Steyr f4 he9684 engine service repair manual

SERVICE MANUAL
F4CE9484 , F4CE9684 , F4DE9484 , F4DE9684 , F4DE9687 , F4GE9484 ,
F4GE9684 , F4HE9484 , F4HE9684
84328779 08/04/2010

Contents
INTRODUCTION
HYDRAULIC - PNEUMATIC - ELECTRICAL - ELECTRONIC SYSTEMSA
ELECTRICAL POWER SYSTEM ......................................................... A.30.A
ENGINE AND PTO IN ....................................................................B
ENGINE ................................................................................... B.10.A
FUEL AND INJECTION SYSTEM......................................................... B.20.A
AIR INTAKE SYSTEM..................................................................... B.30.A
EXHAUST SYSTEM....................................................................... B.40.A
ENGINE COOLANT SYSTEM ............................................................ B.50.A
LUBRICATION SYSTEM .................................................................. B.60.A
STARTING SYSTEM ...................................................................... B.80.A
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INTRODUCTION
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1

Contents
INTRODUCTION
Foreword ........................................................................................ 3
Safety rules ..................................................................................... 4
Torque .......................................................................................... 6
F4DE9484, F4HE9484, F4DE9684, F4DE9687, F4HE9684
Torque .......................................................................................... 9
F4CE9484, F4GE9484, F4CE9684, F4GE9684
Special tools .................................................................................. 11
Special tools .................................................................................. 18
F4CE9484, F4GE9484, F4CE9684, F4GE9684
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INTRODUCTION
Foreword
Engine Overhaul
Part of the operations illustrated within this manual can be partially executed while the engine is assembled on the
vehicle, depending on the room available for access to the engine and on the equipment application as well.
NOTE: With regard to the engine disassembly operations, please apply for information consulting the specific manual.
The following information relates to the engine overhaul operations only for what concerns the different components
customizing the engine, according to its specific duties.
In section "General Overhaul", all the operations of engine block overhaul have been contemplated. Therefore the
above mentioned section is to be considered as following the part hereby described.
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INTRODUCTION
Safety rules
Standard safety prescriptions
Particular attention shall be drawn on some precautions that must be followed absolutely in a standard working
area and whose non fulfillment will make any other measure useless or not sufficient to ensure safety to the
personnel in charge of maintenance.
Be informed and inform personnel as well of the laws in force regulating safety, providing information documentation
available for consultation.
• Keep working areas as clean as possible, ensuring adequate aeration.
• Ensure that working areas are provided with emergency boxes, that must be clearly visible and always provided
with adequate sanitary equipment.
• Provide for adequate fire extinguishing means, properly indicated and always having free access. Their efficiency
must be checked on a regular basis and the personnel must be trained on interventon methods and priorities.
• Organize and identify specific exit points to evacuate the areas in case of an emergency, providing for adequate
indications of the emergency indications of the emergency exit lines.
• Smoking in working areas subject to fire danger must be strictly prohibited.
• Provide warnings throughout adequate boards signaling danger, prohibitions and indications to ensure easy com-
prehension of the instructions even in case of an emergency.
Prevention of injury
• Do not wear unsuitable clothes for work, with fluttering ends, nor jewels such as and chains when working close
to engines and equipment in motion.
• Wear safety gloves and goggles when performing the following operations:
• • filling inhibitors or anti-frost
• lubrication oil topping or replacement
• utilization of compressed air or liquids under pressure (pressure allowed < 2 bar (29 psi)).
• Wear safety helmet when working close to hanging loads or equipment working at head height level.
• Always wear safety shoes and clothes adhering to the body, better if provided with elastics at the ends.
• Use protection cream for hands.
• Change wet clothes as soon as possible.
• In presence of electrical current exceeding 48 - 60 V verify efficiency of earth and mass electrical connections.
Ensure that hands and feet are dry and execute working operations utilizing isolating foot boards. Do not carry
out working operations if not trained for.
• Do not smoke nor light up flames close to batteries and to any fuel material.
• Put the dirty rags with oil, diesel fuel or solvents in anti-fire specially provided containers.
• Do not execute any intervention if not provided with necessary instructions.
• Do not use any tool or equipment for any different operation from the ones they’ve been designed and provided
for. Serious injury may occur.
• In case of test or calibration operations requiring engine running, ensure that the area is sufficiently ventilated or
utilize specific vacuum equipment to eliminate exhaust gas. Danger: poisoning or death.
During maintenance
• Never open filler cap of cooling system when the engine is hot. Operating pressure would provoke high tempera-
ture with serious danger and risk of burn. Wait until the temperature decreases under 50 °C (122 °F).
• Never top up an overheated engine with cooler and utilize only appropriate liquids.
• Always operate when the engine is tuned off; when particular circumstances require maintenance intervention on
running engine, be aware of all risks involved with such operation.
• Be equipped with adequate and safe containers for drainage operation of engine liquids and exhaust oil.
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INTRODUCTION
• Keep the engine clean from oil spills, diesel fuel and or chemical solvents.
• Use of solvents or detergents during maintenance may originate toxic vapors. Always keep working areas venti-
lated. Whenever necessary wear safety mask.
• Do not leave rags impregnated with flammable substances close to the engine.
• Upon engine start after maintenance, undertake proper preventing actions to stop air suction in case of a runaway
speed rate.
• Do not utilize fast screw tightening tools.
• Never disconnect batteries when the engine is running.
• Disconnect batteries before any intervention on the electrical system.
• Disconnect batteries from system before applying a load to them with the battery loader.
• After every intervention, verify that battery clamp polarity is correct and that the clamps are tight and safe from
accidental short circuit and oxidation.
• Do not disconnect and connect electrical connections in presence of electrical feed.
• Before proceeding with pipelines disassembly (pneumatic, hydraulic, fuel pipes) verify presence of liquid or air
under pressure. Take all necessary precautions bleeding and draining residual pressure or closing dump valves.
Always wear adequate safety mask or goggles. Non fulfillment of these precautions may cause serious injury and
poisoning.
• Avoid incorrect tightening or out of sequence. Danger: incorrect tightening may seriously damage engine’s com-
ponents, affecting engine’s duration.
• Avoid priming from fuel tanks made out of copper alloys and/or with ducts not being provided with filters.
• Do not modify cable wires: their lengths shall not be changed.
• Do not connect to the engine electrical equipment unless specifically approved by Iveco.
• Do not modify fuel systems or hydraulic system unless Iveco specific approval has been released. Any unautho-
rized modification will compromise warranty assistance and furthermore may affect engine correct working and
duration.
For engines equipped with electronic controller:
• Do not execute electric arc welding without having previously removed electronic controller.
• Remove electronic controller in case of any intervention requiring heating over 80 °C (176 °F) temperature.
• Do not paint the components and the electronic connections.
• Do not vary or alter any data filed in the electronic controller driving the engine. Any manipulation or alteration
of electronic components shall totally compromise engine assistance warranty and furthermore may affect engine
correct working and duration.
Respect of the Environment
• Respect of the Environment shall be of primary importance: all necessary precautions to ensure personnel’s safety
and health shall be adopted.
• Be informed and inform personnel as well of the laws in force regulating use and exhaust of liquids and engine
drain oil. Provide for adequate board indications and organic specific training courses to ensure that personnel is
fully aware of such law prescriptions and of basic preventative safety measures.
• Collect drain oils in adequate specially provided containers with hermetic sealing ensuring that storage is made in
specific, properly identified areas that shall be ventilated far from heat sources and not exposed to fire danger,
• Handle the batteries with care, storing them in ventilated environment and within anti-acid containers. Warning:
Battery exhalation represent serious danger of intoxication and environment contamination.
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SERVICE MANUAL
HYDRAULIC - PNEUMATIC - ELECTRICAL - ELECTRONIC SYSTEMS
F4CE9484 , F4CE9684 , F4DE9484 , F4DE9684 , F4DE9687 , F4GE9484 ,
F4GE9684 , F4HE9484 , F4HE9684
84328779 08/04/2010
A

HYDRAULIC - PNEUMATIC - ELECTRICAL - ELECTRONIC SYSTEMS - ELECTRICAL POWER SYSTEM
Alternator - Overview
F4CE9484, F4GE9484, F4CE9684, F4GE9684
ALTERNATORCG2 1
The alternator is placed on the front right hand side of the engine and is driven by a Poly V-belt.
Specifications:
• Working voltage:
• 12 V
• Current delivered:
• 90 A @ 6000 RPM
• Absorption in stand-by:
• Less than or equal to 1 mA
• Sense of rotation:
• Clockwise
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A.30.A / 3

Alternator - Remove
Prior operation:
Fan and drive Belt - Remove (B.50.A)
1. Remove the cables from the back of the alternator
(1).
2. Remove the retaining bolts (2) securing the alterna-
tor (1) to the support.
3. Remove the alternator (1).
ALTERNATOR 1
Next operation:
Alternator - Install (A.30.A)
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Alternator - Install
Prior operation:
Alternator - Remove (A.30.A)
1. Install the alternator (1) and tighten the bolts (2) to
the specified torque.
2. Connect the positive and negative cables onto the
back of the alternator.
ALTERNATOR 1
Next operation:
Fan and drive Belt - Install (B.50.A)
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Alternator - Remove
F4GE9484, F4GE9684
Prior operation:
1. Properly hold the alternator (1) separating it from its
support by loosening the screw (2).
2. Remove the screw, nut and washer.
3. Remove the alternator (1).
ALTERNATORG 1
Next operation:
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Alternator - Remove
F4CE9484, F4CE9684
Prior operation:
1. Properly hold the alternator (2) and loosen the screw
(3) to remove the alternator from its support.
2. Remove it from its bracket by loosening the screw
(1).
3. Recover the nuts and washers.
ALTERNATORC 1
Next operation:
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A.30.A / 7

Alternator - Install
F4CE9484, F4GE9484, F4CE9684, F4GE9684
Prior operation:
Alternator - Remove (A.30.A)
1. Connect the alternator (1) to the support.
2. Tighten the screw (2) without locking it.
ALTERNATORG 1
3. Fit the alternator (2) bracket (1) to the engine block.
4. Tighten the screws (3) fastening the alternator to the
support.
ALTERNATORCG 2
Next operation:
Fan and drive Belt - Install (B.50.A)
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ENGINE AND PTO IN - ENGINE
ENGINE - General specification
F4HE9484, F4HE9684
F4HECOMPLETE 1
The NEF F4HE engines are characterized by four stroke diesel cycles turbocharged with 4 or 6 cylinders and 4 valves
per cylinder.
They have high pressure injection fueling (common rail) and are entirely electronically driven in order to optimize the
working process in accordance to the operation, limiting pollution emissions and consumption as much as possible.
NOTE: Data, features and performance are valid only if the setter fully complies with all the installation prescriptions
provided by FPT.
Furthermore, the use of the unit after overhaul should conform to the original specified power and engine RPM for
which the engine has been designed.
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General Specifications
Engine Type 4 Cylinders 6 Cylinders
Cycle Four-Stroke diesel engine
Power Turbocharged with intercooler
Injection Direct
Number of cylinders 4 6
Bore 104 mm (4 in)
Stroke 132 mm (5 in)
Total Displacement 4485 cm³ 6728 cm³
Timing
Start before T.D.C. 18.5 °
End after B.D.C. 29.5 °
Start before B.D.C. 67 °
End after T.D.C. 35 °
Valve Clearance
Intake 0.20 - 0.30 mm (0.008 - 0.012 in)
Exhaust 0.45 - 0.55 mm (0.018 - 0.022 in)
Fuel Feed
Injection Type Bosch high pressure common rail
Control EDC7 ECU
Injector CRIU 2
Nozzle Type DSLA and DLLA
Injection Sequence 1-3-4-2 1-5-3-6-2-4
Injection pressure 250 - 1600 bar (3625 - 23200 psi)
Aspiration
Turbocharging Intercooled
Turbocharger Type Holset HX35
Lubrication
Oil Pressure @ Low Idle 0.7 bar (10 psi)
Oil Pressure @ Fast Idle 3.5 bar (51 psi)
Oil Pan Capacity 15 l (15.85 US qt)
Oil Filter Capacity 1 l (1.06 US qt)
Cooling
Water Pump Belt Driven
Thermostat 79 - 83 °C (174 - 181 °F)
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Clearance Data
Cylinder Block and Crankshaft Components
Cylinder Barrels 104.000 - 104.024 mm (4.094 - 4.095 in)
Oversize 0.4 mm (0.016 in)
Pistons
103.714 - 103.732 mm (4.083 - 4.084 in) / 103.759 - 103.777 mm (4.085 -
4.086 in) (*)
Skirt Height 55.9 mm (2.201 in) / 49.5 mm (1.949 in) (*)
Pin housing 38.010 - 38.016 mm (1.496 - 1.497 in)
Piston (oversize) 0.4 mm (0.016 in)
Protrusion 0.28 - 0.52 mm (0.011 - 0.020 in)
Pin 37.994 - 38.000 mm (1.496 - 1.496 in)
Piston Pin - Pin Housing 0.01 - 0.022 mm (0.0004 - 0.001 in)
Piston ring landings
Combustion 2.705 - 2.735 mm (0.106 - 0.108 in)
Intermediate 2.440 - 2.460 mm (0.096 - 0.097 in) / 2.420 - 2.440 mm (0.095 - 0.096 in) (*)
Oil Control 4.030 - 4.050 mm (0.159 - 0.159 in)
Piston Rings
Combustion 2.560 - 2.605 mm (0.101 - 0.103 in)
Intermediate 2.350 - 2.380 mm (0.093 - 0.094 in)
Oil Control 3.970 - 3.990 mm (0.156 - 0.157 in)
Piston Ring and Ring Landing Clearance
Combustion 0.100 - 0.175 mm (0.004 - 0.007 in)
Oil Control 0.040 - 0.080 mm (0.002 - 0.003 in)
Piston Ring End Gap
Combustion 0.30 - 0.40 mm (0.012 - 0.016 in)
Oil Control 0.30 - 0.55 mm (0.012 - 0.022 in)
Connecting Rod
Small end housing 40.987 - 41.013 mm (1.614 - 1.615 in)
Big end housing 72.987 - 73.013 mm (2.874 - 2.875 in)
Small end bushing Inside
Diameter
38.019 - 38.033 mm (1.497 - 1.497 in)
Big end bearing shell
thickness
1.955 - 1.968 mm (0.077 - 0.077 in)
Piston Pin and Bushing
Clearance
0.019 - 0.039 mm (0.001 - 0.002 in)
Oversize Big end bearing
Shells
0.250 mm (0.010 in) ; 0.500 mm (0.020 in)
Crankshaft
Main Journals 82.99 - 83.01 mm (3.267 - 3.268 in)
Crankpins 68.987 - 69.013 mm (2.716 - 2.717 in)
Main Bearing Shell Thickness 2.456 - 2.464 mm (0.097 - 0.098 in)
Big end Bearing Shell
Thickness
1.955 - 1.968 mm (0.077 - 0.078 in)
Main Bearing Bore
No. 1,5 / 1,7 87.982 - 88.008 mm (3.464 - 3.465 in)
No. 2,3,4 / 2,3,4,5,6 87.977 - 88.013 mm (3.464 - 3.465 in)
Bearing Shell and Journal Clearance
No. 1,5 / 1,7 0.041 - 0.119 mm (0.002 - 0.005 in)
No. 2,3,4 / 2,3,4,5,6 0.041 - 0.103 mm (0.002 - 0.004 in)
Bearing Shell and Crankpin
Clearance
0.033 - 0.041 mm (0.001 - 0.002 in)
(*) Valid for engines: F4HE9684P, F4HE9684A, F4HE9687P, F4HE9687A
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Clearance Data
Thrust Journal 37.475 - 37.545 mm (1.475 - 1.478 in)
Thrust Bearing Bore 32.180 - 32.280 mm (1.267 - 1.271 in)
Thrust Bearing 37.28 - 37.38 mm (1.468 - 1.472 in)
Crankshaft End Play 0.095 - 0.265 mm (0.004 - 0.010 in)
Cylinder Head and Components
Valve Guide Bore 7.042 - 7.062 mm (0.277 - 0.278 in)
Intake Valves
Stem diameter 6.970 - 6.990 mm (0.274 - 0.275 in)
Face angle 59.75 - 60.25 °
Exhaust Valves
Face angle 44.75 - 44.25 °
Valve Stem and Guide
Clearance
0.052 - 0.092 mm (0.002 - 0.004 in)
Valve Seat Bore
Intake 34.837 - 34.863 mm (1.372 - 1.373 in)
Exhaust 34.837 - 34.863 mm (1.372 - 1.373 in)
Valve seat Outside Diameter:
Intake 34.917 - 34.931 mm (1.375 - 1.375 in)
Exhaust 34.917 - 34.931 mm (1.375 - 1.375 in)
Valve Seat Angle
Intake 60 °
Exhaust 45 °
Valve Sink
Intake 0.59 - 1.11 mm (0.023 - 0.044 in)
Exhaust 0.96 - 1.48 mm (0.038 - 0.058 in)
Interference Between Valve Seat and Cylinder Head
Intake 0.054 - 0.094 mm (0.002 - 0.004 in)
Exhaust 0.054 - 0.094 mm (0.002 - 0.004 in)
Valve Spring Height
Free 47.75 mm (1.880 in)
Under a load equal to:
330.8 - 348.8 N (74.4 - 78.4
lb)
35.33 mm (1.391 in)
702 - 780 N (157.8 - 175.4 lb) 25.2 mm (0.992 in)
Camshaft Bore
No.1 (flywheel side) 59.222 - 59.248 mm (2.332 - 2.333 in)
No. 2,3,4,5 / 2,3,4,5,6,7 54.089 - 54.139 mm (2.129 - 2.131 in)
Camshaft Journals
1-5 / 1-7 53.995 - 54.045 mm (2.126 - 2.128 in)
Bushing inside diameter 54.083 - 54.147 mm (2.129 - 2.132 in)
Bushing and Journal Clearance 0.038 - 0.162 mm (0.001 - 0.006 in)
Cam Lift
Intake 7.582 mm (0.299 in)
Exhaust 6.045 mm (0.238 in)
Tappet Bore 16.000 - 16.030 mm (0.630 - 0.631 in)
Tappet outside diameter
Top 15.924 - 15.954 mm (0.627 - 0.628 in)
Middle 15.960 - 15.975 mm (0.628 - 0.629 in)
Bottom 15.924 - 15.954 mm (0.627 - 0.628 in)
Tappets and Bore Clearance 0.025 - 0.070 mm (0.001 - 0.003 in)
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Clearance Data
Rocker shaft 21.965 - 21.977 mm (0.865 - 0.865 in)
Rockers 22.001 - 22.027 mm (0.866 - 0.867 in)
Rockers and Shaft Clearance 0.024 - 0.162 mm (0.001 - 0.006 in)
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ENGINE - General specification
F4DE9484, F4DE9684, F4DE9687
F4DECOMPLETE 1
The NEF F4DE engines are characterized by four stroke diesel cycles turbocharged with 4 or 6 cylinders and 4 valves
per cylinder.
They have high pressure injection fueling (common rail) and are entirely electronically driven in order to optimize the
working process in accordance to the operation, limiting pollution emissions and consumption as much as possible.
NOTE: Data, features and performance are valid only if the setter fully complies with all the installation prescriptions
provided by FPT.
Furthermore, the use of the unit after overhaul should conform to the original specified power and engine RPM for
which the engine has been designed.
84328779 08/04/2010
B.10.A / 14

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General Specifications
Engine Type 4 Cylinders 6 Cylinders
Cycle Four-Stroke diesel engine
Power Turbocharged with intercooler
Injection Direct
Number of cylinders 4 6
Bore 104 mm (4 in)
Stroke 132 mm (5 in)
Total Displacement 4485 cm³ 6728 cm³
Timing
Start before T.D.C. 18.5 °
End after B.D.C. 29.5 °
Start before B.D.C. 67 °
End after T.D.C. 35 °
Valve Clearance
Intake 0.20 - 0.30 mm (0.008 - 0.012 in)
Exhaust 0.45 - 0.55 mm (0.018 - 0.022 in)
Fuel Feed
Injection Type Bosch high pressure common rail
Control EDC7 ECU
Injector CRIU 2
Nozzle Type DSLA and DLLA
Injection Sequence 1-3-4-2 1-5-3-6-2-4
Injection pressure 250 - 1600 bar (3625 - 23200 psi)
Aspiration
Turbocharging Intercooled
Turbocharger Type Holset HX35
Lubrication
Oil Pressure @ Low Idle 0.7 bar (10 psi)
Oil Pressure @ Fast Idle 3.5 bar (51 psi)
Oil Pan Capacity 15 l (15.85 US qt)
Oil Filter Capacity 1 l (1.06 US qt)
Cooling
Water Pump Belt Driven
Thermostat 79 - 83 °C (174 - 181 °F)
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Clearance Data
Cylinder Block and Crankshaft Components
Cylinder Barrels 104.000 - 104.024 mm (4.094 - 4.095 in)
Oversize 0.4 mm (0.016 in)
Pistons
103.714 - 103.732 mm (4.083 - 4.084 in) / 103.759 - 103.777 mm (4.085 -
4.086 in) (*)
Skirt Height 55.9 mm (2.201 in) / 49.5 mm (1.949 in) (*)
Pin housing 38.010 - 38.016 mm (1.496 - 1.497 in)
Piston (oversize) 0.4 mm (0.016 in)
Protrusion 0.28 - 0.52 mm (0.011 - 0.020 in)
Pin 37.994 - 38.000 mm (1.496 - 1.496 in)
Piston Pin - Pin Housing 0.01 - 0.022 mm (0.0004 - 0.001 in)
Piston ring landings
Combustion 2.705 - 2.735 mm (0.106 - 0.108 in)
Oil Control 4.030 - 4.050 mm (0.159 - 0.159 in)
Piston Rings
Combustion 2.560 - 2.605 mm (0.101 - 0.103 in)
Oil Control 3.970 - 3.990 mm (0.156 - 0.157 in)
Piston Ring and Ring Landing Clearance
Combustion 0.100 - 0.175 mm (0.004 - 0.007 in)
Oil Control 0.040 - 0.080 mm (0.002 - 0.003 in)
Piston Ring End Gap
Combustion 0.30 - 0.40 mm (0.012 - 0.016 in)
Oil Control 0.30 - 0.55 mm (0.012 - 0.022 in)
Connecting Rod
Small end housing 40.987 - 41.013 mm (1.614 - 1.615 in)
Big end housing 72.987 - 73.013 mm (2.874 - 2.875 in)
Small end bushing Inside
Diameter
38.019 - 38.033 mm (1.497 - 1.497 in)
Big end bearing shell
thickness
1.955 - 1.968 mm (0.077 - 0.077 in)
Piston Pin and Bushing
Clearance
0.019 - 0.039 mm (0.001 - 0.002 in)
Oversize Big end bearing
Shells
0.250 mm (0.010 in) ; 0.500 mm (0.020 in)
Crankshaft
Main Journals 82.99 - 83.01 mm (3.267 - 3.268 in)
Crankpins 68.987 - 69.013 mm (2.716 - 2.717 in)
Main Bearing Shell Thickness 2.456 - 2.464 mm (0.097 - 0.098 in)
Big end Bearing Shell
Thickness
1.955 - 1.968 mm (0.077 - 0.078 in)
Main Bearing Bore
No. 1,5 / 1,7 87.982 - 88.008 mm (3.464 - 3.465 in)
No. 2,3,4 / 2,3,4,5,6 87.977 - 88.013 mm (3.464 - 3.465 in)
Bearing Shell and Journal Clearance
No. 1,5 / 1,7 0.041 - 0.119 mm (0.002 - 0.005 in)
No. 2,3,4 / 2,3,4,5,6 0.041 - 0.103 mm (0.002 - 0.004 in)
Bearing Shell and Crankpin
Clearance
0.033 - 0.041 mm (0.001 - 0.002 in)
(*) Valid for engines: F4DE9684A.
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Clearance Data
Thrust Journal 37.475 - 37.545 mm (1.475 - 1.478 in)
Thrust Bearing Bore 32.180 - 32.280 mm (1.267 - 1.271 in)
Thrust Bearing 37.28 - 37.38 mm (1.468 - 1.472 in)
Crankshaft End Play 0.095 - 0.265 mm (0.004 - 0.010 in)
Cylinder Head and Components
Valve Guide Bore 7.042 - 7.062 mm (0.277 - 0.278 in)
Intake Valves
Face angle 59.75 - 60.25 °
Exhaust Valves
Face angle 44.75 - 44.25 °
Valve Stem and Guide
Clearance
0.052 - 0.092 mm (0.002 - 0.004 in)
Valve Seat Bore
Intake 34.837 - 34.863 mm (1.372 - 1.373 in)
Exhaust 34.837 - 34.863 mm (1.372 - 1.373 in)
Valve seat Outside Diameter:
Intake 34.917 - 34.931 mm (1.375 - 1.375 in)
Exhaust 34.917 - 34.931 mm (1.375 - 1.375 in)
Valve Seat Angle
Intake 60 °
Exhaust 45 °
Valve Sink
Intake 0.59 - 1.11 mm (0.023 - 0.044 in)
Exhaust 0.96 - 1.48 mm (0.038 - 0.058 in)
Interference Between Valve Seat and Cylinder Head
Intake 0.054 - 0.094 mm (0.002 - 0.004 in)
Exhaust 0.054 - 0.094 mm (0.002 - 0.004 in)
Valve Spring Height
Free 47.75 mm (1.880 in)
330.8 - 348.8 N (74.4 - 78.4
lb)
35.33 mm (1.391 in)
702 - 780 N (157.8 - 175.4 lb) 25.2 mm (0.992 in)
Camshaft Bore
No.1 (flywheel side) 59.222 - 59.248 mm (2.332 - 2.333 in)
No. 2,3,4,5 / 2,3,4,5,6,7 54.089 - 54.139 mm (2.129 - 2.131 in)
Camshaft Journals
1-5 / 1-7 53.995 - 54.045 mm (2.126 - 2.128 in)
Bushing inside diameter 54.083 - 54.147 mm (2.129 - 2.132 in)
Bushing and Journal Clearance 0.038 - 0.162 mm (0.001 - 0.006 in)
Cam Lift
Intake 7.582 mm (0.299 in)
Exhaust 6.045 mm (0.238 in)
Tappet Bore 16.000 - 16.030 mm (0.630 - 0.631 in)
Tappet outside diameter
Top 15.924 - 15.954 mm (0.627 - 0.628 in)
Middle 15.960 - 15.975 mm (0.628 - 0.629 in)
Bottom 15.924 - 15.954 mm (0.627 - 0.628 in)
Tappets and Bore Clearance 0.025 - 0.070 mm (0.001 - 0.003 in)
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Clearance Data
Rocker shaft 21.965 - 21.977 mm (0.865 - 0.865 in)
Rockers 22.001 - 22.027 mm (0.866 - 0.867 in)
Rockers and Shaft Clearance 0.024 - 0.162 mm (0.001 - 0.006 in)
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ENGINE - Service limits Maintenance Planning
To ensure optimized working conditions, in the following pages we are providing instructions for the overhaul control
interventions, checks and setting operations that must be performed on the engine at due planned dates.
The frequency of the maintenance operations is just an indication since the use of the engine is the main characteristic
to determine and evaluate replacements and checks.
It is not only allowed but recommended that the staff in charge of the maintenance should also carry out the necessary
maintenance and controlling operations even if not being included in the ones listed here below but that may be
suggested by common sense and by the specific conditions in which the engine is run.
Regular maintenance and inspection planning
Checks and periodical inspections Frequency (hours)
Visual check of engine Daily
Inspection presence of water in fuel filter or pre-filter Daily
Inspection blow-by filter elements -
Inspection of belt wear status -
Inspection and setting of tappet clearance 4000
EDC When anomaly occurs
Replacement of engine’s oil and filter 500
Replacement of pre-filter 1000
Replacement of fuel filter 500
Replacement of blow-by filter 500
Replacement of belt 1500
NOTICE: The frequency of the maintenance operations is just an indication since the use of the engine is the main
characteristic to determine and evaluate replacement and checks.
The maintenance operations are valid only if the setter fully complies with all the installation prescriptions provided by
Iveco Motors.
Furthermore, the users assembled by the setter shall always be in conformance to couple, power and number of turns
based on which the engine has been designed.
Daily Maintenance Checks
It is a good habit to execute, before engine start, a series of simple checks that might represent a valid warranty
to avoid inconveniences, even serious, during engine running. Such checks are usually up to the operators and
to the vehicle’s drivers.
• Fluid levels and checks of any eventual leakage from the fuel, cooling and lubricating circuits.
• Notify the maintenance if any inconvenience is detected or if any filling is necessary.
After engine start and while engine is running, proceed with the following checks and controls:
• check presence of any eventual leakage from the fuel, cooling and lubricating circuits.
• Verify absence of noise or unusual rattle during engine working.
• Verify, using vehicle devices, the prescribed pressure, temperature and other parameters.
• Visual check of fumes (color of exhaust emissions)
• Visual check of cooling liquid level, in the expansion tank.
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Steyr f4 he9684 engine service repair manual

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