Komatsu D155AX-8 Bulldozer Operation and Maintenance Manual (TEN00936-00)

On a D155AX-8 that’s pushing heavy cuts all day in rock or tough clay, this Operation and Maintenance Manual is what I keep handy to keep the dozer reliable and predictable. It walks you through how to run the machine correctly and when to stop and inspect things, so you’re not waiting for a breakdown to tell you something’s wrong. For example, if the machine starts running hotter during long pushes, I’d use this book to verify the proper checks on cooling components and adjust operating habits before it turns into real downtime.

Applications & Use Cases

Plan preventive maintenance so undercarriage, blade gear, and hydraulics get serviced before they start eating money.
Set a realistic service rhythm around your actual workload and site conditions.
Trace early wear signs—unusual noises, vibrations, or sluggish response—and narrow down what to inspect first.
Train new operators on proper warm-up, shutdown, and work techniques that reduce stress on the machine.
Verify inspection points before and after a shift to catch leaks, loose hardware, or damage early.

FAQ

Q: Can I keep this manual on a tablet in the cab?

A: Yes, just make sure it’s downloaded offline so you can zoom in and search quickly without needing a signal.

Q: Is it worth printing parts of this manual?

A: I’d print the daily/weekly checks and keep them in a plastic sleeve in the service truck for quick reference.

Safety Note

Always follow the manual’s safety procedures before inspecting, adjusting, or working around the machine.

📘 Show Index

Komatsu D155AX-8 Bulldozer Index:

COVER
FOREWORD
- CONTENTS
- READ THIS MANUAL
- SAFETY INFORMATION
- INTRODUCTION
  - MAIN USE OF MACHINE
  - DIRECTIONS OF MACHINE
  - VISIBILITY FROM OPERATOR’S SEAT
- ENGINE TECHNOLOGY TO CONFORM EXHAUST GAS EMISSION
- PRODUCT INFORMATION
  - LOCATION OF PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
  - LOCATION OF ENGINE NUMBER PLATE
  - LOCATION OF BLADE SERIAL NO. PLATE
  - LOCATION OF RIPPER SERIAL NO. PLATE
  - LOCATION FOR ROPS AND FOPS PLATE
  - SERVICE METER LOCATION
  - YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR
- ABBREVIATION LIST
SAFETY
- SAFETY
- SAFETY LABELS
  - LOCATION OF SAFETY LABELS
  - CONTENTS OF SAFETY LABELS
- GENERAL PRECAUTIONS COMMON TO OPERATION AND MAINTENANCE
  - PRECAUTIONS BEFORE STARTING OPERATION
  - PREPARATIONS FOR SAFE OPERATION
  - PRECAUTIONS TO PREVENT FIRE
  - PRECAUTIONS WHEN GETTING ON OR OFF MACHINE
  - DO NOT GET CAUGHT IN WORK EQUIPMENT
  - PRECAUTIONS RELATED TO PROTECTIVE STRUCTURES
  - UNAUTHORIZED MODIFICATION
  - PRECAUTIONS RELATED TO ATTACHMENTS AND OPTIONS
  - PRECAUTIONS WHEN RUNNING ENGINE INSIDE BUILDING
- PRECAUTIONS FOR OPERATION
  - PRECAUTIONS FOR JOBSITE
  - START ENGINE
  - PRECAUTIONS FOR OPERATION
  - PRECAUTIONS FOR TRANSPORTATION
  - TOWING AND BEING TOWED
- PRECAUTIONS FOR MAINTENANCE
  - PRECAUTIONS BEFORE STARTING INSPECTION AND MAINTENANCE
  - PRECAUTIONS FOR CHECK AND MAINTENANCE
- PRECAUTIONS FOR DEF
  - GENERAL CHARACTER AND PRECAUTIONS FOR HANDLING
  - PRECAUTIONS FOR ADDING
  - PRECAUTIONS FOR STORING
  - PRECAUTIONS FOR FIRE HAZARD AND LEAKAGE
  - OTHER PRECAUTIONS
OPERATION
- GENERAL VIEW
  - MACHINE EQUIPMENT NAME
  - CONTROLS AND GAUGES NAMES
- EXPLANATION OF COMPONENTS
  - EXPLANATION OF MACHINE MONITOR EQUIPMENT
  - SWITCHES
  - CONTROL LEVERS AND PEDALS
  - OTHER EQUIPMENT
- MACHINE OPERATIONS AND CONTROLS
  - CHECKS AND ADJUSTMENT BEFORE STARTING ENGINE
  - METHOD FOR STARTING ENGINE
  - METHOD FOR OPERATIONS AND CHECKS AFTER STARTING ENGINE
  - METHOD FOR STOPPING ENGINE
  - METHOD FOR STARTING MACHINE (TRAVEL FORWARD AND REVERSE) AND STOPPING MACHINE
  - SHIFT GEARS
  - METHOD FOR SWITCHING BETWEEN FORWARD AND REVERSE
  - METHOD FOR STEERING MACHINE
  - PRECAUTIONS FOR OPERATION
  - PRECAUTIONS WHEN OPERATING ON SLOPE
  - PRECAUTIONS FOR USING BRAKE
  - DO NOT OPEN DOOR WHILE OPERATING MACHINE
  - DO NOT MODIFY CAB GLASS IN ANY WAY THAT WILL OBSTRUCT THE VIEW
  - PRECAUTIONS FOR FLOATING OPERATION
  - PRECAUTIONS FOR BLIND SPOTS CAUSED BY CAB AND ROPS STRUCTURES
  - RECOMMENDED APPLICATIONS
  - EFFECTIVE USE OF RIPPER
  - OPERATING METHOD FOR RIPPING WORK
  - METHOD FOR ADJUSTING WORK EQUIPMENT
  - TIPS FOR LONGER UNDERCARRIAGE LIFE
  - METHOD FOR PARKING MACHINE
  - METHOD FOR CHECKING AFTER FINISHING WORK
  - LOCK
- HANDLE AIR CONDITIONER
  - EXPLANATION OF AIR CONDITIONER EQUIPMENT
  - METHOD FOR OPERATING AIR CONDITIONER
- HANDLE RADIO
  - EXPLANATION OF RADIO EQUIPMENT
  - METHOD FOR CONTROLLING RADIO
  - ANTENNA
- TRANSPORTATION
  - PRECAUTIONS FOR TRANSPORTATION
  - TRAVEL ON ROAD
  - PRECAUTIONS FOR TRANSPORTING MACHINE
  - TRANSPORTATION PROCEDURE
  - LOADING AND UNLOADING WITH TRAILER
  - METHOD FOR LIFTING MACHINE
- COLD WEATHER OPERATION
  - COLD WEATHER OPERATION INFORMATION
  - PRECAUTIONS AFTER DAILY WORK COMPLETION IN COLD WEATHER
  - AFTER COLD WEATHER SEASON
- PRECAUTIONS FOR LONG-TERM STORAGE
  - PREPARATION FOR LONG-TERM STORAGE
  - MAINTENANCE DURING LONG-TERM STORAGE
  - STARTING MACHINE AFTER LONG-TERM STORAGE
- TROUBLES AND ACTIONS
  - ACTIONS WHEN RUNNING OUT OF FUEL
  - PRECAUTIONS FOR TOWING MACHINE
  - PRECAUTIONS FOR DISCHARGED BATTERY
  - OTHER TROUBLE
MAINTENANCE
- PRECAUTIONS FOR MAINTENANCE
  - CHECK SERVICE METER READING
  - KOMATSU GENUINE REPLACEMENT PARTS
  - KOMATSU GENUINE LUBRICANTS
  - ALWAYS USE CLEAN WASHER FLUID
  - FRESH AND CLEAN LUBRICANTS
  - CHECK DRAINED OIL AND USED FILTER
  - PRECAUTIONS FOR REFILLING OIL OR FUEL
  - PRECAUTIONS FOR ADDING DEF
  - PRECAUTIONS FOR WELDING
  - DO NOT DROP THINGS INSIDE MACHINE
  - PRECAUTIONS FOR KDPF
  - PRECAUTIONS FOR SCR ASSEMBLY
  - DUSTY JOBSITES
  - AVOID MIXING OIL
  - LOCK INSPECTION COVERS
  - PRECAUTIONS FOR OPENING AND CLOSING ENGINE SIDE COVER
  - BLEED AIR FROM HYDRAULIC CIRCUIT
  - PRECAUTIONS WHEN INSTALLING HYDRAULIC HOSES
  - CHECKS AFTER INSPECTION AND MAINTENANCE
  - FUEL AND LUBRICANTS TO MATCH THE AMBIENT TEMPERATURE
- OUTLINE OF MAINTENANCE
  - HANDLE OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
  - HANDLE ELECTRICAL COMPONENTS
  - HANDLE HYDRAULIC COMPONENTS
- STANDARD TIGHTENING TORQUE FOR BOLTS AND NUTS
- MAINTENANCE SCHEDULE
  - MAINTENANCE SCHEDULE TABLE
- MAINTENANCE PROCEDURE
  - INITIAL 250 HOURS MAINTENANCE (ONLY AFTER THE FIRST 250 HOURS)
  - WHEN REQUIRED
  - CHECKS BEFORE STARTING
  - EVERY 250 HOURS MAINTENANCE
  - EVERY 500 HOURS MAINTENANCE
  - EVERY 1000 HOURS MAINTENANCE
  - EVERY 2000 HOURS MAINTENANCE
  - EVERY 4000 HOURS MAINTENANCE
  - EVERY 4500 HOURS MAINTENANCE
  - EVERY 8000 HOURS MAINTENANCE
  - EVERY 9000 HOURS MAINTENANCE
SPECIFICATIONS
- SPECIFICATIONS
  - SPECIFICATIONS : D155AX-8
ATTACHMENTS AND OPTIONS
- GENERAL PRECAUTIONS
  - PRECAUTIONS FOR SAFETY
- ATTACHMENTS AND OPTIONS
- SELECTION PROCEDURE OF RIPPER POINT
- HANDLE HEADREST
- HANDLE EXTERNAL POWER SUPPLY ENGINE PREHEATER
  - INSTALLATION PROCEDURES FOR EXTERNAL POWER SUPPLY SYSTEM FOR EXTERNAL POWER SUPPLY ENGINE PREHEATER
  - FABRICATE EXTERNAL POWER SUPPLY CABLE
  - INSTALL EXTERNAL POWER SUPPLY SYSTEM
  - CHECK OPERATION AFTER COMPLETION OF ASSEMBLING
  - METHOD FOR STARTING ENGINE IN COLD WEATHER
REPLACEMENT PARTS
- PERIODIC REPLACEMENT OF DEFINED LIFE PARTS
  - DEFINED LIFE PARTS LIST
- CONSUMABLE PARTS
  - CONSUMABLE PARTS
- RECOMMENDED FUEL, COOLANT, AND LUBRICANT
  - LUBRICATION CHART
  - METHOD FOR USING FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE
  - RECOMMENDED BRANDS AND QUALITIES OTHER THAN KOMATSU GENUINE OILS
INDEX