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Make/Model Information:

  • Brand:   Iveco
  • Models included:
    • Iveco NEF N40-ENT-M25
    • Iveco NEF N60-ENT-M37
    • Iveco NEF N60-ENT-M40

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English (EN)
  • Number of pages:   223
  • File size:  ∼ 11.08 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   ENIV-0006

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
N40 ENT M25
N60 ENT M37
N60 ENT M40
NEF Engine Series
Marine application
NEF ENgiNE
N40 ENT M25
N60 ENT M37
N60 ENT M40
TEchNical aNd REpaiR
MaNual
MARCH 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
ovERviEW 1.5 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
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. MARCH 2007 N40 ENT M25
N60 ENT M37-M40
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
tECHniCAl dAtA 2.5 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 2
tECHniCAl dAtA
Page
GENERAL SPECIFICATIONS 55
Dimensions 58
ElECtRiCAl EQUiPMEnt .5 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 
ElECtRiCAl EQUiPMEnt
Page
OVERALL 62
SYNOPTIC 64
WIRE HARNESS 65
LOCATION OF ELECTRICAL
COMPONENTS IN THE ENGINE 66
POWER SUPPLY LINE 67
ALTERNATOR 68
ELECTRICAL STARTER MOTOR 69
RELAY BOX 70
Relays contained in the relay box 70
RPM control 70
Diagnosis connector J1 70
Relay box connectors 71
CONNECTIONS OF THE CENTRAL
ELECTRONIC UNIT (ECU) EDC 7 72
Identification of terminal function 72
Electro-injectors connectors 76
EQUIPOTENTIAL CONNECTIONS
TO ENGINE GROUND 77
ELECTRICAL DIAGRAMS 78
Wiring diagram key 78
Electrical equipment component code 79
Equipment versions until 10/2003 81
Equipment versions since 11/2003 85
CAN - BUS converter module interface wiring 93
Supplementary services battery recharge 94
diAgnoStiCS 4.5 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 4
diAgnoStiCS
Page
FOREWORD 97
ECU BEHAVIOUR 98
Anomalies indicator light 98
Blink code 98
Error deletion procedure 98
Recovery 98
BLINK CODE TABLE 99
DIAGNOSING WITH PT-01 INSTRUMENT 101
Functions of the Instrument 101
Identifier 101
Fault Memory 102
Parameter reading 102
Active diagnostics 102
MAJOR DIAGNOSTIC ACTIONS 103
Checking pressure in fuel supply line 103
Checking component resistance value 103
Checking line insulation 103
REFERENCE VALUES 104
For non hardwired sensors 104
For wired sensors powered by the ECU 105
GUIDE TO BLINK CODE DIAGNOSING 106
GUIDE TO SYMPTOM DIAGNOSING 116
MAintEnAnCE 5.121 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 5
MAintEnAnCE
Page
PERIODICITY OF CHECKS
AND MAINTENANCE OPERATIONS 122
PREPARING THE ENGINE
FOR LONG IDLE PERIODS 125
ENGINE’S FIRST START/RESTORING
NORMAL OPERATING CONDITIONS 125
SERviCing oPERAtionS on inStAllEd EnginE .127 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 
SERviCing oPERAtionS
on inStAllEd EnginE
Page
FOREWORD 129
PRESCRIPTIONS FOR WORK
ON THE INJECTION SYSTEM 130
REPLACING THE ELECTRO-INJECTORS 131
Removal 131
Fitting 132
FUEL SYSTEM PIPING 133
VENTING THE AIR FROM THE FUEL FEED LOOP 134
VALVES CLEARANCE ADJUSTMENT 135
CLEANING THE ENGINE
COOLANT/SEA-WATER HEAT EXCHANGER 136
CLEANING THE AIR/SEA-WATER
HEAT EXCHANGER 137
MARINE PARTS DECOUPLING 138
INSTRUCTIONS FOR
DISEMBARKING THE ENGINE 140
Handling 140
toolS 7.141 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 7
toolS
Page
TOOLS 143
ovERHAUl 8.14 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 8
ovERHAUl
Page
Graph and symbols 151
GENERAL SPECIFICATIONS 152
CLEARANCE DATA 153
ENGINE OVERHAUL - ENGINE
DISASSEMBLY AT THE BENCH 159
Foreword 159
Engine setting operations
for the assembly on turning stand 159
Components removal 161
CYLINDER UNIT 168
Checks and measurements 170
Checking head supporting
surface on cylinder unit 170
TIMING SYSTEM 171
Checking cam lift and pin alignment 172
Bushes 172
Bush replacement 174
Tappets 174
Fitting tappets - Camshaft 174
OUTPUT SHAFT 175
Measuring journals and crankpins 175
Replacing oil pump control gear 179
Fitting main bearings 179
Finding journal clearance 179
Checking crankshaft shoulder clearance 180
CONNECTING ROD - PISTON ASSEMBLY 181
(continues on next page)
ovERHAUl 8.150 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
Page Page
Measuring piston diameter 182
Piston pins 182
Conditions for proper pin-piston coupling 182
Split rings 182
Connecting rods 183
Bushes 184
Checking connecting rods 184
Checking torsion 184
Checking bending 185
Fitting connecting rod-piston
assembly - Connecting rod-piston coupling 185
Fitting split rings 186
Fitting connecting rod-piston
assembly into cylinder barrels 186
Finding crankpin clearance 187
Checking piston protrusion 188
CYLINDER HEAD 189
Removing the valves 189
Checking cylinder head wet seal 190
Checking cylinder head supporting surface 190
VALVES 191
Removing carbon deposits,
checking and grinding valves 191
Checking clearance between valve
stem and valve guide and valve centering 191
Valve guide 192
Regrinding - Replacing the valve seats 192
Valve seats (4 cylinders engines) 193
Valve seats (6 cylinders engines) 194
Valve springs 196
FITTING CYLINDER HEAD 196
INSTALLATION OF COMPONENTS 197
REFITTING THE CYLINDER HEAD 205
Injectors assembly 207
Adjusting valve clearance 209
Engine completion 212
TIGHTENING TORQUES 213
SAfEty REgUlAtionS .217 MARCH 2007 N40 ENT M25
N60 ENT M37-M40
SECtion 
SAfEty REgUlAtionS
Page
SAFETY REGULATIONS 219
Standard safety regulations 219
Accident prevention 219
During maintenance 219
Respecting the Environment 220


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