JAC HFC4DA1-2C User Manual

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
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Contents
Chapter I Technical Characteristics of Engine .......................................................................................................... 11
Section I Technical Requirements for Fuel, Oils, and Auxiliary Materials ..................................................... 11
Section II Main Technical Specification of Engine ............................................................................................ 14
Section III Performance Curve of Engine .......................................................................................................... 15
Section IV Main Checking and Adjustment Parameters .................................................................................. 16
Section V Tightening Torque for Critical Bolts of Engine ................................................................................. 17
Section VI Main Fitting Clearances and Allowable Wear Limits of Engine ................................................... 21
Section VII Specification of Main Attachments and Accessories ...................................................................... 24
Chapter II Maintenance for Main Structures of Engine ........................................................................................... 25
Section I Disassembly of Engine Assembly ......................................................................................................... 25
Section II Assembly of Engine ............................................................................................................................. 43
Section III Crankshaft and Flywheel System ..................................................................................................... 68
Section IV Piston and Connecting Rod Group ................................................................................................... 69
Section V Valve Distribution Mechanism ........................................................................................................... 70
Section VI Lubrication System ............................................................................................................................ 71
Section VII Cooling System ................................................................................................................................. 72
Section VIII Turbocharger and Inter-Cooler System ........................................................................................ 73
Section IX EGR System ........................................................................................................................................ 75
Section X Exhaust System .................................................................................................................................... 76
Chapter III Working Principle of Engine Control and Actuator Units ................................................................... 77
Section I Overview of Diesel Common Rail System .......................................................................................... 77
Section II Working Principle of Low Pressure Fuel Line System .................................................................... 79
Section III Working Theory of High Pressure Fuel Line .................................................................................. 82
Section IV Electronic Control Unit of High Pressure Common Rail System .................................................. 84
Chapter IV Engine Diagnosis .................................................................................................................................... 109
Section I. Precautions ......................................................................................................................................... 109
Section II. Maintenance Procedures ................................................................................................................. 111
Section III. Fault Diagnosis ................................................................................................................................ 113
Section IV. DTC List ........................................................................................................................................... 115
Section V. Fault Diagnosis for Electronic-Controlled Common Rail Diesel Engines .................................... 133

JAC HFC4DA1-2C Specifications

General

Engine Model	HFC4DA1-2C
Cylinders	4
Valves per Cylinder	2
Fuel System	Direct Injection
Bore x Stroke	93 mm x 102 mm
Compression Ratio	17.5:1
Engine Type	Diesel
Displacement	2.7L

Summary

Chapter I Technical Characteristics of Engine

Section I Technical Requirements for Fuel, Oils, and Auxiliary Materials

Details specifications and requirements for fuel, oils, and auxiliary materials to ensure proper engine operation.

Section II Main Technical Specification of Engine

Section IV Main Checking and Adjustment Parameters

Section V Tightening Torque for Critical Bolts of Engine

Specifies the correct tightening torques for important engine bolts to ensure proper assembly.

Section VI Main Fitting Clearances and Allowable Wear Limits of Engine

Chapter II Maintenance for Main Structures of Engine

Section I Disassembly of Engine Assembly

Provides a detailed procedure for safely disassembling the engine assembly.

Section II Assembly of Engine

Offers step-by-step instructions for the correct assembly of the engine.

Section VI Lubrication System

Section VII Cooling System

Chapter IV Engine Diagnosis

Section I. Precautions

Essential safety and preparatory measures to be taken before performing engine diagnosis.

Section II. Maintenance Procedures

Section III. Fault Diagnosis

Explains how to diagnose faults by analyzing fault information records and conditions.

Section IV. DTC List

A comprehensive list of Diagnostic Trouble Codes (DTCs) with their meanings.

Section V. Fault Diagnosis for Electronic-Controlled Common Rail Diesel Engines