Komatsu HM300-2R Articulated Dump Truck Shop Manual SEN02269-04 – PDF Download

Description

This Komatsu HM300-2R Articulated Dump Truck Shop Manual (Form No. SEN02269-04) is the complete service documentation package for machines with serial numbers 7001 and up. Covering everything from the SAA6D125E-5 engine through the transmission, brakes, hydraulics, electrical systems and frame, this manual gives technicians, workshop crews and fleet maintenance teams the procedures, specifications and diagnostic logic needed to service the HM300-2R correctly.

File Details

• Manual Type: Shop Manual
• Brand: Komatsu
• Model: HM300-2R Articulated Dump Truck
• Serial Numbers: 7001 and up
• Engine: Komatsu SAA6D125E-5
• Language: English
• Page Count: Approximately 1,330 pages
• File Format: PDF
• Document Number: SEN02269-04

Chapters Covered

• 00 Index and foreword
• 01 Specification
• 10 Structure, function and maintenance standard
• 20 Standard value table
• 30 Testing and adjusting
• 40 Troubleshooting
• 50 Disassembly and assembly
• 90 Diagrams and drawings

Index and Foreword

Safety notices, shop manual reading conventions, maintenance standard terminology, handling of electric equipment and hydraulic components, engine connector procedures, wire code reading, push-pull coupler disconnection and connection, standard tightening torque tables and conversion tables.

Specification

Complete HM300-2R specifications including specification drawings, weight tables, fuel, coolant and lubricant requirements for the machine and its major assemblies.

Structure, Function and Maintenance Standard

Detailed coverage of the engine and cooling system, power train components (torque converter, transmission, drive shafts, axles, differentials, final drives, limited slip differential), steering system, brake system, undercarriage and frame, hydraulic system, cab and attachments, and electrical systems across multiple parts. Each section explains how components work, their construction, and the maintenance standard values to check during service.

Standard Value Table

Standard service value tables for the engine and chassis, giving the acceptable ranges and judgement criteria for testing, adjusting and troubleshooting.

Testing and Adjusting

Procedures for measuring and adjusting engine speed, intake air pressure, exhaust temperature and gas color, valve clearance, compression pressure, blow-by pressure, engine oil pressure, fuel system pressure and leakage, belt tension, torque converter stall speed, power train oil pressure, transmission speed sensor adjustment, brake oil pressure, accumulator nitrogen gas charging, brake performance, steering circuit pressure, suspension cylinder servicing, dump circuit pressure, body positioner sensor adjustment, and more. Also covers special machine monitor functions, KOMTRAX terminal operation and Pm Clinic check sheets.

Troubleshooting

Extensive troubleshooting coverage organized by failure code, electrical system (E-mode), hydraulic and mechanical system (H-mode), and engine (S-mode). Includes failure code tables, fuse and circuit breaker locations, connector pinout tables, and step-by-step diagnostic procedures for every listed code and symptom.

Disassembly and Assembly

Complete removal, installation, disassembly and assembly procedures for the engine and cooling system, power train, undercarriage and frame, hydraulic system, body, cab and electrical components. Includes coating material lists, special tool lists and tightening torques.

Diagrams and Drawings

Hydraulic circuit diagrams covering the power train, steering and hoist, brake and brake cooling systems. Electrical circuit diagrams for inside and outside the cab, payload meter wiring, and a complete connector table with arrangement drawings.

What This Manual Enables You to Do

With this Komatsu HM300-2R shop manual, you can carry out the full range of service work the machine demands. Engine overhauls and fuel system repairs on the SAA6D125E-5 are covered down to injector removal, cylinder head work and valve clearance adjustment. Transmission and torque converter service includes clutch pack disassembly, ECMV testing, speed sensor adjustment and stall speed measurement. Brake system work spans the front, center and parking brakes, including slack adjuster servicing, accumulator charging and bleeding procedures. Hydraulic troubleshooting covers the steering and hoist circuits, flow amp valve, hoist valve and cylinder overhaul.

For diagnostics, the failure code troubleshooting sections let you trace electrical and mechanical problems systematically. The electrical system E-mode troubleshooting walks through symptoms like starting failures, monitor display issues, lighting faults and emergency steering problems. The H-mode section addresses hydraulic and mechanical symptoms such as slow dump body operation, weak brakes, heavy steering and transmission shifting complaints. The S-mode engine troubleshooting covers hard starting, power loss, overheating, excessive oil consumption and abnormal noise. Standard value tables give you the exact pressures, torques, clearances and adjustment ranges to confirm a repair is correct before the machine goes back to work.

The HM300-2R is a production machine where downtime is expensive. Having the correct procedures and specifications on hand means fewer comebacks, less guesswork, and repairs done to Komatsu’s standards the first time. Whether you are a dealer technician, an independent shop, or a fleet maintenance operation running HM300-2R trucks in mining, quarrying or construction, this manual covers the systems you will actually work on.

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Delivered as an instant PDF download after purchase, the manual requires no shipping and no waiting. Use it on a laptop in the workshop, a tablet in the field, or print the pages you need for the job at hand. The complete manual is yours to keep and reference for the life of your HM300-2R.