Komatsu WA380-6 Wheel Loader Operation and Maintenance Manual (CEAM023203)
The WA380-6 is a mid-size wheel loader that lives in quarries, batch plants, and busy yards, loading trucks and feeding hoppers all day. This Operation and Maintenance Manual helps you run it the same way every shift and service it on a steady rhythm so it doesn’t quit in the middle of a pile. When you start seeing slower hydraulic response or uneven bucket rollback, this is what you use to trace whether it’s an operating issue, a basic adjustment, or time for scheduled service before it turns into downtime.
Applications & Use Cases
- Set up a preventive maintenance schedule so filters, joints, and pins get attention before they show obvious play or leaks.
- Walk around the machine with a checklist mindset, knowing where to inspect for hairline cracks, loose hardware, or early hose chafe.
- Verify correct warm-up and shut-down routines to avoid thermal shock and extend engine and hydraulic component life.
- Plan parts and shop time ahead of major services so the loader is down once, not three times for forgotten items.
- Train new operators to run the loader without abusive habits that accelerate wear on brakes, driveline, and attachment linkage.
FAQ
Q: Can I keep this manual on a tablet in the cab?
A: Yes, it’s practical to use digitally; you can zoom diagrams and search terms, but keep a hard copy in the shop as backup.
Q: Is it worth printing the whole manual?
A: Many techs print only the daily checks and periodic service pages, laminate them, and keep them where the machine is fueled or parked.
Safety Note
Always follow the manual’s safety procedures and lockout steps before inspecting, adjusting, or servicing the loader.
📘 Show Index
Komatsu WA380-6 Wheel Loader Index:
- INTRODUCTION
- FOREWORD
- SAFETY INFORMATION
- APPROVED AND NON-APPROVED USES
- Approved Functions
- Non-Approved Functions
- VISIBILITY STANDARD
- Visibility in Immediate Area
- 12-M Radius Visibility
- PRODUCT IDENTIFICATION
- Directions of Machine
- Machine Serial Number
- Engine Serial Number, EPA Regulations
- Service Meter Location
- SERIAL NUMBERS AND DEALER INFORMATION
- TABLE OF CONTENTS
- SAFETY
- SAFETY AND WARNING DECALS
- Location of the Safety Decals
- Safety Labels
- GENERAL SAFETY RULES AND PRECAUTIONS
- General Safety Rules
- Safety Features
- Personal Protective Equipment
- Fire and Explosion Prevention
- Action if Fire Occurs
- Fire Extinguisher and First Aid Kit
- Mounting and Dismounting
- Inside Operator’s Compartment
- Precautions When Standing Up from Operator’s Seat
- Precautions When Using ROPS
- Emergency Escape from Operator’s Cab
- Leaving Operator’s Compartment
- Precautions When Cleaning Cab Glass
- Asbestos Hazard Alert
- Crush or Pinch-Point Dangers
- Precautions for Ventilation Exhaust Gas
- PRECAUTIONS BEFORE STARTING OPERATIONS
- Pre-Operational Checks
- Seat Belt Inspection
- Work Site Hazards
- Avoiding Dangerous Situations
- Working Clearances
- Working Near High-Voltage Cables
- RULES FOR TRAVEL
- Traveling in Reverse
- Working on Loose or Unstable Ground
- Operating on Snow or Frozen Surfaces
- Travel on Slopes
- Using the Brakes
- Parking the Machine
- PRECAUTIONS DURING MAINTENANCE OPERATIONS
- Warning Tags
- Equipment Storage
- Keeping the Machine Clean
- Using Drop Lamps
- Working Under the Machine
- Stopping Machine During Maintenance
- Precautions When Using Hammer
- Noise
- Precautions When Using Compressed Air
- Running the Machine During Maintenance
- Rules for Refueling the Machine
- Cooling System Precautions
- Welding Precautions
- Battery Precautions
- Starting the Machine
- High-Pressure Hoses
- Precautions for High-Pressure Liquids
- Precautions for High-Temperature Liquids
- Critical Parts
- Handling Accumulator and Gas Spring
- Disposal of Waste Materials
- Inflating Tires
- High Voltage
- Maintenance of Air Conditioner
- OPERATION
- GENERAL VIEW
- General View of Machine
- Controls and Gauges
- EXPLANATION OF COMPONENTS
- Machine Monitor
- Types of Warnings
- Character Display Portion
- Emergency Stop Items
- Caution Items
- Inspection and Maintenance Items
- Pilot Display Portion
- Meter Display Portion
- OTHER FUNCTIONS OF MACHINE MONITOR
- Overall Menu
- Switches
- Control Levers, Pedals
- SECURITY LOCKS AND SAFETY FEATURES
- Steering Column Tilt Lever
- Cap with Lock
- Backup Alarm
- Frame Lock Bar
- Towing Pin
- MACHINE FEATURES
- Cab Door
- Cab Wiper
- Grease Pump
- ELECTRICAL
- WORK OPERATIONS
- Walk-Around Check
- Precautions Before Starting Work Operations
- Check Before Starting Engine
- Final Checks Before Starting Engine
- Starting Engine
- Operations and Checks After Starting Engine
- Stopping Engine
- Moving the Machine (Directional, Speed), Stopping the Machine
- Operation of Work Equipment
- Work Possible Using Wheel Loader
- Loading Operations
- Precautions
- Adjusting Work Equipment
- Measuring Dump Angle
- Parking the Machine
- Checks After Completion of Operation
- Locking the Machine
- HANDLING TIRES
- Precautions When Handling Tires
- TRANSPORTATION
- Transportation Procedure
- Loading and Unloading Trailers
- LIFTING MACHINE
- Lifting Position Marks
- Lifting Procedure
- COLD WEATHER OPERATION
- Precautions for Low Temperature
- LONG-TERM STORAGE
- Before Storage
- During Storage
- After Storage
- TROUBLESHOOTING
- When Machine Runs Out of Fuel
- Towing the Machine
- If Battery is Discharged
- Starting Engine With Booster Cable
- Other Troubleshooting
- MAINTENANCE
- GUIDES TO MAINTENANCE
- Check Service Meter
- Komatsu Genuine Replacement Parts
- Komatsu Genuine Oils
- Always Use Clean Washer Fluid
- Always Use Clean Oil and Grease
- Checking for Foreign Materials in Drained Oil and On Filters
- Fuel Strainer
- Welding Instructions
- Do Not Drop Things Inside Machine
- Dusty Work Sites
- Avoid Mixing Oil
- Locking Inspection Covers
- Bleeding Air from Hydraulic Circuit
- Precautions When Installing Hydraulic Hoses
- Checks After Inspection and Maintenance
- OUTLINES OF SERVICE
- Handling Oil, Fuel, Coolant, and Performing Oil Clinic
- Performing KOWA (Komatsu Oil Wear Analysis)
- Storing Oil and Fuel
- Filters
- Outline of Electric System
- WEAR PARTS
- RECOMMENDED FUEL, COOLANT, AND LUBRICANTS
- Fuel, Coolant, and Lubricant Ambient Temperature Chart
- Recommended Brands, Other Than Komatsu Genuine Oil
- Biodiesel Usage
- STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
- PERIODIC REPLACEMENT OF SAFETY-CRITICAL PARTS
- MAINTENANCE SCHEDULE CHART
- SERVICE PROCEDURE
- Initial 250 Hours Service
- Initial 1000 Hours Service
- When Required
- Check Before Starting
- Every 50 Hours Service
- Every 100 Hours Service
- Every 250 Hours Service
- Every 500 Hours Service
- Every 1000 Hours Service
- Every 2000 Hours Service
- Every 4000 Hours Service
- Every 8000 Hours Service
- SPECIFICATIONS
- OPTIONS, ATTACHMENTS
- SELECTING BUCKET AND TIRES
- TORQUE CONVERTER LOCKUP
- Components
- Method of Operation
- Travel Speed Functions
- JOYSTICK STEERING SYSTEM
- Structure and Function
- Components
- Steering with Joystick Lever or Steering Wheel
- Precautions for Steering with Joystick
- Operating the Joystick Steering System
- Getting In and Out of Operator’s Cab
- Adjustments
- AM/FM RADIO CASSETTE STEREO SOUND SYSTEM
- Sound System Components
- Method of Operation
- Precautions When Using
- Handling Cassette Tape
- MP3 AM/FM RADIO CD UNIT
- AUTOMATIC AIR CONDITIONER
- Control Panel
- Method of Operation
- Precautions When Using Air Conditioner
- Inspection and Maintenance
- Cool Box
- MULTI-FUNCTION MONO-LEVER
- Components
- Using FNR Switch to Change Between Forward and Reverse
- MACHINES EQUIPPED WITH KOMTRAX
Link Belt
