Hudson 1955 Rambler, Техническое и сервисное руководство

Страница: 48 / 292

-meter from the regulator "A" terminal to the
regulator base and place a reliable thermometer
near the regulator (about 2" from the regulator
cover but not touching the regulator).
Disconnect the field lead from the regulator
"F" terminal and insert a variable resistance (3
amp.-50 ohm capacity) between the lead and the
regulator terminal.
Run the generator at about 1000 generator
R.P.M. Insert all the resistance in the field
circuit. Then slowly reduce the resistance,
noting the voltage reading just before the change
caused by the closing of the circuit breaker.
Increase the charging rate to the figure speci-
fied for the regulator being tested. Then reduce
the charging rate by inserting resistance in the
field circuit. Note the voltmeter and ammeter
reading just before the circuit breaker opens and
the ammeter reading drops to zero. The closing
voltage and the opening voltage or current should
be within the limits specified.
An accurate method for noting the exact
instant of opening or closing of the circuit
breaker is to connect a headphone (2000 ohms or
higher) to the battery and armature terminals of
the regulator. When the contacts open or close,
a click will be heard in the headphone.
Before adjusting circuit breaker opening or
closing voltage, check the armature air gap .031"
to .034"; contacts should be open and the
armature against the upper stop (Fig. 2). Measure
the gap with the gauge as near to the hinge as
possible.
To adjust the closing voltage, change the
armature spring tension by bending the hanger at
the lower end of the spring (Fig. 3). Increase
the spring tension to raise the closing voltage
or decrease the tension to lower the voltage.
To adjust the opening voltage, raise or lower
the stationary contact keeping the contacts
perfectly aligned (Fig. 4). Increasing the
contact gap lowers the opening voltage. Change
the contact gap by expanding or contracting the
stationary contact bracket, keeping the contacts
aligned. Do not adjust the gap between the
contacts to less than the specified minimum.
Voltage Regulator (End Unit—with Fine
Wire Winding)
Connect the ammeter as noted above and connect
the voltmeter from the regulator "B" terminal to
the regulator base. Remove the variable resis-
tance from the field circuit.
Operate the generator at one-half maximum
output for 15 minutes to make sure the regulator
is at normal operating temperature. Have the
cover on the unit during this warm-up period and
when taking readings.
Stop the engine. Then bring it up to approxi-
mately 2500 generator R.P.M. Adjust the amperage
to one- half maximum output by turning on lights
or accessories and then
FIGURE 2— Circuit Breaker Armature Stop. for
Control of Air Gap
FIGURE 3— Adjusting the Circuit Breaker
Closing Voltage
note the voltmeter reading. This reading
should be within the limits specified for the
voltage regulator operation.
Before adjusting operating voltage, check
voltage relay armature air gap .048" to
.052"; contacts should be closed with a high
limit gauge in place (Fig. 5) and open with
a low limit gauge on the contact side and
next to the brass armature stop pin.
E L E C T R I C A L
7