Replacing The Fuel Filter; Replacement Of An Injector; Draining Of Engine Crank Case Oil - Nanni T4.155 Workshop Manual

Seawater circuit
- Close the seawater intake valve.
- Drain all seawater intake pipes, the filter, the seawater pump, the temperature exchanger and pipe by
loosening the attachment collars.
- Drain the exhaust circuit, as a certain quantity of water remains in the bottom of the "water lock" exhaust
silencer.
Clean the oil reverser and fuel, air, water temperature exchanger (if fitted).
Check the exchanger cores.
- Remove the covers.
- Remove the cores (except fuel exchanger), clean them with water and a non-corrosive commercially
available product. Generously rinse.
- Replace o-rings and reinstall sub-assemblies
WARNING: Corrosive products are a potential danger for health. Carefully read the instructions on product
packaging.

Replacing the fuel filter

The fuel filter is of the disposable type.
- Close the fuel valve.
- Coat the sealed new cartridge with clean oil
- Screw the new cartridge to the filter head, then tighten by hand ¾ of a turn (do not use tooling).
- Open the fuel valve.
- Bleed the circuit.
- Start the engine and check sealing.
CAUTION: Always wipe up spilled fuel.
Observe the environment protection instructions.

Replacement of an injector

Remove:
- The injection pipe bar assembly
- The fuel return bar assembly
- The complete injector.
- Disassemble the injector.
- Replace the gasket and the injector nozzle.
- Check the calibration of the injector and atomization. Reinstall the components.
WARNING: Never spray fuel onto the skin. Wear gloves.
IMPORTANT: These works must be carried out by a NANNI DIESEL approved workshop. Injectors must be checked
every 400 hours or every 2 years, according to the maintenance table and the SILVERWAKE® logbook.

Draining of engine crank case oil

The oil is extracted by a drain pump preferably with the engine warm.
- Pump until all the oil is extracted.
- Top up with fresh oil.
- Using the gauge, check that the level never exceeds the maximum level.
WARNING: Hot oil can burn. Avoid any contact with the skin.
Observe environment protection rules.
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