Komatsu WA900L-3 Wheel Loader Operation and Maintenance Manual (TEN00009-02)
On a big WA900L-3 loading rock in a quarry or feeding a crusher, you don’t have time for guesswork. This Operation and Maintenance Manual is what I’d keep handy to set up a solid service rhythm, so the loader stays predictable through long shifts. It walks you through how often to inspect key components, what to look for as they age, and how to operate it so you’re not beating up the drivetrain or hydraulics. If, for example, the machine starts cycling slower on a hot day, I’d use this to verify correct operating procedures, check basic maintenance items, and rule out simple causes before calling in heavier diagnostics.
Applications & Use Cases
- Plan preventive maintenance so services are grouped and downtime is easier to schedule.
- Trace early wear in pins, brakes, and steering before it turns into a hard failure.
- Verify operating practices for new operators working in heavy rock or high‑load stockpiles.
- Inspect and adjust items after transport, rebuilds, or long idle periods.
- Confirm basic checks after a fault code or unusual noise, before deeper teardown.
FAQ
Q: Can I use a digital copy on a tablet in the cab or workshop?
A: Yes, it’s practical to keep a searchable copy on a tablet, then zoom in on diagrams while you’re at the machine.
Q: Is it worth printing parts of this manual?
A: Many techs print the routine checklists and lubrication pages to hang in the service bay or keep in a jobsite binder.
Safety Note
Always follow the manual’s safety procedures and lockout instructions before inspecting, adjusting, or servicing the loader.
📘 Show Index
Komatsu WA900L-3 Wheel Loader Index:
- COVER
- FOREWORD
- FOREWORD
- SAFETY INFORMATION
- INTRODUCTION
- FRONT/REAR, LEFT/RIGHT DIRECTIONS OF MACHINE
- VISIBILITY FROM OPERATOR’S SEAT
- NECESSARY INFORMATION
- PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
- ENGINE SERIAL NO. PLATE AND POSITION
- POSITION OF SERVICE METER
- TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR
- CONTENTS
- SAFETY
- SAFETY
- SAFETY LABELS
- LOCATION OF SAFETY LABELS
- GENERAL PRECAUTIONS
- SAFETY RULES
- IF ABNORMALITIES ARE FOUND
- CLOTHING AND PERSONAL PROTECTIVE ITEMS
- FIRE EXTINGUISHER AND FIRST AID KIT
- SAFETY FEATURES
- KEEP MACHINE CLEAN
- INSIDE OPERATOR’S COMPARTMENT
- ALWAYS APPLY LOCK WHEN LEAVING OPERATOR’S SEAT
- HANDRAILS AND STEPS
- MOUNTING AND DISMOUNTING
- NO PEOPLE ON ATTACHMENTS
- DO NOT GET CAUGHT IN ARTICULATED PORTION
- PREVENTION OF BURNS
- FIRE PREVENTION
- ACTION IF FIRE OCCURS
- WINDOW WASHER LIQUID
- PRECAUTIONS WHEN USING ROPS (ROLL OVER PROTECTIVE STRUCTURE)
- PRECAUTIONS FOR ATTACHMENTS, OPTIONS
- UNAUTHORIZED MODIFICATION
- SAFETY AT WORKSITE
- WORKING ON LOOSE GROUND
- DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES
- ENSURE GOOD VISIBILITY
- PRECAUTIONS RELATED TO VENTILATION EXHAUST GAS
- CHECKING SIGNALMAN’S SIGNALS AND SIGNS
- EMERGENCY EXIT FROM OPERATOR’S CAB
- BE CAREFUL ABOUT ASBESTOS DUST
- PRECAUTIONS FOR OPERATION
- STARTING ENGINE
- OPERATION
- TRANSPORTATION
- BATTERY
- TOWING
- PRECAUTIONS FOR MAINTENANCE
- 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
- WORK EQUIPMENT SUPPORT
- ACCUMULATOR
- PERSONNEL
- ATTACHMENTS
- NOISE
- PRECAUTIONS WHEN USING HAMMER
- REPAIR WELDING
- REMOVING BATTERY TERMINAL
- PRECAUTIONS WITH HIGH-PRESSURE OIL
- HANDLING HIGH-PRESSURE HOSES
- WASTE MATERIALS
- MAINTENANCE OF AIR CONDITIONER
- COMPRESSED AIR
- PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS
- PRECAUTIONS WITH TIRES
- HANDLING TIRES
- PRECAUTIONS WHEN STORING TIRES
- OPERATION
- GENERAL VIEW
- GENERAL VIEW OF MACHINE
- GENERAL VIEW OF CONTROLS AND GAUGES
- EXPLANATION OF COMPONENTS
- MACHINE MONITOR
- SWITCHES
- CONTROL LEVERS, PEDALS
- MAIN MONITOR TILT LEVER
- CAP WITH LOCK
- SAFETY BAR
- TOWING PIN
- ENGINE SHUT-DOWN SWITCH
- FUEL STOP LEVER
- GREASE PUMP
- BACKUP ALARM
- CAB DOOR OPEN LOCK
- TOOL BOX
- FUSE
- SLOW BLOW FUSE
- LUNCH BOX TRAY
- POWER OUTLET
- AM/FM RADIO-CASSETTE STEREO
- AIR CONDITIONER
- PRECAUTIONS WHEN HANDLING ACCUMULATOR
- OPERATION
- CHECK BEFORE STARTING ENGINE, ADJUST
- STARTING ENGINE
- OPERATIONS AND CHECKS AFTER STARTING ENGINE
- STOPPING ENGINE
- CHECK AFTER STOPPING ENGINE
- MOVING THE MACHINE (DIRECTIONAL, SPEED), STOPPING THE MACHINE
- TURNING
- OPERATION OF WORK EQUIPMENT
- WORK POSSIBLE USING WHEEL LOADER
- PRECAUTIONS FOR OPERATION
- ADJUSTING WORK EQUIPMENT POSTURE
- REMOVAL AND INSTALLATION OF THE BUCKET
- PARKING MACHINE
- CHECKS AFTER COMPLETION OF OPERATION
- LOCKING
- HANDLING THE TIRES
- OPERATING AUTO-GREASING SYSTEM
- TRANSPORTATION
- TRANSPORTATION PROCEDURE
- LOADING, UNLOADING WORK
- METHOD OF SECURING MACHINE
- METHOD OF LIFTING MACHINE
- COLD WEATHER OPERATION
- PRECAUTIONS FOR LOW TEMPERATURE
- PRECAUTIONS AFTER COMPLETION OF WORK
- AFTER COLD WEATHER
- WARMING-UP OPERATION FOR STEERING HYDRAULIC CIRCUIT IN COLD WEATHER
- LONG-TERM STORAGE
- BEFORE STORAGE
- DURING STORAGE
- AFTER STORAGE
- TROUBLESHOOTING
- WHEN MACHINE RUNS OUT OF FUEL
- METHOD OF TOWING MACHINE
- IF BATTERY IS DISCHARGED
- OTHER TROUBLE
- MAINTENANCE
- GUIDES TO MAINTENANCE
- OUTLINES OF SERVICE
- HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
- OUTLINE OF ELECTRIC SYSTEM
- WEAR PARTS
- USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE
- PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS
- FUEL, OIL AND COOLANT SPECIFICATIONS
- ENGINE OIL SPECIFICATIONS
- TRANSMISSION, CONVERTER, TRANSFER CASE, COOLER, SERVICE BRAKES AND HYDRAULIC SYSTEM OIL SPECIFICATIONS
- DRIVE AXLE OIL SPECIFICATIONS
- DIESEL FUEL SPECIFICATIONS
- COOLANT SPECIFICATIONS
- STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
- PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS
- MAINTENANCE SCHEDULE CHART
- MAINTENANCE SCHEDULE CHART
- SERVICE PROCEDURE
- SPECIFICATIONS
- INDEX
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