1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

ELECTRICAL SYSTEM 6 - 19
3. Run engine at approximately 2000 RPM.
4. Turn resistor knob in until ammeter reads 10 to 15 amperes
and then check the voltmeter reading which should be 7.2 to
7.5 volts.
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 final-checked with the voltage
regulator cap in place as generally it will change the
reading from .1 to .2 of a volt and must be compensated
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 voltage regulator cover.
VOLTAGE REGULATOR ADJUSTMENT:
1. To adjust operating voltage remove cover and change the
armature spring tension by bending the lower spring
hanger. Increasing the tension raises the operating voltage;
decreasing the tension lowers it.
2. Replace cover and recheck.
3. After each adjustment stop the engine and restart it.
Bring engine up to speed and adjust current to 10 to 15
amperes before taking a reading.
CURRENT REGULATOR CHECK:
1. Disconnect the battery wire at the voltage regulator "B"
terminal and connect the test ammeter between the voltage
regula-
regulator "B" terminal and the wire disconnected, Figure 16.
2. Connect a starter battery tester directly across the battery
and set load to 50 amperes, or use the equivalent in seal
beam lamps.
3. Run engine to approximately 2000 RPM; amperage
reading should be 40 amperes. If it is not within a tolerance
of one to two amperes of this reading, the regulator
should be removed and taken to an authorized Auto-Lite
dealer for replacement.
NOTE: If car is out of warranty, remove the voltage cover
and adjust the current regulator spring hanger to the
necessary 40 ampere output. To prevent operation of the
voltage regulator unit while making this adjustment,
place a jumper across the voltage regulator points. For
final checking, the regulator cover must be in place on
regulator.
CAUTION: Momentarily touch the negative battery cable
to battery negative post to determine that there is no
sparking between the battery negative post and cable
terminal, then connect negative cable.
CURRENT REGULATOR ADJUSTMENT:
1. To adjust operating amperage, remove cover and change
armature spring tension by bending the lower spring
hanger. Increasing tension raises the operating amperage;
decreasing the tension lowers it.
2. Replace cover and recheck. Stop engine and restart after
each adjustment. Take readings with cover in place.
REGULATOR CONTACT POINTS:
FIGURE 16
In normal use the contact points on all three regulator
units will become grayed. If the contacts are burned,
dirty, or rough, the points should be filed just enough to
secure a smooth surface. File parallel with and lengthwise
to the armature. Clean the points with a piece of
linen or lintless bond tape dipped in carbon tetrachloride
and follow with dry tape. Use clean tape for each
set of contacts.