Komatsu HM300-2 Dump Truck Operation and Maintenance Manual (EEAM027303)
On an HM300-2 running quarry haul or site muck shifting all day, this Operation and Maintenance Manual is what I use to keep the truck predictable and available. It walks you through how to run the machine without abusing it, and how to stay on top of routine checks before they turn into downtime. If a driver reports the truck feels “soft” on a climb or braking seems inconsistent, I’ll go back to this book to verify operating procedures, daily inspection points, and the basic service rhythm before I start tearing into components.
Applications & Use Cases
- Set a realistic service schedule so you can plan greasing, filter changes, and inspections around production instead of reacting to failures.
- Standardize operator habits—how to warm up, shut down, and park the truck to reduce stress on drivetrain and hydraulics.
- Trace early wear signs like uneven tire wear or sluggish hoist by following the recommended walk‑around and in-cab checks.
- Verify fluid and inspection points when training new techs so they don’t miss hidden drains, sight glasses, or test ports.
- Reduce cold-start and heavy-load issues by following the manual’s guidance on operating in extreme temperatures and rough underfoot conditions.
FAQ
Q: Can I keep this manual on a tablet in the service truck?
A: Yes, it’s convenient to use digitally; just make sure the file is searchable so you can jump to procedures quickly onsite.
Q: Is it worth printing parts of this manual?
A: I’d print the daily checks and key maintenance pages, laminate them, and keep them in the cab and shop for quick reference.
Safety Note
Always follow the manual’s safety instructions before inspecting, lifting, or working under any part of the dump body or chassis.
Komatsu HM300-2 Dump Truck Index:
- FOREWORD
- BEFORE READING THIS MANUAL
- SAFETY INFORMATION
- Noise emission levels
- Vibration levels
- INTENDED USE
- USE OF MACHINE
- DIRECTIONS OF MACHINE
- VISIBILITY FROM OPERATOR’S SEAT
- LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR
- PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
- EPA REGULATIONS, ENGINE NUMBER PLATE
- SERVICE METER POSITION
- TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR
- MACHINE SERIAL NUMBER PLATE
- MACHINE SERIAL NUMBER PLATE (according directive 2006/42/EC)
- Declaration of conformity (Directive 2006/42/EC)
- FOREWORD
- SAFETY
- OPERATION
- MAINTENANCE
- SPECIFICATIONS
- ATTACHMENTS, OPTIONS
- INDEX
- COLOPHON
- SAFETY
- SAFETY
- SAFETY LABELS
- POSITION FOR ATTACHING SAFETY LABELS
- SAFETY LABELS
- GENERAL PRECAUTIONS COMMON TO OPERATION AND MAINTENANCE
- PRECAUTIONS BEFORE STARTING OPERATION
- PREPARATIONS FOR SAFE OPERATION
- FIRE PREVENTION
- PRECAUTIONS WHEN GETTING ON OR OFF MACHINE
- DO NOT GET CAUGHT IN ARTICULATING PORTION AND DUMP BODY
- 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
- STARTING ENGINE
- OPERATION
- TRANSPORTATION
- TOWING
- PRECAUTIONS FOR MAINTENANCE
- PRECAUTIONS BEFORE STARTING INSPECTION AND MAINTENANCE
- PRECAUTIONS FOR INSPECTION AND MAINTENANCE
- TIRES
- DISMANTLING THE MACHINE END OF SERVICE LIVE
- OPERATION
- GENERAL VIEW
- GENERAL VIEW OF MACHINE
- GENERAL VIEW OF CONTROLS AND GAUGES
- EXPLANATION OF COMPONENTS
- MACHINE MONITOR
- OTHER FUNCTIONS OF MACHINE MONITOR
- SWITCHES
- CONTROL LEVERS AND PEDALS
- BODY PIVOT PIN
- ARTICULATE LOCK
- LOCATION OF FIRE EXTINGUISHER
- DUST INDICATOR
- CIRCUIT BREAKER
- BATTERY DISCONNECT SWITCH (if installed)
- FUSES
- CAR RADIO
- CAR STEREO
- AIR CONDITIONER
- OPERATION
- CHECK BEFORE STARTING ENGINE
- STARTING ENGINE
- OPERATIONS, CHECKS AFTER STARTING ENGINE
- STOPPING ENGINE
- CHECKS AFTER STOPPING ENGINE
- MOVING MACHINE OFF (FORWARD, REVERSE), STOPPING
- SHIFTING GEAR
- TRAVELLING DOWNHILL
- STEERING THE MACHINE
- OPERATION USING DIFFERENTIAL LOCK
- LOADING OPERATIONS
- DUMP OPERATIONS
- CAB TILT OPERATION
- PRECAUTIONS FOR OPERATION
- PARKING MACHINE
- CHECKS AFTER COMPLETION OF WORK
- LOCKING
- HANDLING TIRES
- DETERMINING AND MAINTAINING TRAVEL ROAD
- DETERMINING TRAVEL ROAD
- MAINTAINING TRAVEL ROAD
- TRANSPORTATION
- PRECAUTIONS WHEN TRANSPORTING
- STEPS FOR TRANSPORTATION
- METHOD OF SECURING MACHINE
- METHOD OF LIFTING MACHINE
- COLD WEATHER OPERATION
- PRECAUTIONS FOR LOW TEMPERATURE
- PRECAUTIONS AFTER COMPLETION OF WORK
- AFTER COLD WEATHER
- LONG-TERM STORAGE
- BEFORE STORAGE
- DURING STORAGE
- AFTER STORAGE
- PRECAUTIONS BEFORE TRAVELLING AFTER LONG-TERM STORAGE
- TROUBLESHOOTING
- AFTER RUNNING OUT OF FUEL
- IF TRANSMISSION HAS TROUBLE
- METHOD OF LOWERING DUMP BODY IN EMERGENCY
- METHOD OF TOWING MACHINE
- IF BATTERY IS DISCHARGED
- OTHER TROUBLE
- MAINTENANCE
- GUIDES TO MAINTENANCE
- OUTLINE OF SERVICE
- HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC
- OUTLINE OF ELECTRIC SYSTEM
- WEAR PARTS
- RECOMMENDED FUEL, COOLANT, AND LUBRICANT
- USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE
- RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN KOMATSU GENUINE OIL
- STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
- PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS
- MAINTENANCE SCHEDULE CHART
- MAINTENANCE SCHEDULE CHART
- SERVICE PROCEDURE
- INITIAL 250 HOURS SERVICE (ONLY AFTER THE FIRST 250 HOURS)
- WHEN REQUIRED
- CHECK BEFORE STARTING
- EVERY 50 HOURS SERVICE
- EVERY 250 HOURS SERVICE
- EVERY 500 HOURS SERVICE
- EVERY 1000 HOURS SERVICE
- EVERY 2000 HOURS SERVICE
- EVERY 4000 HOURS SERVICE
- EVERY 6000 HOURS SERVICE
- EVERY 8000 HOURS SERVICE
- SPECIFICATIONS
- ATTACHMENTS, OPTIONS
- GENERAL PRECAUTIONS
- AUTHORIZED OPTIONAL EQUIPMENT
- PRECAUTIONS RELATED TO SAFETY
- PRECAUTIONS REGARDING THE INSTALLATION OF EQUIPMENT
- HANDLING AUTOMATIC RETARDER, ACCELERATOR CONTROL (ARAC)
- EXPLANATION OF COMPONENTS
- METHOD OF OPERATION
- USE OF REAR VIEW MONITOR
- NAME AND FUNCTION OF EACH PART OF REAR VIEW MONITOR
- SETTING OF REAR VIEW MONITOR
- CAUTIONS WHEN USING REAR VIEW MONITOR
- HANDLING DUMPING COUNTER
- METHOD OF DISPLAYING, RESETTING DUMPING COUNTER
- HANDLING MACHINES EQUIPPED WITH KOMTRAX
- INDEX
- <A>
- <B>
- <C>
- <D>
- <E>
- <F>
- <G>
- <H>
- <I>
- <L>
- <M>
- <O>
- <P>
- <R>
- <S>
- <T>
- <U>
- <W>
- COLOPHON
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