Komatsu WA420-3 Wheel Loader Operation and Maintenance Manual

This manual provides essential guidance for operators and maintenance personnel to ensure safe, efficient, and reliable machine performance. This comprehensive manual includes detailed operating instructions, safety guidelines, maintenance schedules for the WA420-3 Wheel Loader model.

COVER
1. FOREWORD
2. SAFETY INFORMATION
3. INTRODUCTION
4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR
5. CONTENTS
SAFETY
- 6. GENERAL PRECAUTIONS
- 7. PRECAUTIONS DURING OPERATION
  - 7.1 BEFORE STARTING ENGINE
  - 7.2 AFTER STARTING ENGINE
  - 7.3 TRANSPORTATION
  - 7.4 BATTERY
  - 7.5 TOWING
- 8. PRECAUTIONS FOR MAINTENANCE
  - 8.1 BEFORE CARRYING OUT MAINTENANCE
  - 8.2 DURING MAINTENANCE
  - 8.3 PRECAUTIONS WITH TIRES
- 9. POSITION FOR ATTACHING SAFETY LABELS
OPERATION
- 10. GENERAL VIEW
  - 10.1 GENERAL VIEW OF MACHINE
  - 10.2 GENERAL VIEW OF CONTROLS AND GAUGES
- 11. EXPLANATION OF COMPONENTS
  - 11.1 MACHINE MONITOR
  - 11.2 SWITCHES
  - 11.3 CONTROL LEVERS, PEDALS
  - 11.4 STEERING COLUMN TILT LEVER
  - 11.5 CAP WITH LOCK
  - 11.6 SAFETY BAR
  - 11.7 TOWING PIN
  - 11.8 GREASE PUMP
  - 11.9 BACKUP ALARM
  - 11.10 FUSE
  - 11.11 SLOW-BLOW FUSE
  - 11.12 STORAGING PLACE OF THIS MANUAL
  - 11.13 TAKING OFF POWER
  - 11.14 TAKING OFF POWER (WITH ROPS CAB)
- 12. OPERATION
  - 12.1 CHECK BEFORE STARTING ENGINE
  - 12.2 STARTING ENGINE
  - 12.3 OPERATIONS AND CHECKS AFTER STARTING ENGINE
  - 12.4 MOVING MACHINE OFF
  - 12.5 CHANGING GEAR SPEED
  - 12.6 CHANGING DIRECTION
  - 12.7 TURNING
  - 12.8 STOPPING MACHINE
  - 12.9 OPERATION OF WORK EQUIPMENT
  - 12.10 WORK POSSIBLE USING WHEEL LOADER
  - 12.11 PRECAUTIONS FOR OPERATION
  - 12.12 ADJUSTING WORK EQUIPMENT POSTURE
  - 12.13 PARKING MACHINE
  - 12.14 CHECKS AFTER COMPLETION OF OPERATION
  - 12.15 STOPPING ENGINE
  - 12.16 CHECK AFTER STOPPING ENGINE
  - 12.17 LOCKING
  - 12.18 HANDLING THE TIRES
- 13. TRANSPORTATION
  - 13.1 LOADING, UNLOADING WORK
  - 13.2 PRECAUTIONS FOR LOADING
  - 13.3 LIFTING MACHINE
  - 13.4 PRECAUTIONS FOR TRANSPORTATION
- 14. COLD WEATHER OPERATION
  - 14.1 PRECAUTIONS FOR LOW TEMPERATURE
  - 14.2 PRECAUTIONS AFTER COMPLETION OF WORK
  - 14.3 AFTER COLD WEATHER
- 15. LONG-TERM STORAGE
  - 15.1 BEFORE STORAGE
  - 15.2 DURING STORAGE
  - 15.3 AFTER STORAGE
- 16. TROUBLESHOOTING
  - 16.1 WHEN MACHINE RUNS OUT OF FUEL
  - 16.2 TOWING THE MACHINE
  - 16.3 IF BATTERY IS DISCHARGED
  - 16.4 OTHER TROUBLE
MAINTENANCE
- 17. GUIDES TO MAINTENANCE
- 18. OUTLINES OF SERVICE
  - 18.1 OUTLINE OF OIL, FUEL, COOLANT
  - 18.2 OUTLINE OF ELECTRIC SYSTEM
- 19. WEAR PARTS LIST
- 20. USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE
- 21. STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
  - 21.1 INTRODUCTION OF NECESSARY TOOLS
  - 21.2 TORQUE LIST
- 22. PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS
- 23. MAINTENANCE SCHEDULE CHART
  - 23.1 MAINTENANCE SCHEDULE CHART
- 24. SERVICE PROCEDURE
  - 24.1 INITIAL 250 HOURS SERVICE
  - 24.2 WHEN REQUIRED
  - 24.3 CHECK BEFORE STARTING
  - 24.4 EVERY 50 HOURS SERVICE
  - 24.5 EVERY 100 HOURS SERVICE
  - 24.6 EVERY 250 HOURS SERVICE
  - 24.7 EVERY 500 HOURS SERVICE
  - 24.8 EVERY 1000 HOURS SERVICE
  - 24.9 EVERY 2000 HOURS SERVICE
  - 24.10 EVERY 4000 HOURS SERVICE
SPECIFICATIONS
- 25. SPECIFICATIONS
OPTIONS, ATTACHMENTS
- 26. OPTIONAL PARTS AND ATTACHMENTS
- 27. SELECTING BUCKETS AND TIRES
- 28. CAR RADIO
  - 28.1 EXPLANATION OF COMPONENTS
  - 28.2 METHOD OF USE
  - 28.3 PRECAUTIONS WHEN USING RADIO
- 29. AIR CONDITIONER
  - 29.1 GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL
  - 29.2 METHOD OF OPERATION
  - 29.3 COOL BOX
- 30. HANDLING E.C.S.S. (ELECTRONIC CONTROLLED SUSPENSION SYSTEM)
  - 30.1 METHOD OF OPERATING E.C.S.S.
  - 30.2 PRECAUTIONS WHEN OPERATING E.C.S.S. SWITCH
- 31. HANDLING AUTO-GREASING SYSTEM
  - 31.1 METHOD OF OPERATING AUTO-GREASING SYSTEM
  - 31.2 PRECAUTIONS WHEN HANDLING AUTO-GREASING SYSTEM
  - 31.3 TROUBLESHOOTING
  - 31.4 SPECIFICATIONS
- 32. OPTION DISPLAY
- 33. HANDLING AUTO-LEVELING, REMOTE POSITIONER
  - 33.1 STRUCTURE AND FUNCTION OF AUTO-LEVELING, REMOTE POSITIONER
  - 33.2 GENERAL LOCATIONS
  - 33.3 METHOD OF OPERATING AUTO-LEVELING, REMOTE POSITIONER
  - 33.4 ADJUSTING AUTO-LEVELING, REMOTE POSITIONER

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