Installation manual
DIESEL
FUEL
FUEL
SYSTEM
Use
No:2-D
(SAE
J313)
diesel
fuel
with a Cetane rating
ofll45
or
higher.
Grade
of diesel
fuel
according
to
ASTMD975.
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 contaminant's
froni
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
contaminant's in the
fuel
can
cause.
A
typical
fuel
filter/water
separator
is
illustrated
below.
This
is
the
Rayeor
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.
TYPICAL
FUEL
FILTER
(OWNER
INSTALLED)
FUEL
INJECTION
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
disassemble
and
repair
it.
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
pumps
mounting bolts
should
be clean and
well
secured
'by
the mounting bolt
to
ensure
proper
pump
operations.
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.
A small fuel filter has been added to the incoming fuel
line to ensnre that filtered fuel enters the fuel Iiftpnmp.
EXTERNAL
FUEL
FILTER
PART
NO,
2144B
LIGHTLY
WIPE
WITH
CLEAN
FUEL,~---»-i~~~
THE
a-RING
GASKET
ONLY
NEEDS
TO
BE
REPLACED
IF
IT
SHOWS
SIGNS
OFWEAR
PRE·FILL
WITH
FRESH
,ute--
FUEL
FILTERS
20A
CIRCUIT
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.
ENGINE
FUEL
FILTER
Periodically check
the
fuel
connections
and
the
bowl
for
leakage.
Replace
the
filter
element after the first
5Q
hours
.
then
follow
the
MAINTENANCE
SCHEDULE.
Changing
the
Fuel
Filter
Element
Refer
to
the
illustration
above.
1.
Shut off the fuel
supply.
2.
Thrn
the fuel
filter
bowl counterclockwise
to
remove.
3.
Pull the
filter
element straight down
and
off.
4.
Inspect both
O-rings
and
replace
if
worn.
5.
Wipe
the
O-rings
with
clean
fuel and
snap
the
new
filter
up
into place
over
the
small
O-ring.
6.
Clean off the
filter
bowl
and
threads.
(The
bowl
can
be
pre-filled with
fuel).
Screw
the bowl into
place
when
the
O-ring
contacts
the
housing.
Tighten
the
bowl
firmly
by
hand.
7.
The key-on
preheat
sequence
will
allow
the lift
pump
to
.fill
the
fuel
filter.
S.
Run the engines
and
inspect for
leaks.
,.yo
WESTERBEKE
Engines
&
Generators
15