Installation manual
GLOW
PLUGS
DESCRIPTION
The glow plugs are wired through the preheat solenoid.
When PREHEAT
is
pressed at the control panel this solenoid
should
"click" on and the glow plug should begin to get hot.
INSPECTION
To
inspect the plug, remove the electrical terminal connec-
tions, then unscrew or unclamp each plug from the cylinder
head. Thoroughly clean each plug's tip and threads with a
soft brush and cleaning solution to remove all the carbon and
oil
deposits. While cleaning, examine the tip for wear and
burn erosion;
if
it has eroded too much, replace the plug.
TESTING
An accurate way
to
test glow plugs is with an ohmmeter.
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
0.4 - 0.6 ohm resistance. This method can be
used with the plug
in
or out
of
the engine.
You
can also use
an ammeter
to
test the power drain (5 - 6 amps per plug).
A
WARNING:
These
glow
plugs
will
become
very
hot
to
the
touch.
Be
careful
not
to
burn
your
fingers
when
testing
the
plugs.
~
GLOW
PLUGS
/;
FROM
PREHEAT
TERMINAL
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 plugs, use anti-seize
com-
pound
on
the threads.
A
WARNING:
Do
not
keep
a
glow
plug
on
for
more
than
30
seconds.
Glow
Plug
Tightening
Torque
19.5
H-Ib
(2.7
m-kg)
~=:::::;IC;;;;==;;;:;):="""",!~
TERMINAL
TESTING
A
GLOW
PLUG
WITH
AN
OHMMETER
KEYIPREHEAT-QPi
TESTING
A
GLOW
PLUG
USING
A
TEST
LIGHT
END
TIP
+
Engines & Generators
26