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Yanmar 4JHE Service Manual

Yanmar 4JHE
317 pages
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Table of Contents

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Yanmar 4JHE Specifications

General IconGeneral
Engine Model4JHE
Number of Cylinders4
Cooling SystemWater-cooled
Starting SystemElectric starter
Lubrication SystemForced lubrication
AspirationNaturally aspirated

Summary

CHAPTER 1 GENERAL

Exterior Views

Illustrates the external components and layout of the engine models.

Specifications

Provides detailed technical specifications for different engine models.

Engine Cross Section

Shows a detailed cross-sectional view of the engine's internal components.

Dimensions

Presents dimensional drawings and measurements for various engine models.

CHAPTER 2 BASIC ENGINE PARTS

Cylinder Block Inspection and Servicing

Details procedures for inspecting and servicing the cylinder block, including bore measurement.

Cylinder Head Inspection and Valve Servicing

Outlines inspection and servicing for the cylinder head, valve seats, and springs.

Pistons and Piston Pins Servicing

Describes inspection, measurement, and replacement of pistons and piston pins.

Crankshaft and Main Bearing Inspection

Covers inspection procedures for the crankshaft and main bearings.

Timing Gear Inspection

Explains how to inspect the timing gears for wear and proper meshing.

CHAPTER 3 FUEL INJECTION EQUIPMENT

Fuel Supply System Overview

Explains the components and function of the fuel supply system.

Fuel Injection Pump Inspection and Servicing

Details inspection, disassembly, and reassembly of the fuel injection pump.

Fuel Injection Pump and Governor Adjustment

Covers adjustment procedures for the fuel injection pump and governor.

Fuel Injection Nozzle Servicing

Covers functioning, disassembly, inspection, and adjustment of fuel injection nozzles.

Troubleshooting Fuel System Issues

Provides guidance on diagnosing and correcting fuel system faults.

CHAPTER 4 INTAKE AND EXHAUST SYSTEM

Intake and Exhaust System Components

Illustrates the intake and exhaust systems for different engine models.

Turbocharger Specifications and Function

Provides turbocharger specifications, construction, function, and interchangeability.

Mixing Elbow Types and Inspection

Describes the construction and inspection of mixing elbows for different models.

CHAPTER 5 LUBRICATION SYSTEM

Lube Oil Pump Construction and Servicing

Details the lube oil pump's construction, specifications, and servicing.

Lube Oil Filter Specifications and Replacement

Covers lube oil filter specifications and replacement procedures.

Oil Pressure Control Valve Function

Explains the oil pressure control valve's construction and replacement.

Lube Oil Cooler Construction and Inspection

Details the lube oil cooler's construction and inspection methods.

CHAPTER 6 COOLING WATER SYSTEM

Cooling Water System Overview

Illustrates the fresh water and sea water circuits of the cooling system.

Sea Water Pump Construction and Specifications

Details the sea water pump's construction, specifications, and disassembly.

Fresh Water Pump Construction and Inspection

Covers the fresh water pump's construction, specifications, and inspection.

Heat Exchanger Specifications and Testing

Provides heat exchanger specifications and procedures for testing its integrity.

Thermostat Characteristics and Testing

Details thermostat characteristics and methods for testing its operation.

CHAPTER 7 REDUCTION AND REVERSING GEAR

KBW Gearbox Construction and Installation

Covers construction and installation procedures for KBW 20 and 21 gearboxes.

KMA Gearbox Construction and Shifting Device

Details KMA4 angle drive gearbox construction and its shifting mechanism.

Gearbox Inspection and Servicing

Outlines inspection and servicing procedures for KBW gearboxes.

Gearbox Disassembly and Reassembly

Provides instructions for disassembling and reassembling KBW gearboxes.

CHAPTER 8 REMOTE CONTROL (OPTIONAL)

Remote Control System Overview

Explains the remote control system components and their function.

Remote Control Installation Procedures

Details the installation steps for the remote control system.

Remote Control Inspection and Adjustment

Covers inspection and adjustment procedures for the remote control system.

CHAPTER 9 ELECTRICAL SYSTEM

Electrical System Diagrams

Shows wiring diagrams for various instrument panel types.

Battery Specifications and Maintenance

Covers battery capacity, cable types, inspection, and charging methods.

Starter Motor Construction and Performance

Details the starter motor's construction, specifications, and performance curves.

Alternator Specifications and Function

Provides alternator specifications, construction, functioning, and troubleshooting.

Instrument Panel and Wiring Codes

Lists instrument panel types, wiring harness, and extension cord part numbers.

CHAPTER 10 DISASSEMBLY AND REASSEMBLY

Disassembly and Reassembly Precautions

Provides essential precautions for safe and effective disassembly and reassembly of engine components.

Disassembly and Reassembly Tools

Lists and illustrates the necessary tools for engine disassembly and reassembly procedures.

General Disassembly and Reassembly Procedures

Details the step-by-step process for engine disassembly and reassembly.

Bolt and Nut Tightening Torque Specifications

Specifies correct tightening torques for various bolts and nuts during reassembly.

Engine Test Running Procedures

Outlines the steps and checks required for testing the engine after reassembly.

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