Westerbeke 12C- TWO Operator's Manual page 20

'FUEL SYSTEM
DIESEL FUEL
USE A DIESEL FUEL WITH A CETANE RATING OF #45 OR HIGHER.
(No. 2-D (SAE J313) diesel fuel according to AStM D975}.
FUEL FItTERS
The fuel injection pump and the fuel injectors are precisely
manufactnred 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 watef separating type must be
installed between the fuel tank and the engine to remove
water and other contami)lants from the fuel before they can
be, carried to the fuel 'system on the engine. .
The owner/operator is responsible for maldng certain the
fuel reaching the engine's injection equipment is free of
impurities. This process is accomplished hy installing and
maintaining a proper fuel between the
fuel tank
and
the gerierator/engine. 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 1bread. When retainer contacts the
"0" ring, tighten 1/4 - 112 turns by hand. Open the fuel,
ID!PPlY
and run the engine to inspect for leaks.
LIGHTLY WIPE
WITH CLEAN FUEL
WHEN INSTALLING
THE NEW FUEL
FILTER CARTRIDGE
FUEL
LIFT PUMP
TYPICAL
FUEL '
FILTER
(OWNER IIlSTALLED)
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). '
INLET FUEL
FILTER
FUEL LIFT PUMP
THE'D-RiNG
n
M"""
'it
ONLY NEEDS TO
,. REPLACfD IFfT
SIGNS OF AGING.
FRESH FUEL
Periodically check the fuel connections to and out me 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 sholjld be clean and. well secUred by
the_mounting boltto ensure proper pump o'petation. " '
When energized thrn the preheat circuit, the;fuellift pump will
purge air from the fuel system and provide a continuotis flow
of fuel as the engine is running.
INLET FUEL FILTER
,,1' 0 ,nsure,cleanfuel-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. .
"IIY'
WESTERBEKE
~,?gines
& Generators
14