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65 ELECTRICAL SYSTEM
CIRCUIT BREAKER CHECK
To determine whether the circuit breaker
points are closing at the proper generator voltage
and also whether they will open upon decelera-
tion by amperage from the battery proceed as
follows:
1. Disconnect the battery wire at the voltage
regulator "B" terminal and connect the ammeter
between the voltage regulator "B" terminal and
the wire disconnected, Figure 3.
FIGURE 3
2. Connect voltmeter positive lead to base of
regulator and negative voltmeter lead to the
generator "A" terminal.
3. Set carburetor throttle lever adjusting screw so
engine will idle at approximately 400 R.P.M.
4. Increase engine R.P.M. by carefully rotating
the accelerator bell-crank while watching the
voltmeter gauge. When the voltmeter reads at
any point between 6.3 to 6.8 volts the circuit
breaker points should close and the ammeter
will now show that the generator is charging.
5. Next, slowly reduce the engine speed and
watch the ammeter. When the ammeter reads
4 to 6 amperes, negative side of zero, the c i r
cuit breaker should open and the ammeter
needle will return to zero. Perform operations
4 and 5 several times until you are sure your
readings are correct.
6. Proper adjustments can be made by bending
the spring hanger on the circuit breaker.
VOLTAGE REGULATOR CHECK
1. Disconnect the battery wire at the voltage regula-
tor "B" terminal and connect the test ammeter
between the voltage regulator "B" terminal and
the wire disconnected, Figure 4.
2. Connect the voltmeter positive lead to the regu-
lator base and the negative lead to the regulator
"B" terminal.
FIGURE 4
3. Run engine approximately 2000 R.P.M.
4. Vary resistance until ammeter reads 19 amperes
and then check the vo1t meter reading which
should be 7.25 volts. (Hot, cover in place.)
NOTE: If car is out of warranty the voltage
regulator can be set by bending the spring
hanger to get this necessary reading. The unit
must be first checked with the voltage regulator
cap in place as generally it will change the read-
ing from .1 to .2 of a volt and must be compen-
sated for in making this adjustment.
5. Stop engine, disconnect battery negative terminal
and then proceed to remove the tester leads from
the voltage regulator and install the wires back
onto the " B" terminal of the regulator.
6. Install the regulator cover.
CURRENT REGULATOR CHECK
1. Disconnect the battery wire terminal "B" and
connect the test ammeter between the v o 1 t age
regulator "B" terminal and the wire disconnect-
ed, Figure 5.
2. Connect a starter battery tester directly across
the battery and set load to 45 amperes or use the
equivalent in sealed beam lamps.
3. Run engine to approximately 2000 R.P.M.;
amperage reading should be 36 amperes. If it
is not within a tolerance of one to two amperes
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