Fuel system
72
Filtration
Three progressive stages – separation, coagulation
and filtration ensure that fuel arrives at the engine
free from contamination. Water and other impurities
are collected in the bowls beneath, from where they
can be simply drain off by means of a drain valve.
Recommended filter insert 0 micron to have an even
change interval between engine mounted filter and
the pre filter.
The double filter has a pressure gauge showing the
pressure drop. The flow can be directed through left-
hand, right-hand or both filters, thus making it possi-
ble to change filter elements with the engine running.
The filter thereby complies with Classification Asso-
ciation standards for propulsion engine fuel systems.
NOTE! When fuel pre filters are used together with a
fuel shut-off valve (), the non-return valve (2) in the
fuel pre filter must be removed if fitted. See figure.
If this is not done, the stop fuction will not work be-
cause there will not be sufficient negative pressure in
the injection pump.
Fuel pre-filters
Single or double filters
The filter shall be installed on the suction side of the
feed pump, between the feed pump and the fuel tank,
and should be located at a height between the base
of the fuel tank and the feed pump, to reduce the re-
sistance in the supply pipe.
Install the filter vertically on a bulkhead or bracket-
ing, where it is not affected by engine vibration and
in such a manner that it is protected as much as pos-
sible from fire in the engine room. The location should
also facilitate inspections and insert replacement.
IMPORTANT! Always select a fuel filter for the
correct fuel flow quantity. D5/D7 has a high fuel
flow quantity.
NOTE! Free space is required above the filter lid to
permit the insert to be changed, min. 30 mm (5") up
to 260 mm (0") depending on type of filter.
Classified installations and sometimes local authori-
ties demand fire resistant material in the fuel filters.
Sightglass made of glass or plastic might not be ap-
proved.
Summary of Contents for D11 series
Page 1: ...Marine Propulsion Diesel Engines Installation 1 1 D E D5 D16 series ...
Page 2: ......
Page 208: ...206 References to Service Bulletins Group No Date Concerns ...
Page 209: ...207 Notes ...
Page 210: ...208 Notes ...
Page 212: ...7748655 English 11 2007 ...