Komatsu TD-25H Operation and Maintenance Manual (OMTD25H00-1E)

Komatsu TD-25H Operation and Maintenance Manual (OMTD25H00-1E)

A TD-25H dozer usually lives on tough jobs: ripping, pushing, and finish grading in quarry, mining, and heavy earthmoving sites. This Operation and Maintenance Manual is what I’d keep in the cab or shop office to set a sane service rhythm, so the machine doesn’t quit in the middle of a push. When a customer complains about sluggish blade response or the machine running hotter than normal, I use this book to walk through the basic checks, daily walk-arounds, and scheduled services that usually catch the issue before it turns into a major teardown.

Applications & Use Cases

• Plan preventive maintenance so filters, oils, and wear points get attention before they cause downtime.
• Set up operator walk-around routines to spot leaks, loose hardware, and track problems early.
• Verify adjustment and inspection steps after repairs, making sure linkages and controls are working smoothly.
• Trace early signs of overheating or power loss using the manual’s recommended check order.
• Align service timing with job schedules to keep the dozer available when production needs it most.

FAQ

Q: Can I keep a digital copy on a tablet in the cab?

A: Yes, that’s ideal for quick searches, but protect the device from dust and vibration.

Q: Is it worth printing certain pages?

A: Print the routine service and inspection pages; they’re handy to mark up and hang in the shop.

Safety Note

Always follow the manual’s shutdown and lockout steps before inspecting or servicing the machine.

Komatsu TD-25H Index:

• MAIN MENU
• COVER
• SECTION CONTENTS
• 1. INTRODUCTION
  • 1.1. INTRODUCTION
  • 1.2. SERIAL NUMBERS
• 2. SAFETY PRECAUTIONS
  • 2.1. GENERAL
  • 2.2. BEFORE STARTING THE ENGINE
  • 2.3. OPERATION
  • 2.4. MAINTENANCE
  • 2.5. SHUTDOWN
  • 2.6. SAFETY PRODUCT GRAPHIC LOCATION
    • 2.6.1. SAFETY PRODUCT GRAPHIC
• 3. MACHINE TRANSPORT AND STORAGE
  • 3.1. MACHINE TRANSPORT
    • 3.1.1. GENERAL
    • 3.1.2. TRUCK
    • 3.1.3. RAILROAD FLAT CAR
  • 3.2. LIFTING A MACHINE ON SLINGS
  • 3.3. MOVING A DISABLED MACHINE
  • 3.4. MACHINE STORAGE
    • 3.4.1. PREPARING FOR STORAGE
    • 3.4.2. SERVICING MACHINE DURING STORAGE
    • 3.4.3. PREPARING FOR OPERATION AFTER STORAGE
• 4. OPERATING
  • 4.1. MACHINE PRECAUTIONS
  • 4.2. UNIVERSAL SYMBOLS FOR INSTRUMENTS AND CONTROLS
  • 4.3. INSTRUMENT PANEL
  • 4.4. CAB CONTROLS
  • 4.5. CONTROLS AND ADJUSTMENT
    • 4.5.1. SEAT
    • 4.5.2. SEAT BELT
    • 4.5.3. ENGINE SPEED AND SHUT DOWN LEVER
    • 4.5.4. TRANSMISSION NEUTRAL LOCK LEVER
    • 4.5.5. TRANSISSION SHIFT LEVER
    • 4.5.6. HAND STEERING LEVERS
    • 4.5.7. BRAKE AND DECELERATOR PEDAL
    • 4.5.8. BRAKE AND DECELERATOR PEDAL LOCK
    • 4.5.9. ELECTRIC SYSTEM MASTER SWITCH
    • 4.5.10. EQUIPMENT CONTROL LEVERS
  • 4.6. STARTING THE ENGINE
    • 4.6.1. NORMAL START
    • 4.6.2. ETHER INJECTION START
    • 4.6.3 ENGINE START AFTER OIL CHANGE OR PROLONGED STANDSTILL
  • 4.7. STOPPING THE ENGINE
  • 4.8. TIPS FOR ENGINE SAFEGUARDING
  • 4.9. DRIVING THE MACHINE
  • 4.10. SHIFTING THE TRANSMISSION
  • 4.11. CONVERTER OVERHEATING
  • 4.12. STEERING THE MACHINE
    • 4.12.1. GRADUAL TURN
    • 4.12.2. PIVOT TURN
  • 4.13. DOWNGRADE OPERATION
  • 4.14. OPERATING OVER AN OBSTRUCTION
  • 4.15. STOPPING THE MACHINE
  • 4.16. PARKING THE MACHINE
  • 4.17. OPERATING THE MOUNTED EQUIPMENT
    • 4.17.1. BLADE CONTROL LEVER
    • 4.17.2. RIPPER CONTROL LEVERS
  • 4.18. BLADE POSITIONS
    • 4.18.1. BULLDOZER BLADE POSITIONS
  • 4.19. OPERATING TECHNIQUES
    • 4.19.1. DIGGING AND CLEARING
    • 4.19.2. TRANSPORTING, PILING OR LOADING
    • 4.19.3. BREAKING PILES AND SPREADING
    • 4.19.4. RIPPING
  • 4.20. ECONOMICAL OPERATION OF THE MACHINE
• 5. MAINTENANCE
  • 5.1. SERVICE PRECAUTIONS
  • 5.2. SCHEDULED MAINTENANCE GUIDE
    • 5.2.1. GROUD LEVEL INSPECTION
  • 5.3. MAINTENANCE AND SERVICE CHART
    • 5.3.1. REFILL SPECIFICATIONS AND CAPACITIES CHART
  • 5.4. LUBRICATION
    • 5.4.1. WHEN SHIPPED
    • 5.4.2. WHEN SERVICED
    • 5.4.3. SELECTION
    • 5.4.4. VISCOSITIES
    • 5.4.5. RECOMMENDED LUBRICANT CHART
  • 5.5. SEASONAL PREPARATION
    • 5.5.1 FUEL SYSTEM
    • 5.5.2. COOLING SYSTEM
    • 5.5.3. ELECTRIC SYSTEM
  • 5.6. AIR CLEANING SYSTEM
    • 5.6.1. AIR PRE-CLEANER
    • 5.6.2. AIR CLEANER
    • 5.6.3. CHECKING AIR INTAKE SYSTEM FOR LEAKS
  • 5.7. BELTS
    • 5.7.1. VISUAL INSPECTION
    • 5.7.2. CHECKING TENSION AND ADJUSTMENT
    • 5.7.3. BELT REPLACEMENT
  • 5.8. COOLING SYSTEM
    • 5.8.1. WATER
    • 5.8.2. ANTIFREEZE
    • 5.8.3. INHIBITORS/CONDITIONERS
    • 5.8.4. RADIATOR CAP
    • 5.8.5. CHECKING COOLANT LEVEL
    • 5.8.6. CHANGING COOLANT
    • 5.8.7. CHANGING THE COOLANT FILTER
  • 5.9. FAN
  • 5.10. ELECTRICAL SYSTEM
    • 5.10.1. ELECTRIC WIRES AND CONNECTIONS
    • 5.10.2. AUTOMATIC RESET CIRCUIT BREAKER
    • 5.10.3. BATTERIES
  • 5.11. ENGINE
    • 5.11.1. CHECKING THE CRANKCASE OIL
    • 5.11.2. CHANGING THE CRANKCASE OIL AND OIL FILTER
    • 5.11.3. ETHER INJECTOR
  • 5.12. FUEL SYSTEM
    • 5.12.1. FILLING THE FUEL TANK
    • 5.12.2. FUEL TANK FILLER STRAINER
    • 5.12.3. FUEL TANK SHUTOFF VALVE
    • 5.12.4. FUEL FITLERS
    • 5.12.5. DRAINING THE FUEL TANK
  • 5.13. HYDRAULIC SYSTEM
    • 5.13.1. CHECKING THE OIL LEVEL
    • 5.13.2. CHANGING HYDRAULIC OIL
    • 5.13.3. REPLACEMENT OF THE RETURN FILTERS AND PILOT FILTER
    • 5.13.4. SERVICING THE SUCTION STRAINER AND FILLER STRAINER
    • 5.13.5. SERVICING THE RESERVOIR BREATHER
    • 5.13.6. VENTING THE HYDRAULIC SYSTEM
  • 5.14. LUBRICATING FITTINGS
  • 5.15. MOUNTED EQUIPMENT
    • 5.15.1. COMPLETE BLADE REMOVAL AND INSTALLATION
    • 5.15.2. DIAGONAL STRUTS ADJUSTMENT
    • 5.15.3. UPPER STRUT AND TILT CYLINDER ADJUSTMENT
    • 5.15.4. PITCH CYLINDER CLEARANCE ADJUSTMENT
    • 5.15.5. CHECKING THE BLADE CONDITION
    • 5.15.6. SERVICING THE RIPPER
  • 5.16. SAFETY BELT
  • 5.17. FINAL DRIVES
    • 5.17.1. CHECKING THE OIL LEVEL
    • 5.17.2. CHANGING THE OIL
  • 5.18. TRANSMISSION SYSTEM
    • 5.18.1 CHECKING THE OIL LEVEL IN REAR MAIN FRAME
    • 5.18.2. CHANGING TRANSMISSION SYSTEM OIL
    • 5.18.3 SERVICING THE TRANSMISSION SYSTEM PRESSURE FILTERS
    • 5.18.4. SERVICING THE SUCTION STRAINER
    • 5.18.5. SERVICING THE TRANSMISSION SCAVENGER STRAINER
    • 5.18.6. SERVICING THE BREATHER
  • 5.19. UNDERCARRIAGE
    • 5.19.1. TRACK SHOE BOLTS
    • 5.19.2. EFFECT OF TRACK ADJUSTMENT ON UNDERCARRIAGE WEAR
    • 5.19.3. CHECKING THE TENSION
    • 5.19.4. ADJUSTING TENSION
    • 5.19.5. TRACK FRAME GUIDE
    • 5.19.6. PIVOT SHAFT HOUSING
    • 5.19.7. FRONT WHEEL GUIDES
  • 5.20. ADJUSTING HAND AND FOOT CONTROLS
  • 5.21. CAB AND ROPS
    • 5.21.1. ROPS CAB/CANOPY AND MOUNTED EQUIPMENT MOUNTING HARDWARE
    • 5.21.2. AIR CONDITIONER FILTER CLEANING
    • 5.21.3. WINDSHIELD WASHER RESERVOIR
• 6. SPECIFICATIONS
  • 6.1. APPLICATION
  • 6.2. TECHNICAL DESCRIPTION
  • 6.3. SPECIFICATIONS
    • 6.3.1. OVERALL DIMENSIONS OF DOZERS
    • 6.3.2. ENGINE
    • 6.3.3. ELECTRICAL SYSTEM
    • 6.3.4. TORQUE CONVERTER
    • 6.3.5. TRAVEL SPEEDS
    • 6.3.6. TRANSMISSION
    • 6.3.7. STEERING DRIVE
    • 6.3.8. FINAL DRIVES OPERATION WEIGHTS
    • 6.3.9. TRACK FRAMES
    • 6.3.10. TRACK CHAINS
    • 6.3.11. FUEL CONSUMPTION
    • 6.3.12. WEIGHT (APPROXIMATE)
    • 6.3.13. BLADE
    • 6.3.14. RIPPER
  • 6.4. REFILL CAPACITIES
  • 6.5. SPECIAL TORQUES
  • 6.6. TORQUE VALUES FOR STANDARD METRIC FASTENERS
  • 6.7. TORQUE VALUES FOR STANDARD ENGLISH FASTENERS
  • 6.8. TORQUE VALUES FOR SPLIT FLANGE CONNECTIONS
  • 6.9. TORQUE VALUES FOR HYDRAULIC TUBES AND FITTINGS
  • 6.10. TORQUE VALUES FOR HOSE CLAMPS
  • 6.11. TORQUE VALUES FOR AIR CONDITIONING TUBES AND FITTINGS
  • 6.12. TORQUE VALUES FOR AIR CONDITIONING O-RING CONNECTIONS
  • 6.13. LIST OF SERVICE TOOLS
  • 6.14. DRIVE TRAIN SCHEMATIC
  • 6.15. DRIVE TRAIN HYDRAULIC SYSTEM DIAGRAM
  • 6.16. EQUIPMENT HYDRAULIC SYSTEM DIAGRAM
  • 6.17. WIRING DIAGRAM
  • 6.18. CAB WIRING DIAGRAM

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