Maintenance
Protecting the engine during periods of inactivity
27
A set of operations will protect the engine during long pe-
riods of non-use.
We recommend that you have these
winterization operations carried out by a Nanni Diesel
authorised workshop.
During short periods of inactivity, carry out the following op-
erations:
• Check all the electrical contacts and protect them with
an anti-oxidant spray if necessary.
• Check the electrolyte level and that the battery is
charged.
• Take the engine to its operating temperature (70-80°C)
at least once a month.
For long periods of inactivity, carry out the operations be-
low. This treatment is effective for 6 months. If the period of
inactivity is extended, repeat this treatment.
1. Drain the engine and gearbox oil, change the oil
fi
lter
and
fi
ll with new oil. Drain and replace the coolant.
2. Drain the fuel pre
fi
lter and replace the cartridge (if
equipped).
3. Change the fuel
fi
lter and drain the fuel circuit with
storage fuel.
4. Inspect the air
fi
lter. Change it if necessary.
5. Check that the injection pump rack moves freely (if
equipped).
6. Inspect the control cables (make sure the engine is at
idle and the gearbox in neutral).
7. Remove all the mechanical parts and the ancillary
applications that could be damaged during the no-
load operation of the engine.
8. Inspect the belts. Replace it if necessary.
9. Start the engine and let it operate few minutes with-
out load.
10. Run the engine at 1500-1800 rpm for 15 minutes until
the operating temperature (70-80°C) is reached.
11. Stop the engine and remove the start key from the
panel.
12. Let the engine cool down to avoid the risk of burns.
13. Block all the openings (admission, exhaust, fuel line,
air valve).
14. Loosen belts.
15. Remove and store the impeller of the sea water pump
in a hermetic opaque container. Indicate clearly with
a note on the engine «IMPELLER OF RAW WATER
PUMP MISSING».
16. Remove the battery.
17. Spray an anti-damp spray on the engine and the
electric parts (starter, alternator, wire harness con-
nectors and panel).
18. Clean the hold and Install a dehumidi
fi
er.
19. Grease the control cables (if equipped)
Restarting the engine
After a period of inactivity, carry out the following opera-
tions before restarting the engine:
• Check that the battery is charged and the level of the
liquid. Check that the electrical contacts are intact and
working correctly.
• Check the oil level. If necessary
fi
ll the oil tank or drain
the oil according to the intervals given in the Silverwake
booklet.
• Replace the oil
fi
lter
• Check the coolant level. Fill with coolant if necessary
or drain the coolant according to the intervals given in
the Silverwake booklet.
• Replace the fuel
fi
lter according to the intervals given
in the Silverwake booklet.
• Replace the air
fi
lter according to the intervals given in
the Silverwake booklet.
• Re-tighten the belt.
• Check the tightness of the connections.
• Check the integrity of the impeller of the seawater
pump and put it back into the pump.
• Remove the exterior protection treatment and all the
covers.
• Start the engine and if no defaults appear, let it run for
few minutes without load.
• Stop the engine and check the engine oil and coolant
levels. Check for leakage.
Prolonged storage
For prolonged storage before or after being used for the
fi
rst time, a speci
fi
c set of measures should be adopted.
Contact your Nanni Diesel authorised engineer.
