Specifications
ENGINE
ADJUSTMENTS
GLOW
PLUGS
The
glow
plugs
are wired through the preheat
solenoid.
When
PREHEAT
is
pres~ed
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 tenninal
connec-
tions,
then
unscrew or unclamp each plug
from
the
~ylinder
head.
Thoroughly clean each plug's tip
and
threads
w,ith
a
soft
brush
and
cleaning solution
to
remove all the carbon
and
oit"
deposits.
While cleaning, examine the tip for
wear
and
bum
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
1.0
-
1.5
ohm resistance. This method
can
be
used
with
the plug in or out
of
the
engine.
You
can
also
use
an
multimeter
to
test the power
drain
(8
- 9
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
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
compound
on
the
threads.
A
WARNING:
00
not
keep
a
glow.p/ug
on
for
more
than
30
seconds.
GLOW
PLUG
TIGHTENING
TORQUE
1.0·1.5
M-KG
(1-11 FHB)
II
TERMINAL
END
TESTING
WITH
.
,__--"I.--=-_
AN
OHMMETER
;,
.
~.
'PREHEAT
ON
USING
A
TEST
LIGHT
OIL
PRESSURE
To
test the
oil
pressure, remove the
oil
pressure
sender,
then
install a
mechanical
oil
pressure gauge
in
it's
place,
After
warming
up
the engine; set the engine speed
at
1800
rpm
and
read
the
oil
pressure gauge.
011
Pressure
35·55
(b/io'
(2.5
-
3.B
kg/cm')
LOW
OIL
PRESSURE
A
gradual
loss
of
oil
pressure usually indicates a
worn
bear-
ings.
A
rapid
loss
of
oil
pressure indicates a specific
bearing
failure.
For
I;ldditional
information
on
low
oil
pressure
read-
ings,
see
the
ENGINE
TROUBLESHOOTING
chart.
TESTING
OIL
PRESSURE
OIL
PRESSURE
SWITCHES
There
are
two
oil
pressure switches. One is wired
to
the
automatic
shutdown
circuit
(see
safety shutdown switches)
to protect
the
engine
from
a sudden loss of oil or very low oil
pressure.
The other oil pressure switch is available for connecting
to
an
(optional)
audible alarm that would sound a low pressure
alarm
(before
the
shutdown switch activates and shuts the
engine
down).
Note
that
this
audible
alarm
will sound momentarily when
the
engine
is
started
and
sound
again when the engine
is
shut
off.
this
occurs
as
the
oil
pressure
drops below
10
psi.
+
Engines & Generators
24