Volvo Penta D3-130A Operator's Manual page 61

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Cleaning seawater filter
WARNING! Risk for water penetration.
IMPORTANT! If the boat is used in water that has
a lot of contaminants, seaweed etc. the filter must
be checked more frequently than indicated in the
maintenance schedule. Otherwise there is a risk
the filter will clog and the engine will overheat.
Seawater filter
To avoid spillage when cleaning the seawater filter the
engine has to cool for at least 15 minutes after driving
since the seawater system is pressurized.
1. Screw the cover a full turn anti-clock wise and wait
another 10 seconds.
2. Screw the cover off entirely.
3. Lift out and clean the inset.
Seawater filter, optional extra
1. Screw off the cover (1).
2. Remove the seal plate (2).
3. Lift out and clean the inset (3).
Vacuum valve. Cleaning
Some engines have a vacuum valve installed in the
seawater piping.
WARNING! Risk for water penetration. Close the
sea cock.
For the vacuum valve to work satisfactorily, it must be
taken to pieces twice a season, or when leakage occurs.
Remove the entire valve from the bulkhead where it is
installed.
Undo the lid of the valve, remove the gasket and
diaphragm and remove any deposits. If the diaphragm
is distorted, put a new one in.
Installation must always be done with the valve
upside down. Put the diaphragm in the lid. Make sure
that the entire diaphragm rests where it should. The
diaphragm must not be pinched by the gasket. Put the
gasket on and screw the lid on. Note! Tightening torque
(2 Nm). If the lid is tightened too much, the valve stops
working.
Maintenance: Seawater system
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