FUEL
SYSTEM
GLOW
FLUGS
GLOW
PLUGS
To
inspect
the plug, remove the electrical terminal connections,
then
unscrew
each plug from the cylinder head. Thoroughly
clean
each
plug's tip and threads with a soft brush and cleaning
solution
to
remove any carbon and oil deposits. Visually
examine
the plug tip for electrical erosion if this is evident,
replace
the
glow plug.
TIP'
+
Touch
one
prod
to
the glow plug's wire connection, and the
other
to
the
body
of
the glow plug, as shown. A good glow
plug
will
have a 1.0 -
1.5
ohm resistance. This method 'can
TIGHTENING
TORQUE
be
used
with
the plug in or out
of
the engine.
You
can also use
an
ammeter
to test the power drain
(8
- 9 amps per plug)
1.0
-
1.5
M-KG
(7
-11
Fr-LB)
Re-install
the plugs
in
the engine and test them again. The
plugs
should
get very hot (at the terminal end) within 7 to
15
seconds_
If
the plugs don't heat up quickly, check for a short
circuit.
When
reinstalling the glow phigs, use anti-seize
compound
on
the threads. (sparingly).
FUEL
INJECTION
PUMP
The
fuel
injection pump is the most important component
of
the
diesel
engine
and,
therefore,
calls
for
the
utmost
caution
in
handli
ng.
The fuel injection pump has been thoroughly
bench-tested
and should not be tampered with.
Speed
(hertz)
and timing are the only adjustments the
servicing
dealer can perform on the injection pump. See the
ENGINE
ADJUSTMENT section in this manual. Other types
of
adjustments
or repairs must be performed by a qualified
injection service shop.
NOn:
When
servicing
the
jnjection pump, the service shop
must
be
advised
that the pump
is
being used
in
a generator
application.
FUEL
RETURN
ACTUATOR
.
<>
,
BLEED
SCREW
-
THE
INJECTION
PUMP
BLEEO
SCREW
SHOULD
BE
LEFr
IN
THE
OPEN
POSITION.
mls
WILL
ALLOW
FOR
AIR
IN
THE
FUEL
SYSTEM
TO
BE
DELIVERED
BACK
THRU
THE
FUEL
RETURN
SYSTEM
DURING
ENGINE
OPERATION
.
,-
FUEL
INJECTION
PUMP
FUELIN~
FUEL
LI
FT
PUMP
INLET
FUEL
FILTER
----
FROM
INJECTORS
FUEL
RETURN
FUEL
FILTER
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 connecl1on at
one
of
the
pumps mounting bolts should be clean and well
secured
by
the mounting bolt to ensure proper pump
1_
Shut off the fuel supply
to
the generator. Disconnect the
fuel supply line to the inlet filter and unscrew the filter
from the pump inlet. Take care to catch any fuel that may
be present.
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.
2. Thread on the replacement inlet filter and connect the fuel
supply line.
Use care when connecting and tightening the
fuel supply line so as not to distort the inlet filter.
...v-
WESTERBEKE
Engines & Generators
65
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