ELECTRICAL
EQUIPMEW
Page
M19
engine speed to just foster than idle ond a reoding of more thon
1
omp
should be obtained.
If
less than
1
amp, check brushes and slip rings.
(f)
Switch off engine and disconnect ammeter and reconnect field. Run
the engine at a speed just foster than idle,
and using the
0
-
30V
voltmeter check the voltage rwding between the output terminal (B+)
and ground, and the positive
(+)
terminol on the battery and ground.
The
readings should be
14.2
volts
-
+0.5V
at
25O~.
If
there
is
a
difference of more than
0.3
volts between the two
readings,
check
the wiring and terminals for corrosion or breaks.
If the reading
is
well below
19
volts, then carry out the following test (g).
(g)
Switch off engine, disconnect field winding and connect field
terminal to the output terminal
(B+).
With the
0-30V
voltmeter
connected between output terminol
(B+) ond ground, run tne engine
at a fast idle speed. If the reading on the voltmeter rises to between
14
and
16
volts, then the regulator
is
deflective and should be
re
-
placed. If the reading
is
very low, reploce the rectifier dioder,
also check stator. Switch off engine.
(h)
To
check the stator, remove all electrical connections to the
olternator and carry out an
iqsulation check between the al temator
housing and each of the stator windings, using an ohmmeter. The
meter reading should be infinity.
FIG.
B
WITH
IGNITION
OFF
d
Volm.mr
&Ingo
1nd)oam
nwml
wndWons
OULATOR
CONNECTED
VENICLE
HARNESS
A
11
Crrnnecti
mr
have
to
be
used
ESPRIT
Isscm
wff8
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