Komatsu PC270LC-7L Hydraulic Excavator Operation and Maintenance Manual (CEAM008703)
On a PC270LC-7L that spends its life digging foundations, loading trucks, or trenching in rough sites, this Operation and Maintenance Manual is what I use to keep the machine predictable and available. It lays out a sensible rhythm for daily and scheduled checks so you can spot loose hardware, hose chafe, or odd sounds before they turn into downtime. If, for example, the boom feels sluggish at the end of a long shift, I’ll lean on this manual to walk the operator through proper inspection points before we assume a major hydraulic fault.
Applications & Use Cases
- Plan preventive maintenance so filters, pins, and wear components are serviced before they cause failures.
- Set up daily walk‑around checks that operators can follow to catch leaks, damage, or abnormal play early.
- Verify adjustment and lubrication points when you’re chasing uneven swing, jerky controls, or rough travel.
- Align service work with job schedules to group tasks and minimize time the excavator is off the grade.
- Train new operators on correct warm‑up, shutdown, and operating habits that reduce long‑term stress on the machine.
FAQ
Q: Can I keep this manual on a tablet in the field?
A: Yes, it’s practical to use digitally so you can zoom diagrams and search terms while standing next to the machine.
Q: Is it still worth printing parts of it?
A: I’d print the inspection and service checklists to keep in the cab or shop, where they’ll get used and marked up.
Safety Note
Always follow the manual’s safety precautions and lockout steps before inspecting or servicing any part of the excavator.
📘 Show Index
Komatsu PC270LC-7L Hydraulic Excavator Index:
- INTRODUCTION
- FOREWORD
- SAFETY INFORMATION
- Signal Words
- Other Signal Words
- INTRODUCTION
- DIRECTIONS OF MACHINE
- PRODUCT INFORMATION
- Machine Serial Number Plate And Its Location
- Engine Serial Number Plate And Its Location
- Service Meter Location
- Your Machine Serial Numbers And Distributor
- TABLE OF CONTENTS
- SAFETY
- SAFETY LABELS
- Position For Attaching Safety Labels
- Safety Labels
- SAFETY INFORMATION
- Safety Rules
- If Abnormalities Are Found
- Working Wear And Personal Protective Items
- Fire Extinguisher And First Aid Kit
- Safety Equipment
- Keep Machine Clean
- Keep Operator’s Compartment Clean
- Leaving Operator’s Seat With Lock
- Handrails And Steps
- Mounting And Dismounting
- No Persons On Attachments
- Burn Prevention
- Fire Prevention And Explosion Prevention
- Windshield Washer Fluid
- Falling Objects, Flying Objects And Intruding Objects Prevention
- Attachment Installation
- Attachment Combinations
- Cab Widow Glass
- Unauthorized Modifications
- Safety At Jobsite
- Working On Loose Ground
- Distance To High Voltage Cables
- Ensure Good Visibility
- Ventilation For Enclosed Area
- Signalman’s Signal And Signs
- Emergency Exit From Operator’s Cab
- Asbestos Dust Hazard Prevention
- SAFE MACHINE OPERATION
- Starting Engine
- Checks Before Starting Engine
- Safety Rules For Starting Engine
- Starting Engine In Cold Weather
- OPERATION
- Checks After Starting Engine, Before Operation
- Safety Rules For Changing Machine Directions
- Safety Rules For Traveling
- Traveling On Slopes
- Operations On Slopes
- Prohibited Operations
- Operations On Snow
- Parking Machine
- Transportation
- Shipping The Machine
- Battery
- Towing
- Lifting Objects With Bucket
- SAFETY MAINTENANCE INFORMATION
- Warning Tag
- Keep Work Place Clean And Tidy
- Appoint Leader When Working With Others
- Stop Engine Before Carrying Out Maintenance
- Two Workers For Maintenance When Engine Is Running
- Proper Tools
- Accumulator
- Personnel
- Attachments
- Noise
- When Using Hammer
- Welding
- Removing Battery Terminals
- Adjusting Track Tension
- Do Not Disassemble Recoil Springs
- Safety Rules For High-pressure Oil
- Safety Handling High-pressure Hoses
- Waste Materials
- Air Conditioner Maintenance
- Compressed Air
- Periodic Replacement Of Safety Critical Parts.
- OPERATION
- GENERAL VIEW
- General View Of Machine
- General View Controls And Gauges
- EXPLANATION OF COMPONENTS
- Machine Monitor
- Basic Operation Of Machine Monitor
- Basic Check Items
- Caution Items
- Emergency Stop Items
- Meter Display Portion
- Monitor Switches
- Switches
- Control Levers, Pedals
- Ceiling Window
- Front Window
- Emergency Exit From Operator’s Cab
- Door Lock
- Cap, Cover With Lock
- Hot And Cool Box
- Magazine Box With Cup Holder
- Ashtray
- Air Conditioner
- Car Radio
- Fuse
- Fusible Link
- Controller
- Toolbox
- Grease Gun Holder
- Handling The Accumulator
- MACHINE OPERATIONS AND CONTROLS
- Before Starting Engine
- Starting Engine
- After Starting Engine
- In Cold Areas (Automatic Warm-up Operation)
- Stopping The Engine
- Check After Shutting Off Engine
- Machine Operation
- Steering The Machine
- Swinging
- Work Equipment Controls And Operations
- Operating Working Mode
- Prohibited Operations
- General Operation Information
- Traveling On Slopes
- Escape From Mud
- Recommended Applications
- Replacement And Inversion Of Bucket
- Parking Machine
- Check After Shut Off Engine
- Machine Inspection After Daily Work
- Locking
- TRANSPORTATION
- Transportation Procedure
- Loading And Unloading With Trailer
- Lifting Machine
- COLD WEATHER OPERATION
- Fuel And Lubricants
- Cooling System Coolant
- Battery
- Monitor
- After Operations
- After Cold Weather Season
- LONG TERM STORAGE
- Before Storage
- During Storage
- After Storage
- TROUBLESHOOTING
- After Running Out Of Fuel
- Phenomena That Are Not Failures
- Towing The Machine
- Lightweight Towing Hook
- Precautions On Particular Jobsites
- Discharged Battery
- Other Trouble
- MAINTENANCE
- MAINTENANCE INFORMATION
- Service Meter Reading
- Komatsu Genuine Replacement Parts
- Komatsu Genuine Lubricants
- Windshield Washer Fluid
- Fresh And Clean Lubricants
- Check Drained Oil And Used Filter
- Fuel Strainer
- Welding Instructions
- Do Not Drop Things Inside Machine
- Dusty Jobsite
- Avoid Mixing Lubricants
- Locking The Inspection Covers
- Hydraulic System – Air Bleeding
- Hydraulic Hose Installation
- Checks After Inspection And Maintenance Works
- Selecting Fuel And Lubricants To Match Ambient Temperature
- LUBRICANTS, COOLANT AND FILTERS
- Handling Oil, Fuel, Coolant, And Performing Oil Clinic
- Lubrication Chart Decal Explanation
- Electric System Maintenance
- Handling Hydraulic System
- WEAR PARTS LIST
- FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE
- Proper Selection Of Fuel, Coolant And Lubricants
- TIGHTENING TORQUE SPECIFICATIONS
- PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS
- MAINTENANCE SCHEDULE
- Maintenance Schedule Chart
- Maintenance Interval For Hydraulic Breaker
- MAINTENANCE PROCEDURE
- Initial 250 Hours Maintenance
- Initial 1000 Hours Maintenance (Only After The First 1000 Hours)
- When Required
- Check Nitrogen Gas Charge Pressure In Accumulator (Control Circuit)
- Check Before Starting
- 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 5000 Hours Maintenance
- SPECIFICATIONS
- OPTIONS, ATTACHMENTS
- GENERAL PRECAUTIONS
- Precautions Related To Safety
- Precautions When Selecting
- Read The Instruction Manual Thoroughly
- Precautions When Removing Or Installing
- Precautions When Using
- Precautions When Installing Attachments
- HANDLING BUCKET WITH HOOK
- Checking For Damage To Bucket With Hook
- Prohibited Operations
- MACHINES READY FOR ATTACHMENTS
- Explanation Of Components
- Hydraulic Circuit
- Attachment Installation And Removal Procedure
- Operation
- Long-term Storage
- Specifications
- ATTACHMENT GUIDE
- Selection Of Track Shoes
- Selection Of Bucket Teeth
- Standards For Selecting Vertical And Horizontal Pin Type Teeth
- Handling Trapezoidal Bucket
- Handling Extension Arm
- Handling Clamshell Bucket
- RECOMMENDED ATTACHMENT OPERATIONS
- Blank Page
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