Iveco Motors N67 MNT M28 Betriebsanleitung
NEF ENGINE
N67 MNT M28
TECHNICAL AND REPAIR
MANUAL
OCTOBER 2005 EDITION
TECHNOLOGICAL EXCELLENCE
N67 MNT M28
1.2 OCTOBER 2005
FOREWORD
We strongly recommend that you carefully read the indi-
cations contained in this document: compliance with them
protects the engine against irregular operation and assures
its reliability, safeguarding sea-going and maintenance person-
nel against accident hazards.
The indications contained in this document pertain to the
N67 MNT M28 marine engine and complement the IVECO
MOTORS publication of “Marine Diesel Engines Installation
Handbook” that the reader should refer to for anything that
is not explained herein.
Technical engineers and fitters are required to comply with
safety regulations on work. They have to implement and
adopt the device required for individual personal safeguard
while carrying out maintenance or checks.
Safety rules are reported in Section 9 of this publication.
Regulations on handling engine are reported at the end of
Section 6 of this publication.
In order to start the engine, strictly follow the procedure
stated at the end of Section 5 of this publication.
To get the best possible performance out of the engine, it
is mandatory to conform with its intended mission profile.
The engine must not be used for purposes other than those
stated by the manufacturer.
IVECO MOTORS is available beforehand to examine requi-
rements for special installations, if any.
In particular
q Use of unsuitable fuels and oils may compromise the
engine’s regular operation, reducing its performance,
reliability and working life;
q Exclusive use of IVECO Original Parts is a necessary
condition to maintain the engine in its original integrity;
q Any tampering, modifications, or use of non-original
parts may jeopardize the safety of service personnel and
boat users.
To obtain spare parts, you must indicate:
- Commercial code, serial number and indications shown
on the engine tag;
- Part number of the spare as per spare part catalog.
The information provided below refer to engine characteri-
stics that are current as of the publication date.
IVECO MOTORS reserves the right to make modifications
at any time and without advance notice, to meet technical or
commercial requirements or to comply with local legal and
regulatory requirements.
We refuse all liability
for any errors and omissions.
The reader is reminded that the IVECO MOTORS Technical
Assistance Network is always at the Customer’s side with its
competence and professionalism.
Publication IVECO MOTORS edited by:
IVECO PowerTrain
Advertising & Promotion
Pregnana Milanese (MI)
www.ivecomotors.com
Printed P3D32N002 E - October 2005 Edition
N67 MNT M28 1.3
OCTOBER 2005
SECTION CONTENTS
Section Page
1. OVERVIEW 5
2. TECHNICAL DATA 31
3. ELECTRICAL EQUIPMENT 37
4. DIAGNOSTICS 53
5. MAINTENANCE 63
6. SERVICING OPERATIONS
ON INSTALLED ENGINE 69
7. TOOLS 81
8. OVERHAUL 89
9. SAFETY REGULATIONS 147
Indications for consultation
Sections 1-2-3 are intended for sales personnel, to provide
them with exact knowledge of the product’s characteri-
stics 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 diagno-
sing, they will also be able to provide an effective technical
assistance service.
N67 MNT M28
1.4 OCTOBER 2005
N67 MNT M28OVERVIEW 1.5
OCTOBER 2005
SECTION 1
OVERVIEW
Page
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 parts 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
N67 MNT M28 OVERVIEW
1.6 OCTOBER 2005
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 29
N67 MNT M28OVERVIEW 1.7
OCTOBER 2005
IDENTIFYING DATA
Viale dell'Industria, 15/17 - 20010 Pregnana Mil.se MI - ITALY
ENGINE TYPE
ENGINE DWG
ENGINE S/N
COMMERC. TYPE / VERSION
POWER SET CODE
HOMOLOGATION N°
ENGINE FAMILY
POWER (KW)
AND SPEED (RPM)
YEAR OF BUILD
S. p. A.
04_002_N
Figure 1
Figure 2
The engine identification data are stenciled on a tag located on a side of the engine coolant tank.
04_306_N
N67 MNT M28 OVERVIEW
1.8 OCTOBER 2005
COMMERCIAL CODE
The purpose of the commercial code is to make the characteristics of the product easier to understand, categorizing the engi-
nes 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 M N T M 28 . 1 0
ENGINE FAMILY IDENTIFIER: N = NEF
DISPLACEMENT: 67 = 6700 cc NOMINAL
FUEL SUPPLY: M = MECHANICAL INJECTION PUMP
BASE: N = NON STRUCTURAL
AIR INTAKE: T = INTERCOOLED SUPERCHARGED
APPLICATION: M = MARINE
MAXIMUM PERFORMANCE LEVEL ACHIEVABLE
28 = 280 HP
VERSION:
TURBOCHARGED:
1 = COOLED
2 = NOT COOLED
VERSION
N67 MNT M28OVERVIEW 1.9
OCTOBER 2005
PRODUCT MODEL NUMBER
The model number is assigned by the manufacturer; it is used to identify the main characteristics of the engine, and to characte-
rize its application and power output level. It is stamped on a side of crank-case, close to oil filter.
F 4 G E 0 6 8 6 A *E 6 0 1
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 280 HP
E = EMISSION FOR
MARINE APPLICATION
VARIANTS TO
BASIC ENGINE
N67 MNT M28 OVERVIEW
1.10 OCTOBER 2005
ENGINE PARTS AND COMPONENTS
Figure 3
1. Engine coolant discharge cap - 2. Electric starter motor - 3. Tube bundle engine coolant / sea-water heat exchanger - 4.-Location
of sacrificial anode - 5. Cooled exhaust manifold - 6. Exhaust gas and sea-water discharge pipeline - 7. Lifting eyebolt - 8. Rocker arm
covers - 9. Oil refill cap - 10. Location of thermostatic valve - 11. Cap for engine coolant outlet to sanitary water heating system
- 12. Coolant refill cap - 13. Fuel intake fitting - 14. Fuel filter - 15. Engine coolant tank - 16.-Auxiliary belt automatic tensioner -
17. Alternator - 18. Cap for engine coolant discharge and recirculation from sanitary water heating system - 19. Oil filter.
19
2
3
4
5
69
8
17 16
1
04_303_N
7
10 11 1312
15
14
18
Inhaltsverzeichnis
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