Fuel System; Fuel Filters; Fuel Water Separator; Fuel Injection Pump Control - Westerbeke 55A FOUR Operator's Manual

FUEL SYSTEM
A
WARNING:
Shut off the fuel valve at the tank
when servicing the fuel system. Take care in
catching any fuel that may spill. DO NOT allow any
smoking, open flames
or
other sources
of
fire near
the fuel system when servicing. Ensure proper venti-
lation exists when servicing the fuel system.
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 engines spin-on fuel
filter. Visually inspect, clean, and change these filters
according to the maintenance schedule in this manual.
O-RING----
SPIN-ON
FUEL FILTER-_---JI~~~
1. Shut fuel supply off.
2. Loosen the fuel filter, turning counterclockwise with
a filter wrench.
3. Using a rag, wipe clean the sealing face on the
housing bracket so the new filter can be seated
properly.
4. Lightly oil the sealing O-ring on the new filter.
To reinstall, turn the filter assembly counterclockwise
carefully until the O-ring contacts the sealing surface
of the housing bracket. Turn 2/3 further with the filter
wrench.
5. Turn on the fuel and manually prime the fuel filter
using the priming pump on top ofthe housing. Use
a slow steady pumping action until resistance is felt.
The filter is now primed and the engine is ready
to start.
NOTE:
The cartridge contains fuel. Take care not to spill
it during disassembly. Peiform the "fuel system air
bleeding" after replacing the spin-on filter.
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.
Most installers include a type of 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 in this
diagram. 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 equipment. The ownerl
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 filtration/separation system.
FILTER/WATER
L
/SEPARATOR
FUEL INJECTION PUMP CONTROL
The fuel injection pump is precisely adjusted; most
of the adjustments are sealed, so be careful not to break
them. When an adjustment is necessary, contact your
WESTERBEKE dealer.
NOTE:
There is no warranty on engines with broken high
rpm governor adjustment seals.
NOTE:
The idle adjustment screw can be readjusted to pro-
vide for a satisfactory idle speed with each specific installa-
tion.
f"VtTf
WESJERBEKE
(Engines & Generators
16