCE PROCEDURE
- 4.9.1 WHEN REQUIRED
- 4.9.1.a CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT
- 4.9.1.b CLEAN INSIDE OF COOLING SYSTEM
- 4.9.1.c CHECK LEVEL OF BATTERY ELECTROLYTE
- 4.9.1.d CLEAN WATER SEPARATOR ELEMENT
- 4.9.1.e DRAIN WATER AND SEDIMENT FROM FUEL TANK
- 4.9.1.f CHECK AND TIGHTEN TRACK SHOE BOLTS (Machine equipped with road liner, steel shoe)
- 4.9.1.g CHECK AND ADJUST TRACK TENSION (Machine equipped with road liner, steel shoe)
- 4.9.1.h CHECK, RUBBER SHOES OR ROAD LINERS (Machine equipped with rubber shoes, road liner)
- 4.9.1.i CHECK AND ADJUST RUBBER SHOE TENSION (Machine equipped with rubber shoes)
- 4.9.1.j REPLACE RUBBER SHOES (Machine equipped with rubber shoes)
- 4.9.1.k REPLACE ROAD LINERS (Machine equipped with road liner)
- 4.9.1.l CHECK WINDOW WASHER FLUID LEVEL, ADD FLUID (Machine equipped with cab)
- 4.9.1.m CHECK, CLEAN AND LUBRICATE CAB SLIDE DOOR RAIL AND ROLLER (Machine equipped with cab)
- 4.9.1.n LUBRICATING
- 4.9.1.o BLEEDING AIR FROM HYDRAULIC SYSTEM
- 4.9.2 CHECK BEFORE STARTING
- 4.9.3 EVERY 500 HOURS MAINTENANCE
- 4.9.3.a LUBRICATING
- 4.9.3.b CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE
- 4.9.3.c REPLACE FUEL FILTER CARTRIDGE
- 4.9.3.d CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL
- 4.9.3.e CLEAN AND INSPECT RADIATOR FINS AND OIL COOLER FINS
- 4.9.3.f CHECK AND ADJUST COOLING FAN BELT TENSION
- 4.9.4 EVERY 1000 HOURS MAINTENANCE
- 4.9.4.a REPLACE HYDRAULIC OIL FILTER ELEMENT
- 4.9.4.b CHANGE OIL IN FINAL DRIVE CASE
- 4.9.4.c CHECK ENGINE VALVE CLEARANCE, ADJUST
- 4.9.5 EVERY 2000 HOURS MAINTENANCE
- 4.9.5.a CHANGE OIL IN HYDRAULIC TANK, CLEAN STRAINER
- 4.9.5.b CHECK ALTERNATOR, STARTING MOTOR
- 5.1 SPECIFICATIONS
- 5.2 LIFTING CAPACITIES
- 5.2.1 LIFTING CAPACITIES (WITH CANOPY)
- 5.2.2 LIFTING CAPACITIES (WITH CABIN)
- 6.1 ATTACHMENTS AND OPTIONS – GENERAL INFORMATION
- 6.1.1 SAFETY FIRST
- 6.1.2 ATTACHMENT INSTALLATION
- 6.1.3 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT
- 6.1.3.1 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT
- 6.2 MACHINE READY FOR ATTACHMENT
- 6.2.1 LOCATIONS
- 6.2.2 HYDRAULIC CIRCUIT
- 6.2.2.1 ASSEMBLYING AND CONNECTING THE EQUIPMENT
- 6.2.2.2 MAINTENANCE
- 6.2.2.3 BLEEDING AIR
- 6.3 ATTACHMENT OPERATIONS
- 6.3.1 LONG TERM STORAGE
- 6.3.2 SPECIFICATIONS
- 6.4 ATTACHMENT GUIDE
- 6.4.1 ATTACHMENT COMBINATIONS
- 6.5 RECOMMENDED ATTACHMENT OPERATIONS
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