Komatsu WA120L-3MC Wheel Loader Operation and Maintenance Manual (SEAM038301T)

Komatsu WA120L-3MC Wheel Loader Operation and Maintenance Manual (SEAM038301T)

Format: PDF (Printable Document)

File Language: English

File Pages: 225

File Size: 8.97 MB (Speed Download Link)

Brand: Komatsu

Model: WA120L-3MC Wheel Loader

Book No: SEAM038301T

Type of Document: Operation and Maintenance Manual

Categories: Komatsu PDF, PDF

$ 40

Komatsu WA120L-3MC Wheel Loader Operation and Maintenance Manual (SEAM038301T)

This manual is what I’d keep on hand for a WA120L-3MC that spends its days loading trucks, feeding hoppers, or handling material in a quarry or yard. It walks you through how to run the machine correctly and keep a steady maintenance rhythm so it doesn’t quit in the middle of a shift. If, for example, the loader starts feeling sluggish during repeated bucket cycles, this book helps you trace whether you’re dealing with an operator setting issue, basic maintenance overdue, or something that needs a mechanic.

Applications & Use Cases

Plan preventive maintenance so you can schedule greasing, filter changes, and checks around your production, not the other way around.
Set up daily and weekly inspections to catch loose pins, leaks, or tire damage before they become breakdowns.
Coach new operators on proper warm-up, shutdown, and work techniques that reduce stress on the driveline and hydraulics.
Verify adjustments and settings after repairs or part replacements to keep the loader stable and predictable under load.
Build a service log that matches the manual’s recommendations, helping you track wear patterns over the long term.

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 printed copy in the shop as backup.

Q: Is it worth printing the whole manual?

A: I’d print the routine checks, lubrication, and basic troubleshooting pages and keep the rest digital for reference.

Safety Note

Always follow the manual’s safety instructions and lockout procedures before inspecting, adjusting, or servicing the loader.

📘 Show Index

Komatsu WA120L-3MC Wheel Loader Index:

MAIN MENU
COVER
FOREWORD
- 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 Tires
- 9. POSITION FOR ATTACHING SAFETY LABLES
OPERATION
- 10. GENERAL VIEW
  - 10.1 General View of Machine
  - 10.2 General View of Controls and Gauges
- 11. EXPLANATION OF COMPONENTS
  - 11.1 Meter, Lamps
  - 11.2 Switches
  - 11.3 Control Levers, Pedals
  - 11.4 Cap with Lock
  - 11.5 Safety Bar
  - 11.6 Towing Pin
  - 11.7 Grease Pump Clamp and Rubber Ring
  - 11.8 Backup Alarm
  - 11.9 Fuse
  - 11.10 Slow-blow Fuse
  - 11.11 Manual Pocket
  - 11.12 Power Supply Socket
- 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
OPERATIONS, 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. CAR STEREO
  - 29.1 Explanation of Components
  - 29.2 When Receiving Radio Broadcasts
  - 29.3 When Playing A Cassette Tape
  - 29.4 Specifications
- 30. AIR CONDITIONER
  - 30.1 General Locations and Function of Control Panel
  - 30.2 Method of Operation
  - 30.3 Cool Box
- 31. HANDLING E.C.S.S. (Electronic Controlled Supsension System)
  - 31.1 Structure and Function of E.C.S.S.
  - 31.2 Method of Operating E.C.S.S.
  - 31.3 Precautions When Operating E.C.S.S. Switch
  - 31.4 Precautions When Handling Accumulator