JAC HFC7151M1V-U221B Manuale di istruzioni
江淮汽车 部门：客户服务部
WORKSHOP MANUAL
HFC7151M1V-U221B
Engine
Version No：JAC-201511030415001
江淮汽车 部门：客户服务部
Engine
FOREWORD CONTENT
This Manual is helpful for technical maintenance
staff for JAC and provides effective and correct
maintenance and service for JAC vehicle. To ensure
the customer satisfaction of the JAC products, it is
extremely essential that the professional maintenance
technicians for JAC have the friendly service and the
capability of proper operation; therefore, the
maintenance technicians must fully understand the
contents in this Manual. This Manual shall be
accessible for reference at any time.
All contents in this Manual, including pictures,
technical parameters are the latest. But if product
modification affects maintenance, JAC will provide
technical bulletin or supplementary volume. Therefore,
please obtain the latest information about this Manual.
JAC reserves the right to make change in design,
addition or improvement for the product.
This manual is a guide for vehicle maintenance, maintenance personnel must be strictly in
accordance with the maintenance manual operation. This product is a product that has precise
requirements, maintenance personnel must be professional with relevant skills, and
non-professional personnel are forbidden to disassemble vehicle privately. Due to complexity of
actual problem, for items not contained in the manual, please contact with company's customer
service, and operate under its guidance.
During the process of maintaining JAC vehicle, if genuine parts that are not from JAC or
disqualified oil, the vehicle may be damaged.
Overview & maintenance
Engine
Chassis
Body structure& electrical
Circuit
江淮汽车 部门：客户服务部
Engine
All rights reserved, without the written consent of JAC, it may not be translated all or a part
of this manual.
Tel：0086-551-62296644
Fax：0086-551-62296633
JAC International Customer Service Depart.
2015.11
江淮汽车 部门：客户服务部
Contents
Engine Contents
Chapter I Mechanical Part of Engine
Section I Engine Body
I. General Precautions
II. Preparation
III. Engine Assembly
IV. Drive Belt
V. Air Filter and Air Duct
VI. Intake Manifold and Exhaust Manifold
VII. Exhaust System
VIII. Timing sprocket mechanism
IX. Cylinder head
X. Valves
XI. Cylinder Body Assembly
XII. Diagnosis of Common Troubles
XIII. Parameters for Maintenance
Section II Engine Lubrication System
I. Precautions
II. Preparation
III. Lubrication system schematic diagram
IV. Engine Oil
V. Oil Pan and Engine Oil Pump
Section III Cooling System of Engine
I. Cooling Circuit
II. Engine Coolant
III. Radiator Cooling Fan
IV. Water Pump
V. Thermostat Sub-assembly
VI. Water Piping Sub-assembly
VII. Trouble Analysis
VIII. Parameters for Maintenance
Section IV Fuel Supply System of Engine
I. General Precautions
II. Preparation
III. Fuel System
IV. Fuel Injector and Guide Rail
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Contents
V. Fuel Filter
VI. Fuel Pump Assembly
VII. Fuel Tank Assembly
Section V Emission Control System of Engine
I. Fuel Evaporation Control System
II. Forced Ventilating System of Crankcase
Chapter II Electrical Part of Engine
Section I Ignition System
I. Ignition coil
II. Diagnosis of Common Troubles
III. Parameters for Maintenance
Section II Starting and Charging System
I. Principle Diagram of Starting and Charging System
II. Battery
III. Starting System
IV. Charging System
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Mechanical Part of
Engine
Chapter 1 Mechanical Part of Engine
Section 1 Engine Body
I. General Precautions
1. Precautions on Discharging Engine Coolant
Discharge coolant after engine has cooled down.
2. Precautions on Disconnecting Fuel Pipeline
1) Before the operation, ensure that the operating area is free of objects which may cause combustion
or sparks.
2) Disconnect the piping, plug openings to prevent leakage of fuel.
3. Precautions on Dismantlement and Disassembly
1) Use special tools as required in Instruction. Always operate safely; any forcible operations and
operations other than that specified in Instructions are forbidden.
2) Take particular care not to damage the matching face or the sliding face.
3) Use the adhesive tape or equivalent to cover the opening of engine system so as to prevent the
entry of foreign bodies, if necessary.
4) For the purpose of troubleshooting and reassembly, methodically mark and neaten the
disassembled parts.
5) When loosening the bolts and nuts, follow this basic principle: “outmost ones first, diagonal ones
second, and so on”. Conduct the operation in compliance with the loosening sequence, if specified.
4. Precautions on Check, Repair and Replacement
Thoroughly check the parts before repair or replacement. Check the substitutive parts by the same
means, and then replace as required.
5. Precautions on Assembly and Installation
1) Use the torque spanner to tighten the nuts and bolts.
2) When tightening the nuts and bolts, follow this basic principle: screw up the central nuts and bolts
with the same torque in steps, and then carry out the same operation with the internal and external
diagonal ones. Perform the operation in accordance with the tightening sequence, if it is specified.
3) Replace gaskets, oil seal or O-ring with new ones.
4) Thoroughly rinse, clean and dry every part. Carefully check the engine oil pipeline or engine coolant
pipeline for obstruction.
5) Never damage the sliding face and the matching face. Completely eliminate the foreign bodies such
as cloth scraps or the dust. Before assembly, paste the sliding face with engine oil.
6) When refilling engine coolant after draining completely, release air from the pipes at first.
7) After repair, start the engine and run with high speed to check for any leakage of the engine coolant,
fuel, engine oil and exhaust gas.
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Mechanical Part of
Engine
6. Parts Needed to Be Tightened with Specified Angle
1) Use the angle spanner to finally screw up following engine parts:
- Cylinder head bolt
- Bolt of main bearing cap
- Connecting rod bolt
2) Please follow the specified tightening methods.
3) Make sure that the surfaces of threads and pedestal are clean and coated with engine oil.
II. Precautions on Sealant
1. Removal of Sealant
After dismounting fixing nuts and bolts, use the
scraper to detach the matching faces and remove
old sealant.
Attention:
■ Do not damage the matching faces.
■ Insert the scraper, and then knock its side
to slide it as shown in the figure.
■ For the positions where it is difficult to use
scraper, lightly knock the parts to
dismount them with a plastic hammer.
■ If you have no choice but to use the tools
such as a screwdriver, be careful not to
damage the matching faces.
2. Application Steps of Sealant
1) Remove the attached old sealant from the
application and matching faces of liner with
scraper.
Attention:
■ Thoroughly remove the old sealant from
the groove on surfaces, fixing bolts and
bolt holes where the sealant was applied.
2) Wipe sealant surface and matching surface clean with a special cleaner, remove water drops,
grease and foreign substances.
JAC-T1F017
Fig.1.1.001
Fig.1.1.002
Slide
Knock
Scraper
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Mechanical Part of
Engine
3) Position sealant with the specified size.
■ Put the sealant into the groove for it (if any).
■ Generally, the sealant is put inside the bolt hole; however, it is occasionally put outside the bolt hole.
■ Install the matching part in a certain period of time after applying sealant.
■ Eliminate any dirt from the sealant.
■ Do not re-tighten the bolts or nuts after installation in order to avoid failures of bolts or nuts.
■ Add engine oil and coolant 30min after the installation has been finished.
Attention:
■ Conduct the operation in accordance with the instructions specified in this manual.
Fig.1.1.003
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Mechanical Part of
Engine
II. Preparation
1. Tools for Maintenance
List of Special Tools
No. Tool Appearance Code Description
1 End forked clamp
JAC-T1D001
Fix camshaft
timing
sprocket
2 Pin
Used together
with the end
forked clamp
3 Locating tool for
piston pin
JAC-T1F005
Used to install
and dismantle
the piston pin
4 Guide sleeve
Used together
with the
locating tool
for piston pin
5 Flywheel chock JAC-T1F011 Used to fix
the flywheel
6 Valve spring
compressor JAC-T1F012
Used to
compress the
valve spring
Install valve
cotter
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Mechanical Part of
Engine
7 Oxygen sensor
socket JAC-T1F015
Used to install
and dismantle
the oxygen
sensor
8 Dismantlement
tool for oil pan JAC-T1F017
Used to
dismantle the
oil pan
9 Installer for valve
oil seal JAC-T3F001
Used to install
the valve oil
seal
11
Guide for front oil
seal of
crankshaft
JAC-T3F003
Functioning as
a guide during
the installation
of front oil seal
of crankshaft
12
Installer for front
oil seal of
crankshaft
JAC-T3F004
Used to install
the front oil seal
of engine
crankshaft
13
Installer for rear
oil seal of
crankshaft
JAC-T3F005
Used to install
the rear oil seal
of crankshaft
Indice
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