Hudson 1948 - 1952, Service Manual

Page: 36 / 333

2 - 16 ENGINE TUNE-UP
3. Set carburetor throttle lever adjusting screw so engine will
idle approximately 400 R.P.M.
4. Increase engine R.P.M. by carefully rotating the accelera-
tor bellcrank while watching the voltmeter gauge.
NOTE: When the voltmeter reacts at any point between
6.4 to 7 volts the circuit breaker points should close and
the ammeter will now show that the generator is charging.
When the circuit breaker points close, a slight drop back
of the voltmeter needle will be noticed. In the event the
drop back is not evident, slightly discharge the battery and
recheck
5. Next slowly reduce the engine speed and watch the
ammeter.
NOTE: When the ammeter reads 4 to 6 amperes, negative
side of zero, the circuit breaker should open and the am-
meter needle will return to zero. Perform operations 4 and
5 several times you are sure your readings are correct.
6. Proper adjustments can be made by bending the spring
hanger on the breaker. See "Circuit Breaker Adjustment".
VOLTAGE REGULATOR CHECK:
1. Disconnect the battery wire at the voltage regulator" B"
terminal and connect the test ammeter between the volt-
age regulator "B" terminal and the wire. disconnected.
NOTE: Test ammeter resistance knob must be in the
"Out" position before connecting test leads.
2. Connect the voltmeter positive lead to the regulator base
and the negative lead to the regulator "B" terminal, Figure
25.
FIGURE 25
3. Run engine at approximately 2000 R.P.M.
4. Turn resistor knob in until ammeter reads 18 amperes and
then check the voltmeter reading which should 7.2 to 7.4
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 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 the operating voltage remove cover and change
the armature spring tension by bending the lower spring
hanger. Increasing tension raises the operating voltage;
decreasing the tension lowers it.
2. Replace cover and re-check.
3. After each adjustment of the voltage regulator, stop and
re-start it. Bring engine up to 3000 R.P.M. and adjust
current to 15 amperes before taking a reading.
CURRENT REGULATOR CHECK:
Disconnect the battery wire at the regulator "B"
terminal and connect the test ammeter between the
voltage regulator "B" terminal and the wire disconnected,
Figure 26.
FIGURE 26