IVECO N67-MNS-M22 N67-MNT-M28 Service Manual pages

IVECO N67-MNS-M22 N67-MNT-M28 Service Manual pages
NEF Engine
N67 MNS M22
N67 MNT M28
Technical and Repair
Manual
T E C H N O L O G I C A L
E X C E L L E N C E
NOVEMBER 2006 EDITION
1.
N67 MNS M22
N67 MNT M28
NOVEMBER 2006
In particular
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We strongly recommend that you carefully read the indications contained in this document: compliance with them
protects the engine against irregular operation and assures
its reliability, safeguarding sea-going and maintenance personnel against accident hazards.
The indications contained in this document pertain to the
N67 MNS M22.10 or N67 MNS M22.11, N67 MNT M28.10
or N67 MNT M28.11 marine engine and complement the
IVECO MOTORS-FPT 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-FPT is available beforehand to examine
requirements for special installations, if any.
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FOREWORD
o Use of unsuitable fuels and oils may compromise the
engine’s regular operation, reducing its performance,
reliability and working life;
o Exclusive use of IVECO Original Parts is a necessary
condition to maintain the engine in its original integrity;
o 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 characteristics that are current as of the publication date.
IVECO MOTORS-FPT 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-FPT
Technical Assistance Network is always at the Customer’s
side with its competence and professionalism.
Publication IVECO MOTORS-FPT edited by:
IVECO PowerTrain
Advertising & Promotion
Pregnana Milanese (MI)
www.ivecomotors.com
Printed P3D32N002 E - November 2006 Edition
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SECTION CONTENTS
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N67 MNS M22
N67 MNT M28
NOVEMBER 2006
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Section
1.
Page
OVERVIEW 2.
TECHNICAL DATA 3.
ELECTRICAL EQUIPMENT
4.
DIAGNOSTICS 87
5.
MAINTENANCE 97
6.
SERVICING OPERATIONS
ON INSTALLED ENGINE
103
7.
TOOLS 115
8.
OVERHAUL 123
9.
SAFETY REGULATIONS 181
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1.
5
37
43
Indications for consultation
Sections 1-2-3 are intended for sales personnel, to provide
them with exact knowledge of the product’s characteristics 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 diagnosing, they will also be able to provide an effective technical
assistance service.
N67 MNS M22
N67 MNT M28
OVERHAUL
NOVEMBER 2006
8.123
SECTION 8
OVERHAUL
Page
Graph and symbols
125
GENERAL SPECIFICATIONS
126
CLEARANCE DATA
127
ENGINE OVERHAUL - ENGINE
REMOVAL AT THE BENCH
133
Preface
133
Engine setting operations for
the assembly on turning stand
133
Components removal
134
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CYLINDER UNIT
140
Checks and measurements
142
Checking head supporting surface on cylinder unit 142
TIMING SYSTEM
143
Checking cam lift and pin alignment
143
Bushes
143
Bush replacement
144
Tappets 144
Fitting tappets - camshaft
145
OUTPUT SHAFT
146
Measuring journals and crankpins
146
Replacing oil pump control gear
149
Fitting main bearings
149
Finding journal clearance
149
Checking crankshaft shoulder clearance
150
CONNECTING ROD - PISTON ASSEMBLY
151
Measuring piston diameter
152
Piston pins
152
Conditions for proper pin-piston coupling
152
Split rings
152
(continues on next page)
8.124
N67 MNS M22
N67 MNT M28
OVERHAUL
153
Bushes
154
Checking connecting rods
154
Checking torsion
154
Checking bending
155
Fitting connecting rod-piston assembly Connecting rod piston coupling
155
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Connecting rods
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Fitting split rings
Checking piston protrusion
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Finding crankpin clearance
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Fitting connecting rod-piston
assembly into cylinder barrels
CYLINDER HEAD
156
157
158
159
Removing the valves
159
Checking cylinder head wet seal
160
Checking cylinder head supporting surface
160
VALVES
161
Removing carbon deposits,
checking and grinding valves
161
Checking clearance between valve
stem and valve guide and valve centering
161
Valve guide
162
Regrinding - Replacing the valve seats
162
Valve springs
163
FITTING CYLINDER HEAD
163
INSTALLATION OF COMPONENTS
164
Refitting the cylinder head
172
Adjusting valve clearance
174
Adjusting injection pump phase
177
Completion of the engine
177
TIGHTENING TORQUES
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NOVEMBER 2006
178
N67 MNS M22
N67 MNT M28
OVERHAUL
NOVEMBER 2006
8.133
ENGINE OVERHAUL - ENGINE REMOVAL AT THE BENCH
Preface
Figure 2
Part of the operations illustrated within this section can be
partially executed while the engine is assembled on the boat,
depending on the room available for access to the engine
and on the equipment application as well.
CAUTION
All operations of engine disassembly operations as well as
overhaul operations must be executed by qualified engineers provided with the specific tooling and equipment
required.
Operations described below refer to the engine without the
components for its marine adaptation (see Section 6).
1
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o Assemble the bracket bearing 99361037 using the four
screw threaded ports (1).
Engine setting operations for the assembly on
turning stand
On the left hand side:
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The following operations are relating to the 4 cylinder engine
but are similar and applicable for the 6 cylinder.
o Remove the oil dipstick together with guide pipe (2);
(loosen the guide pipe disassembling from the block);
properly pipe the screw-threaded port to avoid inlet of
foreign matters.
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Figure 1
o Remove the hose between sea water pump and heat
exchanger;
2
1
1
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76145
On the right hand side:
o Disassemble the starter; properly hold the starter (1)
and loosen the fixing screws (2);
o Assemble the second bracket 99361037 throughout the
screw-threaded ports (1);
o Disassemble oil filter.
o Lift the engine using the rocker arm 99360595 and put
it on the turning stand 99322205;
CAUTION
The oil filter contains inside approx. 1 kg of engine oil. Provide tank with enough capacity to contain the liquid.
Avoid contact of engine oil with the skin: in case of skin
contamination rinse in running water.
Engine oil is highly pollutant: provide for disposal in compliance with the law and regulations in force.
o Drain the oil through the cap underneath the plug.
CAUTION
Avoid contact of engine oil with the skin: in case of skin
contamination rinse in running water.
Engine oil is highly pollutant: provide for disposal in compliance with the law and regulations in force.
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