
The charging system consists
of
two alternators with external voltage regulators, an engine-mounted circuit
breaker, a battery and connecting wires.
Because
of
the use
of
IC's (integrated circuits), the electronic voltage regulator
is
very compact and
is
mounted on the rear bracket
of
the alternator.
Charging
Voltage Test
If you suspect that the alternator
is
not producing enough voltage
to
charge the engine's battery, perform
the following voltage test.
19
~10
RED
o
*'14 L T, BLUE
@]"'----'[§=2T
0..--,
4
'*'14 GREEN
ALTERNATOR -
51
A
Interconnections for Charging Voltage Test
1.
Using a volt/Ohms meter make sure that
12
Volts are at the EXC connection while the engine is running
and the oil pressure
EXC switches are closed.
2.
Using a voltmeter, connect the voltmeter's
red
wire clip
to
the B output terminal on the alternator. Refer
to
the schematic shown above.
3.
Connect the other wire clip
to
a ground on the engine.
4.
Start the engine and increase the engine's speed
to
2000 rpm. Now record the reading given
by
the
voltmeter.
The voltage reading
for
a properly operating alternator should be between 13.5
to
14.5 volts. If your alter-
nator
is
over
or
under charging, have
tt
replaced
or
rebuilt
by
a reliable service shop.
NOTE: Disconnect all battery power
to
the engine before attempting
to
disconnect or remove
the alternator(s) for repair.
39
Westerbeke Diesel Engines
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