Yanmar 2TNV70, 3TNV70, 3TNV76 Diesel Index:

• COVER
• PREFACE
• SAFETY LABELS
• Safety Precautions
• Precautions for Service Work
• CONTENTS
• 1. General
  • 1.1 Engine Nomenclature
  • 1.2 Specifications
  • 1.3 Fuel Oil, Lubricating Oil and Cooling water
    • 1.3.1 Fuel oil
    • 1.3.2 Lubricating oil
    • 1.3.3 Cooling water
  • 1.4 Engine External Views
  • 1.5 Structural Description
  • 1.6 Exhaust gas emission regulation
    • 1.6.1 The Emission Standard in USA
    • 1.6.2 Engine identification
    • 1.6.3 Guarantee Conditions for the EPA Emission Standard
• 2. Inspection and Adjustment
  • 2.1 Periodic Maintenance Schedule
  • 2.2 Periodic Inspection and Maintenance Procedure
    • 2.2.1 Check before Daily Operation
    • 2.2.2 inspection after initial 50 hours operation
    • 2.2.3 Inspection every 50 hours
    • 2.2.4 Inspection every 250 hours or 3 months
    • 2.2.5 Inspection every 500 hours or 6 months
    • 2.2.6 Inspection every 1,000 hours or one year
    • 2.2.7 Inspection every 2000 hours or 2 years
  • 2.3 Adjusting the no-load maximum or minimum speed
  • 2.4 Sensor Inspection
    • 2.4.1 Oil pressure switch
    • 2.4.2 Thermo switch
  • 2.5 Water leak check in cooling water system
  • 2.6 Radiator cap inspection
  • 2.7 Thermostat inspection
  • 2.8 Adjusting Operation
  • 2.9 Long storage
• 3. TROUBLESHOOTING
  • 3.1 Preparation before troubleshooting
  • 3.2 Quick Reference Table for Troubleshooting
  • 3.3 Troubleshooting by measuring Compression Pressure
• 4. Disassembly, Inspection and Reassembly of Engines
  • 4.1 Complete disassembly and reassembly
    • 4.1.1 Introduction
    • 4.1.2 Special service tools
    • 4.1.3 Complete disassembly
    • 4.1.4 Precautions before and during reassembly
    • 4.1.5 Adjusting operation
  • 4.2 Cylinder Head: Disassembly, Inspection and Reassembly
    • 4.2.1 Components (2-valve cylinder head)
    • 4.2.2 Disassembly procedure:
    • 4.2.3 Reassembly procedure:
    • 4.2.4 Servicing points
    • 4.2.5 Parts Inspection and measurement
    • 4.2.6 Valve seat correction
    • 4.2.7 Valve guide replacement
    • 4.2.8 Valve stem seal replacement
  • 4.3 Gear Train and Camshaft
    • 4.3.1 Components
    • 4.3.2 Disassembly procedure:
    • 4.3.3 Reassembly procedure:
    • 4.3.4 Servicing points
    • 4.3.5 Parts inspection and measurement
    • 4.3.6 Oil seal replacement
    • 4.3.7 Camshaft bushing replacement
  • 4.4 Cylinder Block
    • 4.4.1 Components
    • 4.4.2 Disassembly procedure:
    • 4.4.3 Reassembly procedure:
    • 4.4.4 Servicing points
    • 4.4.5 Parts inspection and measurement
    • 4.4.6 Cylinder bore correction
    • 4.4.7 Piston pin metal replacement
    • 4.4.8 Oil seal replacement (Flywheel housing side)
• 5. LUBRICATION SYSTEM
  • 5.1 Lubrication System Diagram
  • 5.2 Trochoid Pump Components
  • 5.3 Disassembly(Reverse the below procedure for reassembly)
  • 5.4 Servicing Points
  • 5.5 Parts Inspection and Measurement
    • 5.5.1 Trochoid pump inspection and measurement
• 6. COOLING SYSTEM
  • 6.1 Cooling water System
  • 6.2 Cooling Water Pump Components 91
  • 6.3 Disassembly (Reverse the below procedure for reassembly)
  • 6.4 Servicing Points
• 7. FUEL INJECTION PUMP / GOVERNOR
  • 7.1 Introduction
  • 7.2 Fuel Injection Pump
    • 7.2.1 Fuel system diagram
    • 7.2.2 External view and components
    • 7.2.3 Disassembly procedure:
    • 7.2.4 Reassembly procedure
    • 7.2.5 Confirmation and adjustment of fuel injection timing
    • 7.2.6 Confirmation and adjustment of no-load maximum and minimum speed
• 8. The specifications of a starting motor and the characteristics
  • 8.1 The specifications and the characteristics
    • 8.1.1 Specifications
    • 8.1.2 Characteristics
  • 8.2 The structure of a starting motor and the wiring diagram
    • 8.2.1 Structure
    • 8.2.2 Wiring diagram of a starting motor
  • 8.3 Performance
• 9. ALTERNATOR
  • 9.1 20A Alternator
    • 9.1.1 Specifications
    • 9.1.2 Structure
    • 9.1.3 Wiring diagram
    • 9.1.4 Standard output characteristics
    • 9.1.5 Inspection
  • 9.2 40A Alternator
    • 9.2.1 Components
    • 9.2.2 Specifications
    • 9.2.3 Wiring diagram
    • 9.2.4 Standard output characteristics
    • 9.2.5 Inspection
  • 9.3 Troubleshooting
• 10. Electric Wiring
  • 10.1 Electric Wiring Diagram
    • 10.1.1 Alternator
    • 10.1.2 Starting motor
    • 10.1.3 Current limiter
    • 10.1.4 Section area and resistance of electric wire
• 11. SERVICE STANDARDS
  • 11.1 Engine Tuning
  • 11.2 Engine Body
    • 11.2.1 Cylinder head
    • 11.2.2 Gear train and camshaft
    • 11.2.3 Cylinder block
  • 11.3 Lubricating Oil System (Trochoid Pump)
• 12. Tightening Torque for Bolts and Nuts
  • 12.1 Tightening Torques for Main Bolts and Nuts
  • 12.2 Tightening Torques for Standard Bolts and Nuts
• BACKCOVER