Nanni 4.390 TDI User Manual - page 20
User Manual
Page 22 sur 28
Seawater filter (clean if necessary)
Close the seawater intake valve (if equipped)
before cleaning the seawater filter.
With the engine stopped, visually inspect the seawater
filter
35
. Check that it is not obstructed by any mineral
or organic deposit. If necessary, dismantle the filter in
order to clean it.
Remove the cover. Remove the filter. Clean the housing
of any debris which it may contain. Rinse the filter and
housing with fresh water. Check the condition of the
seal (tightness). Reassemble and check, with engine
running, for leaks and/or air in the circuit.
Coolant level (page A-4)
Do not remove the plug from the heat exchanger
reservoir when the engine is hot. If the coolant is
pressurized, it can gush out and cause serious burns.
Perform these checks with the engine stopped.
Turn the filler plug
30
up to its first stop to allow the
pressure in the system to escape before removing the
plug. Inspect the fluid level. The level should be
between the lower edge of the filler neck and the level
pin (if equipped), respectively representing the
minimum and maximum level in the expansion
chamber. Top up if necessary using a fluid comprising
50% water and 50% antifreeze. The engine has another
filling port
31
. Top up with coolant in the same way as
this port.
When filling the cooling system, the coolant level
must be checked after 10 minutes of use since the
system purges itself automatically. Top up if necessary.
General tightness
Regularly perform a visual inspection of the engine and
its compartment before starting it up and after using it.
This check will allow you to quickly identify any
tightness faults.
Be especially careful with respect to operating fluid
leaks: oil, fuel and coolant. Inspect the attaching parts
(if loose, perform any necessary tightening), and inspect
the couplings and hoses.
Accumulated fuel, oil or grease residues on the
engine and in the engine compartment can represent a
source of fire. Clean these as quickly as possible.
Do not throw these waste products into the
sea; this cleaning operation should be performed in an
appropriate port area.
Stuffing box (if braided type)
If your boat is equipped with a braided-type stuffing
box, check the system's tightness.
This system is not perfectly tight, so it is perfectly
normal that you observe a slight amount of water
coming in. Correct operation is characterized by a drop-
by-drop water intake. If the water comes in as a small
run, this means the water intake is too great and you
should contact your NANNI INDUSTRIES-approved
dealer.
Check of electrolyte level
Never bring a flame near to the battery or check
the battery using a "spark" since the gases are
flammable and explosive. The battery electrolyte is
highly corrosive. If the acid comes into contact with
your skin, wash your skin immediately with soapy
water. If projected into the eyes rinse thoroughly with
water and immediately contact a doctor.
Do not short-circuit the battery.
-The electrolyte density must be between 1.270 and
1.285 (measure taken using a hydrometer).
-The electrolyte level should be checked periodically.
The level should be maintained at 1 cm above the plates.
Only add distilled water, if necessary.
Cleaning
The batteries must remain clean and dry. Oxidation or
dirt on the battery or battery terminals 6 can result in
short-circuits,
voltage
drops
and
discharging,
particularly in humid weather. Clean the battery
terminals and the cables using a brass brush to remove
any oxidation. Carefully tighten the cable terminals and
lubricate them with appropriate grease.
RECOMMENDATIONS
To ensure perfect operation of the alternator and built-in
regulator, Never :
-Switch off the main battery switch of the circuit with
the engine running (this can result in destruction of the
regulator).
-Reverse the battery terminals. The terminals are
respectively marked + (positive) and – (negative); the
negative terminal is connected to ground. The cable
terminations and the cables must be correctly secured.
-Disconnect the battery.
To use several batteries, install a load distributor
(contact a NANNIDIESEL representative).