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Make/Model Information:

  • Brand:   Iveco
  • Models included:
    • Iveco NEF N67-ENT-M45

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English (EN)
  • Number of pages:   213
  • File size:  ∼ 12.25 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   ENIV-0010

NOTE:  This list was created by program script and may not accurately represent the text from the source pages.   For full preview please click on 'Download sample':

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04_232_N
rrrrr NEF Engine Series
N67 ENT M45
Marine application
NEF ENgiNE
N67 ENT M45
TEchNical aNd REpaiR
MaNual
FEBRUARY 2007 Edition
T E C H N O L O G I C A L E X C E L L E N C E
1. FEBRUARY 2007 N67 ENT M45
SECTION CONTENTS
OVERVIEW 5
TECHNICAL DATA 53
ELECTRICAL EQUIPMENT 59
DIAGNOSTICS 85
MAINTENANCE 111
SERVICING OPERATIONS
ON INSTALLED ENGINE 117
TOOLS 131
OVERHAUL 139
SAFETY REGULATIONS 207
Section Page
indications for consultation
Sections 1-2-3 are intended for sales personnel, to provide
them with exact knowledge of the product’s characteris-
tics and enable them to meet the Customer’s demands
with precision.
The remaining sections are meant for personnel in charge of
carrying out ordinary and extraordinary maintenance; with
an attentive consultation of the chapter devoted to diagnos-
ing, they will also be able to provide an effective technical
assistance service.
ovERviEW 1. FEBRUARY 2007 N67 ENT M45
SECtion 1
IDENTIFYING DATA 7
COMMERCIAL CODE 8
PRODUCT MODEL NUMBER 9
ENGINE PARTS AND COMPONENTS 10
ENGINE ARCHITECTURE 12
Crankcase 12
Crankshaft 13
Connecting Rods 13
Pistons 14
Timing system driving gear 14
Cylinder head 16
Valves and valve seats 17
Ancillary machine members drive 17
COMBUSTION AIR INTAKE
AND EXHAUST SYSTEM 18
Comburent air filter 19
Turbocompressor 19
Air/sea-water heat exchanger 19
COOLING FRESH WATER CLOSED-LOOP 20
Exhaust manifold cooling 21
Thermostatic valve 22
Water pump 22
Additional expansion tank 22
SEA-WATER OPEN COOLING LOOP 23
Sea-water pump 24
Sea-water/coolant heat exchanger 24
ovERviEW
Page
(continues on next page)
ovERviEW 1. FEBRUARY 2007 N67 ENT M45
Page
ENGINE OIL LUBRICATION LOOP 25
Gear pump 26
Filter bracket 26
Oil vapour recirculation 26
FUEL LINE 27
Fuel supply system scheme 28
Fuel pre-filter 29
Fuel filter 30
Pump assembly 31
Low pressure feed pump 32
Pressure control solenoid valve 34
Low pressure limiter valve 34
Pressure control with engine at maximum rating 35
Pressure control with engine at minimum rating 36
High pressure pump 37
Rail and high pressure piping 39
Two-stage overpressure valve 39
Electro-injectors 40
Pressurization valve
of the electro-injector backflow 42
EDC 7 SYSTEM ELECTRONIC
AND ELECTRIC MAIN COMPONENTS 43
EDC 7 Electronic Central Unit 44
Air pressure/temperature sensor 44
Atmospheric pressure sensor 44
Oil pressure/temperature sensor 45
Crankshaft sensor 45
Camshaft sensor 46
Coolant temperature sensor 46
Fuel temperature sensor 47
Fuel pressure sensor 47
Pressure control solenoid 48
Throttle lever position 48
Page
SYSTEM FUNCTIONS 49
Run up 49
Starting 49
Metering and fuel injection 49
Injection advance management 49
Pre-injection 50
Injection pressure modulation 50
Idling adjusting 50
Self-diagnosis 50
EDC indicator light 50
Fuel heating 50
Linearization of the acceleration gradient 50
Balance of the cylinder torque delivery 50
Rotation speed control 50
Top speed limitation 50
Cut off 50
Derating 51
Recovery 51
After run 51
ovERviEW 1.7 FEBRUARY 2007 N67 ENT M45
IDENTIFYING DATA
Figure 2
Figure 1
Viale dell'Industria, 15/17 - 20010 Pregnana Mil.se MI - ITALY
ENGINE TYPE
ENGINE DWG
ENGINE S/N
COMMERC. TYPE / VERSION
POWER SET CODE
HOMOLOGA TION N
ENGINE F AMIL Y
POWER (KW ) AND SPEED (RPM )
YEAR OF BUILD
S. p. A.
04_002_N
The engine identification data are stenciled on a tag positioned over the flywheel case.
06_027_N
ovERviEW 1. FEBRUARY 2007 N67 ENT M45
COMMERCIAL CODE
The purpose of the commercial code is to make the characteristics of the product easier to understand, categorizing the engines
according to their family, origins and intended application. The commercial code, therefore, cannot be used for the technical
purpose of recognizing the engine’s components, which is served by the “ENGINE S/N”.
N 67 E N T M 45 . 1 0
ENGINE FAMILY IDENTIFIER: N = NEF
DISPLACEMENT: 67 = 6.700 cc NOMINAL
FUEL SUPPLY: E = ELECTRONIC INJECTION
BASE: N = NON STRUCTURAL
AIR INTAKE: T = INTERCOOLED SUPERCHARGED
APPLICATION: M = MARINE
MAXIMUM PERFORMANCE LEVEL ACHIEVABLE
45 = 450 HP
VERSION:
TURBOCHARGED:
1 = COOLED
2 = NOT COOLED
VERSION
ovERviEW 1. FEBRUARY 2007 N67 ENT M45
PRODUCT MODEL NUMBER
The model number is assigned by the manufacturer; it is used to identify the main characteristics of the engine, and to character-
ize its application and power output level. It is stamped on a side of crank-case, close to oil filter.
F 4 A E 0 6 8 6 B * E 1 0 3
ENGINE FAMILY IDENTIFIER
DESIGN ITERATION
ENGINE
NO. OF STROKES AND CYLINDER DISPOSITION (0 = 4 STROKES, VERTICAL)
NO. OF CYLINDERS
FUEL + INJECTION (8 = DIESEL, TCA, DIRECT INJECTION)
INTENDED USE (6 = MARINE)
POWER RANGE:
A = MAXIMUM POWER 450 HP
E = EMISSION FOR
MARINE APPLICATION
VARIANTS TO
BASIC ENGINE
tECHniCAl dAtA 2. FEBRUARY 2007 N67 ENT M45
SECtion 2
tECHniCAl dAtA
Page
GENERAL SPECIFICATIONS 55
Dimensions 57
ElECtRiCAl EQUiPMEnt . FEBRUARY 2007 N67 ENT M45
SECtion 
ElECtRiCAl EQUiPMEnt
Page
OVERALL 61
SYNOPTIC 62
WIRE HARNESS 63
LOCATION OF ELECTRICAL
COMPONENTS IN THE ENGINE 64
POWER SUPPLY LINE 65
ALTERNATOR 66
ELECTRICAL STARTER MOTOR 67
RELAY BOX 68
Relays contained in the relay box 68
RPM control 68
Diagnosis connector J1 68
Relay box connecto 69
CONNECTIONS OF THE CENTRAL
ELECTRONIC UNIT (ECU) EDC 7 70
Identification of terminal function 70
Electro-injectors connectors 74
EQUIPOTENTIAL CONNECTIONS
TO ENGINE GROUND 75
ELECTRICAL DIAGRAMS 76
Wiring diagram key 76
Electrical equipment component code 77
CAN - BUS converter module interface wiring 83
Supplementary services battery recharge 84
diAgnoStiCS 4. FEBRUARY 2007 N67 ENT M45
SECtion 4
diAgnoStiCS
Page
FOREWORD 87
ECU BEHAVIOUR 88
Anomalies indicator light 88
Blink code 88
Error deletion procedure 88
Recovery 88
BLINK CODE TABLE 89
DIAGNOSING WITH PT-01 INSTRUMENT 91
Functions of the Instrument 91
Identifier 91
Fault Memory 92
Parameter reading 92
Active diagnostics 92
MAJOR DIAGNOSTIC ACTIONS 93
Checking pressure in fuel supply line 93
Checking component resistance value 93
Checking line insulation 93
REFERENCE VALUES 94
For non hardwired sensors 94
For wired sensors powered by the ECU 95
GUIDE TO BLINK CODE DIAGNOSING 96
GUIDE TO SYMPTOM DIAGNOSING 106
MAintEnAnCE .111 FEBRUARY 2007 N67 ENT M45
SECtion 
MAintEnAnCE
Page
PERIODICITY OF CHECKS
AND MAINTENANCE OPERATIONS 113
PREPARING THE ENGINE
FOR LONG IDLE PERIODS 115
ENGINE’S FIRST START/RESTORING
NORMAL OPERATING CONDITIONS 115
SERviCing oPERAtionS on inStAllEd EnginE .117 FEBRUARY 2007 N67 ENT M45
SECtion 
SERviCing oPERAtionS
on inStAllEd EnginE
Page
FOREWORD 119
PRESCRIPTIONS FOR WORK
ON THE INJECTION SYSTEM 120
REPLACING THE ELECTRO-INJECTORS 121
Removal 121
Fitting 122
FUEL SYSTEM PIPING 123
VENTING THE AIR FROM THE FUEL FEED LOOP 124
VALVES CLEARANCE ADJUSTMENT 124
CLEANING THE ENGINE
COOLANT/SEA-WATER HEAT EXCHANGER 126
CLEANING THE AIR/SEA-WATER
HEAT EXCHANGER 127
MARINE PARTS DECOUPLING 128
INSTRUCTIONS FOR
DISEMBARKING THE ENGINE 130
Handling 130
toolS 7.11 FEBRUARY 2007 N67 ENT M45
SECtion 7
toolS
Page
TOOLS 133
ovERHAUl .1 FEBRUARY 2007 N67 ENT M45
SECtion 
ovERHAUl
Page
Graph and symbols 141
GENERAL SPECIFICATIONS 142
CLEARANCE DATA 143
ENGINE OVERHAUL - ENGINE
DISASSEMBLY AT THE BENCH 149
Foreword 149
Engine setting operations for
the assembly on turning stand 149
Components removal 151
CYLINDER UNIT 158
Checks and measurements 160
Checking head supporting
surface on cylinder unit 160
TIMING SYSTEM 161
Checking cam lift and pin alignment 162
Bushes 162
Bush replacement 164
Tappets 164
Fitting tappets - Camshaft 164
OUTPUT SHAFT 165
Measuring journals and crankpins 165
Replacing oil pump control gear 169
Fitting main bearings 169
Finding journal clearance 169
Checking crankshaft shoulder clearance 170
CONNECTING ROD - PISTON ASSEMBLY 171
Measuring piston diameter 172
Piston pins 172
Conditions for proper pin-piston coupling 172
(continues on next page)
ovERHAUl .140 FEBRUARY 2007 N67 ENT M45
Page
Split rings 172
Connecting rods 173
Bushes 174
Checking connecting rods 174
Checking torsion 174
Checking bending 175
Fitting connecting rod-piston assembly -
Connecting rod-piston coupling 175
Fitting split rings 176
Fitting connecting rod-piston
assembly into cylinder barrels 176
Finding crankpin clearance 177
Checking piston protrusion 178
CYLINDER HEAD 179
Removing the valves 179
Checking cylinder head wet seal 180
Checking cylinder head supporting surface 180
VALVES 181
Removing carbon deposits,
checking and grinding valves 181
Checking clearance between valve stem
and valve guide and valve centering 181
Valve guide 182
Regrinding - Replacing the valve seats 182
Valve springs 186
FITTING CYLINDER HEAD 186
INSTALLATION OF COMPONENTS 187
REFITTING THE CYLINDER HEAD 195
Injectors assembly 197
Adjusting valve clearance 199
Engine completion 202
TIGHTENING TORQUES 203
SAFEtY REgUlAtionS .207 FEBRUARY 2007 N67 ENT M45
SECtion 
SAFEtY REgUlAtionS
Page
SAFETY REGULATIONS 209
Standard safety regulations 209
Accident prevention 209
During maintenance 209
Respecting the Environment 210


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