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Westerbeke 20B TWO Instalační manuál Strana 20

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FUEL
SYSTEM
DIESEL
FUEL
USE
A
DIESEL
FUEL
WITH
A
CETANE
RATING
OF
#45
OR
HIGHER.
(No.
2-0
(SAE
J313)
diesel
fuel
according
to
ASTM
0975).
FUEL
FILTERS
The fuel injection pump and the fuel injectors are precisely
manufactured and they must receive clean diesel fuel, free
from water and dirt.
To
ensure this flow
of
clean fuel, the fuel
must pass through at least two fuel filters, a fuel water
separator and the engine's spin-on fuel filter. Visually inspect,
clean, and change these filters according to the maintenance
schedule
in
this manual.
FUEL
WATER
SEPARATOR
A primary fuel filter
of
the water separating type must be
installed between the fuel tank and the engine to remove
water and other contaminants from the fuel before they can
be
carried to the fuel system on the engine.
The owner/operator is responsible for making certain the
fuel reaching the engine's injection equipment is free
of
impurities. This process is accomplished by installing and
maintaining a proper fuel filter/water separator between the
fuel
tank
and the generator/engine. Westerbeke recommends a
10 micron (no finer) filter
be
used .
ENGINE
FUEL
FILTER
Periodically check the fuel connections and the bowl for
leakage. Replace the filter element after the first
50 hours
then follow the
MAINTENANCE SCHEDULE.
Changing/cleaning
the
filter
element
1.
Shut off the fuel supply.
2.
Unscrew the retainer ring that holds the filter bowl to the
housing and allow the bowl to coine away from the
housing,
3. Remove and replace the filter element and clean the bowl.
4. Replace the sealing
"0"
ring and reassemble the bowl
to the housing. Thread the retainer ring on carefully
so as
not
to
cross thread.
When
retainer contacts the
"0"
ring, tighten
114
-
112
turns
by
hand. Open the fuel
gum!y and run the engine to inspect for leaks.
LIGHTLY
WIPE
WITH
CLEAN
FUEL
WHEN
INSTALLING
THE
NEW
FUEL
FILTER
CARTRIDGE
.
-IJ'i
I
FUEL
LIFT
PUMP
TYPICAL
FUEL
FILTER
(OWNER
INSTALLED)
The fuel injection pump is the most important component
of
the diesel engine, requiring the utmost caution in handling.
The fuel injection pump has been thoroughly bench-tested
and the owner/operator is cautioned not to attempt to service
it.
If
it requires servicing, remove it and take it to an
authorized fuel injection pump service facility.
Do
not
attempt to disassembly and repair it.
The only adjustment the servicing mechanic should make to
the fuel injection pump is the adjustment for the engine idle
speed (see
IDLE SPEED ADJUSTMENT under ENGINE
ADJUSTMENTS).
14
INLET
FUEL·
FILTER
FUEL
LIFT
PUMP
THE
0-RING
GASKET~~W:
ONLY
NEEDS
TO
BE
REPLACED
IF
IT
SIGNS
OF
AGING.
Periodically check the fuel connections to and out
of
the pump
and make sure that no leakage is present and that the fittings
are tight and secure. The
DC
ground connection at one
of
the
pump's mounting bolts should be clean and well secured by
the mounting bolt to ensure proper pump operation.
When energized
thru the preheat circuit, the fuel lift pump will
purge
air from the fuel system and provide· a continuous flow
of
fuel as the engine is running.
INLET
FUEL
FILTER
To
ensure clean fuel into the fuel pump, there is a small in-
line fuel filter connected to the fuel lift pump elbow. This
filter should
be
replaced every 250 hours
of
operation or
once a season, which ever occurs first.
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