Fuel System; Fuel Lift Pump; Fuel Filters; Fuel Water Separator - Westerbeke 44A FOUR-35 C THREE Operator's Manual

FUEL SYSTEM
DIESEL FUEL
Use No.2 diesel fuel with a cetane rating of 45 or higher. Do
not use kerosene or home heating fuel.
FUEL FILTER/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.
Most installers include a fuel filter/water separator with the
installation package as they are aware of the problems that
contaminants in the fuel can cause.
A typical fuel filter/water separator is illustrated below. This
is the Raycor Model 500 MA. Keep in mind that if a water
separator type filter is not installed between the fuel supply
tank and engine-mounted fuel system, any water in the fuel
will affect the fuel pump, engine filter, and injection equip-
ment. 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.
FUEL FILTER
WATER SEPERATOR
~ ~ ~'
FUEL
I~~~ION
PUMP
~ .:~:~
The fuel injection pump is a very important component of
the diesel engine, requiring the utmost care 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 disassem-
ble and repair it.
The only adjustment the servicing mechanic should make to
the fuel injection pump is the adjustment for engine idle
speed (see
IDLE SPEED ADJUSTMENT
under
ENGINE
ADJUSTMENTS).
FUEL LIFT PUMP
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 opera-
tions.
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.
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 filter/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.
A
WARNING:
Shut off the fuel valve at the tank
when servicing the fuel system. Take care in catching
any fuel that mlY spill. DO NOT allow any smoking,
open flames
or
other sources of fire near the fuel sys-
tem when servicing. Ensure proper ventilation exists
when servicing the fuel system.
I
BOWL
I
ENGINE, FUEL FILTER
Periodically check the fuel connections and the bowl for
leakage. Clean the filter element with kerosene or diesel fuel
after the first 50 hours then follow the
MAINTENANCE
SCHEDULE
for cleaning and replacement.
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 come 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 - 1/2 turns by hand. Open the fuel supply and
run the engine to inspect for leaks.
Engines
&
Generators
19
FUEL
FILTER