Hudson 1948 - 1952, Service Manual

Page: 154 / 333

6 - 18 ELECTRICAL SYSTEM
1. Inspect wiring between voltage regulator and generator.
(See "Wiring Check", page 9.)
2. Make sure generator operates correctly without the
regulator in the circuit. (See "Generator Check".
3. Check battery specific gravity and terminal voltage. If
battery is not up to specifications, substitute a fully
charged battery of the same type and capacity for test
purposes.
CIRCUIT BREAKER CHECK:
To determine whether the circuit breaker points are
closing at the proper generator voltage and also whether
they will open upon deceleration 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
14.
FIGURE 14
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 RPM.
4. Increase engine RPM by carefully rotating the accelera-
tor bellcrank while watching the voltmeter gauge.
NOTE: When the voltmeter reads 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.
5. Next slowly reduce the engine speed and watch the am-
meter.
NOTE: When the ammeter reads 4 to 6 amperes, negative side
of zero, the circuit 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.
CIRCUIT BREAKER ADJUSTMENT:
1. To adjust the closing voltage, remove cover and change the
armature spring tension by bending the lower spring hanger.
Inc r e a s i n g the tension raises the opening voltage; decreasing
the tension lowers the opening voltage.
2. To adjust the opening voltage, raise or lower the stationary
contact by expanding o r contracting the bracket, keeping the
points perfectly aligned. Increasing the gap lowers the opening
voltage; decreasing the gap raises the opening voltage. (Contact
gap must not be less than 0.015".)
3. Replace cover and recheck.
VOLTAGE REGULATOR CHECK:
1. Disconnect the battery wire at the voltage regulator "B" termi-
nal and connect the test ammeter between the voltage regulator
"B" terminal and the wire disconnected.
2. Connect the voltmeter positive lead to the regulator base and
the negative lead to the regulator "B" terminal, Figure 15.
FIGURE 15