Nanni 6.420TDI User manual

1
Notice de conduite
Instruction manual
Manuale d'istruzione
Betriebsanleitung
Instructieboek
Manuale de instrucciones
Instruksjonbok
Käyttöohje P/N 970 312 491

2
CONTENTS
1. SAFETY INFORMATION
2. GENERAL INFORMATION
3. ENGINE IDENTIFICATION
• Identification of main components
4. PREPARATION PRIOR TO RUNNING
5. ENGINE OPERATIONS
• Switching on
• Switching off
• Running in / Servicing under guarantee
• List of guarantee check operations
6. MAINTENANCE
• Draining engine oil
• Replacing oil filter
• Fuel filter replacement
• Nozzle holder replacement
• Flushing cooling system
• Replacing water pump
• Electrical/battery equipment
• Adjusting valve clearance
• Reverse reduction gear
• Recommendations
• Periodic Maintenance schedule
• Technical features
• Recommended onboard equipment
* All information and specifications contained in this
manual are based on the technical data in use at the
time of publication.
1 – SAFETY INFORMATION
This operating manual was compiled to help you get
the most out of your engine and its ancillary equip-
ment. It contains important instructions which should
be observed when the engine is running.
It is extremely important that it is read by the
user. It should be always kept in the same loca-
tion as the engine.
SAFETY SYMBOLS
These symbols are used to indicate that a danger
exists. They are aimed at drawing your attention to
components or operations that could be dangerous
for yourself or other persons using the engine.
Please read the recommendations they contain care-
fully. It is highly important that you read the safety
instructions and rules before running engine.
I
I I
I DANGER
Means that an extremely serious danger which could
result in death or major disability if the appropriate
specific measures are not taken.
I
I I
I WARNING
Means that a danger exists which could cause injury
or death if the appropriate specific measures are not
taken
I
I I
I CAUTION
Acts as a reminder that safety measures need to be
observed, or draws attention to dangerous actions
which could cause personal injury or damage to the
vessel or its components.
The user should take all necessary precautions in
terms of handling and protection and should seek
advice from a sector professional.
Non-respect of the safety instructions could lead to:
Bodily danger, a danger of environmental pollution
(dangerous substance leaks), danger to equipment
that could cause essential engine operation malfunc-
tions.
• FOLLOW ALL SAFETY RECOMMENDATIONS
- Comply with the engine's warning and caution stickers
- Remove the ignition key and close the battery cut-out
before working on the engine or itsancillary equipment
- Close the engine casing and replace all protective
parts before starting the engine
- Always kept the working area around the engine clean
and uncluttered
- Keep all inflammableliquids outside the engine com-
partment
- Never run the engine when under the influence of al-
cohol or medicines
• WEAR PROTECTIVE CLOTHING
- To avoid bodily injury, keep clear of rotating parts and
do not wear loose clothing near the engine when it is
running.
- Use safety clothing and equipment, protective goggles,
gloves, etc. in accordance withcircumstancesand
when they are required.
• FUELS AND LUBRICANTS
- Switch off the engine before re-fuelling or adding lubri-
cation products
- Do not smoke or use naked flame during re-fuelling
- Wear gloveswhen looking for a possible leak
- Hot oil can cause burns– let the engine cool before
checking the oil level, or changing the oil or oil filter car-
tridge
- Always use NANNI DIESEL recommended fuelsand
lubricants
ENGLISH
Operating and maintenance manual

3
EXHAUST FUME PRECAUTIONS
- Only run the engine away from people and animals
in a well ventilated area–a build-up of exhaust fumes
can be noxious
PRESSURE
- Never open the cooling system cap or oil filler cap
when the engine is running or while it is still hot. Re-
lease all pressure in the systems before removing the
caps
- Never check for possible pressure leaks with your
bare hands – wear gloves – leaks of liquids under
pressure can cause serious injuries – in the event of
injury due a liquid leak, see a doctor immediately
BATTERY
- An extremely explosive and volatile oxyhydrogen
gas mixture is created when the battery is being re-
charged. Never smoke, take a naked flame or cause
a spark near to the battery
- Never short circuit the battery terminals
- The electrolyte in the battery is highly corrosive –
wear gloves and safety goggles.
ELECTRICAL WIRING
- Disconnect the engine ignition and the battery cut-
out before working on the electrical equipment
- Check the condition of the electrical cables and wir-
ing – short circuits can create a fire hazard
DISPOSAL OF WASTE FLUIDS
- The various fluids used to operate the engine create
a health hazard. Make sure you read the instructions
shown on each product's packaging.
- Comply with the environmental regulations relating
to the disposal of old oil, fuel, cooling liquid, filters
and batteries.
2 –GENERAL INFORMATION
Your NANNI DIESEL engine has been carefully re-
searched and manufactured to the highest quality by
NANNI INDUSTRIES. It is built in accordance with
very precise specifications out of the very finest mate-
rials and following strict production procedures.
Your NANNI DIESEL engine is a reliable and long
term power unit for your vessel.
The installation of your engine in your vessel is highly
important in terms of correct power boating and envi-
ronmental protection.
NANNI INDUSTRY engineers are among the most
skilful in the sector. Their experience, knowledge
of the sea and mastery of techniques in associa-
tion with that of engineers from MAN, KUBOTA
and TOYOTA guarantees you the best there is in
terms of performance/reliability economy.
WARNING: It is imperative that you engine is in-
stalled in a Shipyard or by a representative of
NANNI INDUSTRIES, and in compliance with the
installation instructions.
This operating manual contains all the information
required for your engine to operate correctly.
Represented in more than 50 countries via its net-
work of agents and retailers, NANNI INDUSTRIES
guarantees your plain sailing World-wide. Parts, la-
bour or just advice, everything has been thought out
to serve you.
Do not hesitate to contact your nearest NANNI DIE-
SEL approved retailer .
We wish you calm seas and fair weather.
Please read this manual carefully before using your
engine.
Follow all safety recommendations.
I
I I
I WARNING: Correct operation of your marine en-
gine is dependent on a usage that conforms to the
engine's definition and its transmission (type of ves-
sel, speeds and operating conditions.)
3 – ENGINE IDENTIFICATION
It is imperative that the references shown on the
plates attached to the engine and reversing gear are
quoted in all correspondence, information requests
and orders for spare parts.
IMPORTANT: Make a note of the engine and trans-
mission serial numbers, and the model type, and
keep in a safe place
ENGINE TYPE
SERIAL NUMBER
SPECIFICATION

4
IDENTIFICATION DES PRINCIPAUX ORGANES
1. Heat exchanger
2. Cooling liquid filler hole
3. Block drain plug
4. Clear water pump
5. Sea water pump
6. Alternator
7. Flexible fastening
8. Electrical connector
9. Starter
10. Oil gauge
11. Oil filler hole
12. Air filter
13. Water injector exhaust elbow
14. Anode
15. Oil filter
16. Oil pressure transmitter
17. Reversing gearbox reduction gear
18. Injector pump
19. Electrical cut-out
20. Accelerator
21. Air cooler
22. Turbo
23. Exchanger drain
24. Thermostat
25. Turbo drain tap
26. Condensation drain hole
27. Battery minus (-) cable connector
28. Air re-heater relay
29. Diesel filter and water contamination detector air
30. Starter relay
31. Hydraulic oil tank (Stern drive version)
32. Power steering oil coolant (Stern drive version)
33. Neutral safety contact
34. Oil drain port
4 - PREPARATION PRIOR TO RUN-
NING
When the engine has been installed on board the
vessel and prior to removing the protective covers
over the various openings, clean the engine's sur-
faces. These operations should be carried out by a
Shipyard or an approved workshop.
GENERAL CHECKS.
See SILVERWAKE® guarantee conditions
- Fill engine and reversing gear with oil
- Fill the exchanger with coolant, degas the turbo vo-
lute casing at the highest point
- Check belt tensions
- Check that the various connectors and plugs are
tight (water and oil)
- Check electrical spade connectors, battery termi-
nals, cut-out and extension connectors are tight, plus
the battery electrolyte levels
- Accelerator control.
- Check that the “accelerator and reversing gear”
lever is correctly synchronised (imperative in the case
of a single cable level control.) You should have fin-
ished de-clutching we you start to accelerate. In the
event of electrical controls, refer to the specific con-
trols manual provided.
- Carry out a final check on fixing and a visual check
of the marine unit. If necessary, retouch the paint-
work on the unit and accessories.
I
I I
I DANGER :
•
••
• Never take a naked flame or cause a spark near to
the battery. An extremely explosive and volatile oxy-
hydrogen gas mixture is created when the battery is
being re-charged - Never cause a short circuit.
• Battery electrolyte is highly corrosive: if this acid
come into contact with the skin, wash immediately in
soapy water – in the event that it splashes into the
eyes, rinse abundantly with water and contact a doc-
tor immediately.
- When connecting the battery cable, start with the
positive terminal
- When disconnecting the battery cable, start with the
negative terminal
I
I I
I WARNING:
• Do not drop fuel or lubricants onto the engine
• The fluids used to operate the engine create are a
health hazard.
• Engine oil cold be harmful to the skin– wear gloves
NOTE: Modern diesel engines are high performance
units which require high quality fuels and lubricants.
ENGINE AND REVERSING GEARBOX LUBRI-
CATION
Engine
Oil pump greasing system, release valve pressure
regulation
Disposable oil filter cartridge
Transmission
See separate specifications
Engine oil levels
Unscrew the oil filler hole cap located on the
rocker cover. Check the oil level using the dip-
stick. Never fill beyond the maxi level.
NOTE: Oil types and quantities are given in the tech-
nical feature table
FUEL SYSTEM
Composition
Disposable main filter cartridge
Injector pump
High pressure injector pipe
Injectors (inside the cylinder head)
ENGLISH

5
Fuel system purge
- Check the fuel level in the tank.
- Open the fuel cock, unscrew the purge screw lo-
cated on the upper part of the filter and pump the sys-
tem using the incorporated pump. When no more air
bubbles appear, tighten the screw. In the event that
the injection system is not fully primed, carry out the
following procedure:
- Unscrew the No. 1 injector fuel pipe and turn the
engine on the starter until diesel fuel appears. Re-
tighten the nut and follow out the same procedure for
the other injectors.
- Re-start the engine and check for leaks.
I
I I
I DANGER : Do not smoke, approach with a naked
flame or cause a spark. Wipe up any spilt fuel.
COOLING SYSTEM
This is made up of two different systems: the sealed
cooling system and the sea water cooling system.
Sealed cooling system
This is made up of a pump driven by the crankshaft
via two V shaped belts, a water temperature heat
exchanger, an oil temperature heat exchanger inte-
grated unto the engine block and a thermostat.
Seawater cooling system
This is made up of a pump, a clear - salt water heat
exchanger, supercharger air refrigerant, power steer-
ing oil refrigerant (version Stern drive), reversing gear
oil exchanger and an exhaust elbow.
Coolant
Recommendations for initial start up.
- Check that the drain plug located beneath the turbo,
open the breather plug on the top of the turbo liner.
- Create a diluted 50% antifreeze and 50% clear wa-
ter antifreeze mixture. The quantity required is given
in the table of technical specifications.
- Pour the mixture into the filler hole, close the
breather plug on the top of the turbo liner when the
liquid can be seen and continue filling up to the maxi-
mum. Possible top-ups should be made when the
engine is cold and only with clear water. Re-start the
engine and top-up to correct level. Check for leaks.
- Every two years at the beginning of the season,
completely drain the cooling system, flush out using
clear water and re-fill in accordance with the instruc-
tions provided above,. (See SILVERWAKE guarantee
terms.)
I
I I
I DANGER : Always fill the cooling system when
the engine is off and cold – Do not smoke or ap-
proach with a naked flame.
- Keep away from revolving parts when the engine is
running
.
I
I I
I CAUTION : Never use undiluted antifreeze. The
use of additives and other type of coolant can cause
insulating deposits to be formed, and engine over-
heating.
Hot water connection
You can install an onboard hot water system by con-
necting from the interior clear water system to the
engine (Ask your NANNIDIESEL agent).
I
I I
I CAUTION: Before staring the engine, make sure
that the sea water inlet is open as it only needs the
pump to run dry for several seconds in order to cause
deterioration to the water pump rotor.
After cleaning the sea water filter, carefully close the
cover in order to avoid the water pump sucking in air.
ELECTRICAL EQUIPMENT
5. ENGINE OPERATION
RUNNING
I
I I
I DANGER : Make sure that the engine casing is
correctly closed and install all the protective
items before starting the engine.
- Check the fuel level
- Open the diesel supply tap
- Open the sea water inlet valve
- Check engine and transmission oil levels
- Check the coolant level
- Close the battery isolation switch
I
I I
I CAUTION: Turning the key to the contact position
when starting-up commences the process of pre-
heating inlet air to the engine which can continue
whilst running for approximately 6 minutes. Take
care not to let any part of the body come into contact
with the air pre-heating zone of the engine.
Inlet air pre-heating continues whilst the engine tem-
perature is less than 40°C.
Wiring positions /Color / Function
1 Red (+)12 volt battery
2 Violet D+ Alternator D+ Terminal
3 Grey Oil pressure sensor
4 Yellow Heating unit
5 Pink/Black Oil pressure switch
6 Yellow/Green Water temperature switch
7 Brown Starter
8 Orange/Blue Water temperature sensor
9 Green Water temperature indicator probe
10 Red/Yellow Engine stop solenoid power supply
11 Dark blue (-) engine speed indicator sensor
12 Dark blue (+) engine speed indicator sensor
13 Light blue Water contaminated diesel indicator
14 unused
15 Black (-) 12 volt battery
16 unused

6
- Check warning lights and other functions once the
engine has started.
- Stop the engine immediately if the alarm keeps ring-
ing, if the temperature rises abnormally, or if several
warning lights stay lit .
I
I I
I CAUTION : Discover and solve the problem be-
fore starting the engine!
Check that the seawater is running through the ex-
haust correctly.
Let the engine idle for 2 to 3 minutes, then subject it
to a load straightaway.
If the engine does not start at the first attempt, try
again making sure to switch off between each at-
tempt.
IMPORTANT:
In the event of several unsuccessful attempts at start-
ing the engine, look for the reason.
Do not keep on trying as water could be sucked into
the engine through the exhaust system!
I
I I
I WARNING: Never switch of the electrical system
using the battery cut-out whilst the engine is still run-
ning as this could cause damage to the alternator.
IMPORTANT: Do not let the engine idle unnecessar-
ily without load.
STOPPING THE ENGINE
- Move the lever to the idle/neutral position
- Let the engine idle for few seconds so that the tem-
peratures and turbo speed can stabilise.
- Never accelerate the engine before switching
off.
- Turn the key to the "O" position (vertical.)
- Switch of the battery isolation switch, close the sea
water inlet valve as well as the fuel supply.
IMPORTANT: In the event of the vessel being towed,
stop the engine and ensure that the seawater inlet
valve is close so that the engine does not accidentally
fill up with seawater.
TWIN ENGINE VESSELS:
In the event of running on only one engine, close the
sea water inlet of the stopped engine. Do not forget
to re-open it before re-starting the engine.
I
I I
I CAUTION : Check the engine and the engine
compartment for possible leaks.
RUNNING IN
SERVICING UNDER GUARANTEE
Running in
We recommend that for the first 20 hours of running
you treat your engine gently and only run it at maxi-
mum speed for very short periods.
Never race the engine immediately after starting with-
out having let it warm up first.
IMPORTANT : After running, the engine should not
be constantly run at its maximum speed but at 200
RPM below its maximum speed
.
Servicing under guarantee
All preventive maintenance operations as well as
their timescale are given in the: SILVERWAKE. ®
Guarantee Booklet
The guarantee is conditional on these servicing op-
erations. They must be carried out by an approved
NANNI DIESEL representative
All new engines are guarantee against all component
defects in accordance with the terms laid down in the
SILVERWAKE. ® Guarantee Booklet which is given
to the purchaser when the engine is delivered.
6. MAINTENANCE
I
I I
I DANGER: To avoid any bodily injury, let the en-
gine cool and close the battery isolation switch before
carrying out any work.
Observe safety and environmental protection recom-
mendations
IMPORTANT : These recommendations are vital.
Compliance will lengthen your engines operational
life and ensure that the conditions necessary for
meeting the normal guarantee terms are fulfilled.
Do not make any unapproved modifications to the
engine.
Damage caused by the use of unlisted or non ap-
proved spare parts is not covered under the terms of
the guarantee.
All interventions and maintenance work should be
carried out by an approved NANNI DIESEL workshop
If the engine is used for a number of hours that is
less than the indicators provided, maintenance
should be carried out once a year.
In this case, we recommend that maintenance work is
carried out before laying up for the winter, the engine
will then be protected by new, clean lubrication oil.
This does not obviate the wintering operations laid
down in the SILVERWAKE guarantee.
Valve clearance adjustment
This work should be carried out by a specialist work-
shop (calibrated adjustment shims)
Timescale: in accordance with the maintenance table
(see values in the table of technical features)
ENGLISH

7
Water pump rotor replacement
- Close the sea water inlet valve
- Remove the water pump cover
- Remove the worn rotor using adjustable pliers
- Clean remaining components.
- Install a new rotor
- Replace the water pump cover using a new seal.
- Open the sea water inlet valve
- Start the engine and check the system for leaks
Electrical equipment
Regularly check alternator belt tension. Tighten the
belt between the pulleys (190 Nm using the DENSO
checking instrument).
I
I I
I DANGER : Stop the engine and turn of the battery
isolation switch before doing any work on the electri-
cal system.
Battery
Battery components should be checked once per
season.
Electrolyte density should be between 1,270 and
1,285.
The electrolyte level should be regularly checked.
The level should be kept at 1cm above the plates.
Add distilled water only, if required.
I
I I
I DANGER : Never approach with a naked flame, or
check the battery by creating a "spark across the ter-
minals" because it gives off inflammable and explo-
sive gases - battery electrolyte is also highly corro-
sive.
If this acid come into contact with the skin, wash im-
mediately in soapy water. In the event that it
splashes into the eyes, rinse abundantly with water
and contact a doctor immediately. Do not create a
short circuit.
RECOMMENDATIONS
In order to ensure that the alternator an its incorpo-
rated regulator work perfectly, Never:
- Switch off the battery cut-out when the engine is
running (risk of damaging the regulator irrevocably).
- Reverse the battery terminals. The terminals are
marked + (positive) and – (negative) respectively;
the negative is the earth; the cable connectors and
the cables themselves should be attached correctly.
- Change the load on the circuit whilst the engine is
running.
To use several batteries, install a load proportioner.
(Ask a NANNIDIESEL representative).
In the event of starting using a back-up battery and
jump leads, carry out the following procedure:
Ignore the main battery circuit, link the backup battery
by connecting to + and - to -.
Once the engine is running, disconnect the jump
leads and do not switch off the main battery circuit.
You should disconnect the 2 battery cables when:
- you are using a battery charger
- before working on any electrical components
- before carrying out any welding on a steel hull
Flushing the cooling system
Clear water system
- Open the filler cap located on the exchanger
- Open the drain plug under the turbo liner
- Unscrew the cross headed screw connector located
on the exhaust manifold
- Remove the engine block drain plug located on the
thermostat mounting
- Drain the used liquid from the heat exchanger and
the engine block
- Fill the clear water system and run the engine for
several minutes
- Use the topping up/priming procedure described in
the Paragraph on: Sealed cooling system
- Drain the water and re-fill with an antifreeze/clear
water mixture
- Fill the cooling system in accordance with the
specifications
NOTE : In the event that the hot water system is con-
nected to the engine, drain this completely also and,
when refilling take the amount of added mixture into
account. Make sure that all air in the system is com-
pletely removed when filling .
I
I I
I WARNING: The liquid is under pressure. Do not
open the cap when the engine is hot. Allow the en-
gine to cool and open the cap carefully.
Sea water system
- Close the sea water inlet valve
- Drain all the sea water inlet piping, the filter, sea
water pump, piping, heat exchanger, by undoing their
jubilee clips
- Drain the exhaust system as a certain amount of
water will remain in the silencer "waterlock".
Cleaning the heat and air temperature
exchangers
- Check the exchanger wiring cores.
- Remove the covers.
- Remove the cores and clean them using water and
an commercially available none corrosive product.
Rinse well.
- Replace the O-rings and reinstall the sub assem-
blies.
I
I I
I WARNING: Corrosive products are hazardous to
health. Read all instructions on the packaging care-
fully.

8
Diesel fuel filter replacement
The diesel fuel filter is disposable, the fire retardant
envelope and the water contamination sensor should
be kept and replaces in their correct positions (the fire
retardant envelope should not be in contact with the
plastic purge screw.)
- Close the fuel cock
- Unscrew the cartridge from the filter head
- Coat the seal of the new cartridge with clean oil
- Screw the new cartridge onto the filter head and
hand tighten by ¾ of a turn (do not use a tool) replace
the sensor and the purge screw, check the seal
- Open the fuel cock
- Purge the system, check for leaks.
- Start the engine and check all is working correctly.
I
I I
I CAUTION: - Clean away any spilt fuel.
Observe environmental protection recommendations
Replacing an injector
(Use of the workshop manual is indispensable)
Remove:
- The 6 pipe injection harness
- The distribution cover
- Diesel backflow harness
- The complete injector. The seating and seal (SST
tool)
- Disassemble the injector
- Replace the complete injector, the O ring and the
seating. Replace all diesel backflow harness seals.
Tighten the injector and piping to the recommended
torque.
- Run the engine and check for fuel leaks.
- Do not try to re-condition an injector, this operation
should be carried out by a specialist workshop.
I
I I
I WARNING: Do not spray diesel onto your skin–
wear gloves .
IMPORTANT: the re-conditioning of injectors should
be done by an approved NANNI DIESEL workshop.
The injectors should be checked every 400 hours or
every 2 years in accordance with the maintenance
table and the SILVERWAKE® manual.
Draining the engine sump oil
- The oil is extracted using a pump and preferably a
warm engine.
- Pump the oil through the oil dipstick tube until all the
oil has been extracted.
- Refill using new oil. (See characteristics in the
specifications table)
- Check oil level with the dipstick.
- Never exceed the maximum level.
I
I I
I WARNING: Hot oil can cause burns – Avoid all
skin contact.
Comply with the environmental protection regulations
Oil filter replacement
The cartridge is disposable.
- Unscrew the cartridge from the filter head
- Coat the seal of the new cartridge with clean oil
- Screw the new cartridge onto the filter head and
hand tighten by ¾ of a turn (do not use a tool)
- Start the engine and check for leaks engine.
- Stop the engine, check the oil level and add oil if
required.
I
I I
I WARNING : Hot oil can cause burns – Avoid all
skin contact.
Comply with the environmental protection regulations.
Reversing gear
Refer to the detailed instructions in the reversing gear
manual enclosed with the operating manual.
Reversing gear mechanical control system
Regularly check the remote controls. The cable
travel should be 35mm from one side to the other of
neutral (O - A = O - B. The lever should be able to
freely travel to its full extent.
Electric control system
Check the connections on the solenoid valves, and
the connections on the control units.
Take note of the position of the levers
I
I I
I DANGER : To avoid bodily injury, to not run the
engine without an air filter.
ENGLISH

9
TYPE OF OPERATION
C/R/A
Check
Replace
Adjust
Every day At
20h Every 100 h
Every
200h
or every
year
Every
400 h
or every
2 years
Coolant level C/A XXX
Reversing gear oil level CXXX
Motor oil level CXXX
Control panel: indicators and alarms CXXX
Fan belt tension C/A/R XXX
Battery electrolyte level C/A
Control box: inspection of acc./inv. and trolling
cables: General lubrication C/A XX
Tighten bolts and jubilee clips C/A XX
General sealing C/A XX
Engine alignment suspended fixings. C/A XX
Heat exchanger adjusted cap RX
Coolant RX
Thermostat RX
Heat exchanger wiring loom: cleaning CX
Air heater: cleaning CX
Air cooling wiring loom: cleaning CX
Sea water filter: cleaning CDEPENDING ON CLEANLINESS
Fuel pre-filter: water purge C/A XXXXX
Fuel filter RXXX
Engine oil filter RXXX
Fuel pre-filter (cartridge) RXXX
Engine oil RXX
Reversing gear oil RXX
Water pump rotor RX
Injector adjustment C/A/R X
Valve clearance A500 H→
Cable gland (if braids are present) CXXX
Air filter, cleaning CX
Turbo: Inspection/Cleaning CX
Exhaust elbow anode C/R XXX
Air coolant: condensation outlet freeing X
Notched timing belt RX
EVERY 15 DAYS
MAINTENANCE
Periodical Maintenance Table

10
Technical Specifications
NANNI DIESEL ENGINE Z6.300 T6.300 6.420 TDI
Number of cylinders 6 in line
Max. power* 202.4 kW (275 hp) 224.4 kW (305 hp) 235,6 kW (320 hp)
Nominal operating conditions* 3600 rpm
Idling operating conditions 700 + - 25 rpm
Max. unloaded operating conditions 4200 rpm (+ - 50)
Cycle 4
Bore & stroke 94 x 100
Cylinder size 4.163 cm3
Distribution AC at head 24 belt valves
Compression ratio 15,7
Rotation direction Anti-clockwise (engine wheel view)
Injection order 1-4-2-6-3-5
Injection pump DENSO VE
Injection pressure 01 and 02 17.6 to 18.6 kPa and 13.2 to 14.2 kPa
Fuel consumption 216 g/kWh @ 3600 rpm
Injection feed (before TDC) 1.18 à 1.24 mm (comparator lift)
Dry weight 478 kg
Alternator 12 V - 80A
Battery capacity (min.) 100/110 A/h
Cooling circuit By clear water / sea water heat exchange
Sea water pump Neoprene rotor type
Coolant:
50% water + 50 % anti-freeze 27 Litres
Valve clearance (cold) In.0.20 (+ - 0.3) Out.0.50 (+ - 0.3)
Engine oil API CG 4 / SG – SAE 15 W 40
Engine oil capacity, depending on tilt 11,4 litres
Reversing gear ZF 63A oil capacity 3,5 L
Reversing gear ZF 80A oil capacity 5 L
Reversing gear ZF 80 IV oil capacity 7,5 L
Oil characteristics ATF DEXRON II, III
Recommended on-board equipment for engine type 6.420TDI T6 300 Z6 300
DESCRIPTION Quantity Reference
V-belt Set of 2 970 312 725
Engine oil filter 1 970 312 207
Fuel filter 1 970 311 185
Seawater pump rotor kit 1 970 312 432
Diesel return seals 1 970 312 701
Injector seat 1 970 312 695
Thermostat 1 970 311 046
Thermostat seal 1 970 312 796
Air inlet sleeve seal (‘O-ring’)
2 970 312 784
Air exchanger seal 4 970 312 781
Complete injector holder 1 970 312 692
Injector seal 1 970 312 694
Water / water exchanger seal 4 970 312 801
CAUTION: These specifications are designated for pleasure use only.
Recommended cruising speed: 200 rpm below maximum authorised speed.

11
2
4
5
1
23
6
7
7
8 9
10
13
15
16
17
18
28
34
21
24
27
29
3
30
33

12
10
11
13
2
22
12
31
32
29
14
25
15
20

13
ENGINE CONTROL PANEL : SIZE AND CUT OFF FIGURE

14
ELECTRICAL SYSTEMS WIRING DIAGRAMS 6.420 TDI, T6 300, Z6 300

15

16
Nanni Industries S.A.S. 11, Avenue Mariotte - Zone Industrielle BP 107-
33260 La Teste France - Tel : + 33 (0)5 56 22 30 60 - Fax : [phone]
E-mail : co[email protected]
Certifié ISO
9001 : 2000