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Yanmar 4JH-HTE Service Manual

Yanmar 4JH-HTE
317 pages
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Table of Contents

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Yanmar 4JH-HTE Specifications

General IconGeneral
Engine Model4JH-HTE
Number of Cylinders4
Fuel SystemDirect Injection
Max Output75 HP
Cooling SystemFreshwater cooling
Starting SystemElectric Start
Lubrication SystemForced lubricating

Summary

Chapter 1 General

1. Exterior Views

Illustrates external components and configurations of the engine models.

2. Specifications

Provides key technical data, dimensions, and performance ratings for the engine models.

3. Construction

Outlines the materials and design of major engine components and systems.

4. Performance Curves

Displays graphical representations of engine output, torque, and fuel consumption.

5. Engine Cross Section

Illustrates internal workings and component arrangement through sectional views.

6. Dimensions

Lists physical dimensions and measurements for the engine and its parts.

7. Piping Diagrams

Shows layout and connections of various piping systems, including fuel and coolant.

8. Parts Interchangeability

Details which parts are common or replaceable across different engine models.

Chapter 2 Inspection and Servicing of Basic Engine Parts

1. Cylinder Block

Covers methods for inspecting, cleaning, and measuring the engine's cylinder block.

2. Cylinder Liners

Details the process for measuring cylinder liner wear and replacing them.

3. Cylinder Head

Covers inspection, repair, and adjustment procedures for the cylinder head and its components.

4. Pistons and Piston Pins

Outlines procedures for inspecting piston and piston pin wear and replacement.

5. Connecting Rod

Details methods for checking connecting rod twist, parallelism, and clearance.

6. Crankshaft and Main Bearing

Covers inspection, bending checks, and measurement of crankshaft and main bearings.

7. Camshaft and Tappets

Details procedures for checking camshaft wear, height, and tappet condition.

8. Timing Gear

Covers inspection of timing gears for wear and backlash.

9. Flywheel and Housing

Details procedures for inspecting and servicing the flywheel and its mounting components.

Chapter 3 Fuel Injection Equipment

1. Fuel Supply System

Explains the components and operation of the engine's fuel supply system.

2. Disassembly, Reassembly and Inspection of Governor

Guides on disassembling, reassembling, and inspecting the engine governor.

3. Disassembly, Reassembly and Inspection of Fuel Injection Pump

Provides detailed steps for disassembling, inspecting, and reassembling the fuel injection pump.

4. Adjustment of Fuel Injection Pump and Governor

Outlines the process for adjusting fuel injection timing and governor settings.

5. Automatic Timer

Explains the design and operation of the automatic timer used in the fuel injection system.

6. Fuel Feed Pump

Details the construction, specifications, and maintenance of the fuel feed pump.

7. Fuel Injection Nozzle

Covers the operation, inspection, and servicing procedures for fuel injection nozzles.

8. Troubleshooting

Lists common problems, their causes, and recommended solutions for the fuel system.

9. Fuel Injection Pump Service Data

Provides specific technical data and calibration values for fuel injection pumps.

10. Tools

Lists and illustrates the specialized tools needed for fuel system servicing.

11. Fuel Filter

Details the specifications and replacement intervals for the fuel filter.

12. Fuel Tank (Optional)

Provides specifications and dimensional drawings for the optional fuel tank.

13. Design Change of Fuel Piping Line

Details modifications made to the fuel piping lines and their implications.

Chapter 4 Intake and Exhaust System

1. Intake and Exhaust System

Explains the basic layout and function of the engine's intake and exhaust systems.

2. Intake Silencer

Details the construction and inspection procedures for the intake silencer.

3. Intake Manifold

Covers the construction and inspection methods for the intake manifold.

4. Turbocharger

Details turbocharger specifications, construction, and operational principles.

5. Mixing Elbow

Describes the construction and inspection of different types of mixing elbows.

6. Breather

Outlines the construction and inspection procedures for the breather system.

Chapter 5 Lubrication System

1. Lubrication System

Explains the components and flow of the engine's lubrication system.

2. Lube Oil Pump

Details the construction, specifications, and disassembly of the lube oil pump.

3. Lube Oil Filter

Covers the construction and replacement procedures for the lube oil filter.

4. Oil Pressure Control Valve

Explains the construction and replacement of the oil pressure control valve.

5. Lube Oil Cooler

Details the construction and inspection of the lube oil cooler.

6. Piston Cooling Nozzle

Covers the construction and inspection of piston cooling nozzles.

7. Rotary Waste Oil Pump (Optional)

Describes the construction and inspection of the optional rotary waste oil pump.

Chapter 6 Cooling Water System

1. Cooling Water System

Explains the general operation of the cooling water system.

2. Sea Water Pump

Details the construction, specifications, and maintenance of the sea water pump.

3. Fresh Water Pump

Covers the construction, specifications, and servicing of the fresh water pump.

4. Heat Exchanger

Details the construction and specifications of the heat exchanger.

5. Pressure Cap and Sub Tank

Explains the construction and inspection of the pressure cap and sub tank.

6. Thermostat

Covers the operation, construction, and testing procedures for the thermostat.

7. Kingston Cock (Optional)

Details the construction and inspection of the optional Kingston cock.

8. Sea Water Filter (Optional)

Describes the construction and inspection of the optional sea water filter.

9. Bilge Pump and Bilge Strainer (Optional)

Provides specifications for the optional bilge pump and strainer.

Chapter 7 Reduction and Reversing Gear

1. Construction

Explains the construction and design of the reduction and reversing gear models.

2. Installation

Guides on the installation of the marine gearbox, including remote control and clutch operation.

3. Operation and Maintenance

Covers daily operation checks, oil changes, and recommended lubricants.

4. Inspection and Servicing

Details inspection and servicing methods for various internal components of the gearbox.

5. Disassembly

Provides a detailed guide on how to disassemble the marine gearbox.

6. Reassembly

Offers a comprehensive guide on reassembling the marine gearbox.

7. Special Tools

Identifies and illustrates the specialized tools required for gearbox maintenance.

Chapter 8 Remote Control (Optional)

1. Remote Control System

Explains the components and function of the remote control system for engine operation.

2. Remote Control Installation

Guides on the installation of speed, clutch, and engine stop controls.

3. Remote Control Inspection

Outlines checks for proper function and condition of the remote control cables and linkages.

4. Remote Control Adjustment

Details how to adjust the shift lever and throttle controls for optimal performance.

Chapter 9 Electrical System

1. Electrical System

Presents wiring diagrams and component layouts for the engine's electrical system.

2. Battery

Covers battery construction, capacity specifications, and charging procedures.

3. Starter Motor

Details starter motor specifications, construction, performance, and troubleshooting.

4. Alternator Standard, 12V/55A

Provides specifications, characteristics, and construction details for the standard alternator.

5. Instrument panel and wiring codes

Describes different instrument panel types and their corresponding wiring codes.

6. Warning Devices

Explains the function and inspection of warning lamps and sensors.

7. Air Heater (Optional)

Details the specifications and operation of the optional air heater.

8. Electric type Engine Stopping Device (Optional)

Explains the components and operation of the optional electric engine stopping device.

9. Tachometer

Covers tachometer sender unit specifications and measurement procedures.

10. Alternator 12V/80A (OPTIONAL)

Details specifications, features, and construction of the optional 12V/80A alternator.

Chapter 10 Disassembly and Reassembly

1. Disassembly and Reassembly Precautions

Lists essential precautions and preparation steps for engine disassembly and reassembly.

2. Disassembly and Reassembly Tools

Identifies and illustrates the general and special tools needed for engine service.

3. Disassembly and Reassembly

Provides detailed, sequential instructions for disassembling and reassembling engine components.

4. Bolt/nut Tightening Torque

Lists the specified tightening torques for engine and component fasteners.

5. Test Running

Outlines the steps for conducting a test run and checks after engine reassembly.

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