Komatsu Diesel Engine 3D72-2, 3D75-2, 3D78-1, 3D84-2, 3D84N-2, 4D84-2 Shop Manual
Reference for Komatsu engine models 3D72-2 through 4D84-2. Documents engine specifications, disassembly, and reassembly procedures. Part number 00-1.
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Sample pages from the Komatsu Diesel Engine 3D72-2, 3D75-2, 3D78-1, 3D84-2, 3D84N-2, 4D84-2 Shop Manual manual
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Models Covered & Key Technical Specifications
Consolidated Specification Wiring Manual: Diesel Engine Komatsu 72-2, 75-2, 78-1, 84-2 series engine 3D72-2, 3D75-2, 3D78-1, 3D84-2, 3D84N-2, 4D84-2 shop manual OEM-Documentation Komatsu 4D84-2/Komatsu Limited (00-1) | Reference Collection Volume.
- Documented Engine Data: 2 liters specifies the standard displacement capacity across models.
- Technical Engine Specifications: For component data, 125 kg/cm² defines the maximum fuel injection pressure requirement.
- Universal Performance Metrics: 3000 rpm -- indicates the maximum operational speed for many engine configurations.
- Maximum Compression Ratios: The engine requires 18.0:1 for optimal combustion efficiency.
- System Air Induction: Intake stroke duration averages 180 degrees in standard operation.
- Prescribed Lubrication Specifications: The oil pump specifications maintain 2.0 kgf/cm² at 1800 rpm.
Manual Description & Preview
Consolidated Specification Wiring Manual: Diesel Engine Komatsu 72-2, 75-2, 78-1, 84-2 series engine 3D72-2, 3D75-2, 3D78-1, 3D84-2, 3D84N-2, 4D84-2 shop manual OEM-Documentation
Engineering-Metrics: 4D84-2/Komatsu Limited // Subsystem-Focus: Engine / Diesel Logic // Engineering-Metrics: Complete Repair Documentation.
| Specification | Technical-Path | Logic |
|---|---|---|
| Engine Models | 3D72-2, 3D75-2, 3D78-1, 3D84-2, 3D84N-2, 4D84-2 | Technical Specifications |
| Manual Type | Shop Manual | Procedural Documentation |
| Pages | 64 | Reference Material |
Maintenance information covers:
- General Engine Specifications
- Basic Engine Component Diagrams
- Fuel Injection System Details
- Lubrication System Procedures
- Cooling System Diagrams
Technical specifications are provided for the various engine components, including detailed diagrams and part breakdowns. Factory specifications are documented for critical engine systems such as the fuel injection, lubrication, and cooling systems, ensuring accurate service. Engine rebuild procedures are documented for complete overhauls and major component replacements. Drivetrain specifications are addressed in sections covering the timing gear and flywheel assemblies. Reassembly procedures are specified for all major engine sections, ensuring correct assembly after servicing.
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