Hudson 1955 Rambler, Technical & Service Manual

Page: 49 / 292

FIGURE 4— Adjusting the Circuit Breaker
Opening Voltage
FIGURE 5— Checking Voltage Relay Armature
Air Gap
To adjust the operating voltage, change
the armature spring tension by bending the
hanger at the lower end of the armature
spring. After each adjustment stop the
engine; then restart it. Bring it up to speed
and adjust the current before taking a
reading.
In order to obtain an accurate indication
of the operation of the voltage regulator
unit, connect a headphone (2000 ohms or
higher) between the "F" terminal and ground
to pick
to pick up the sound of the opening and closing
of the contacts. The clicks should be regular and
clear without irregularities or missing. If the
tone is not clear and regular, remove the
regulator cover and inspect the contacts. The
contacts should be flat and not burned exces-
sively and should be aligned to make full face
contact. If the contacts require cleaning, refer
to subject "Contacts."
Current Regulator (Center Unit—with
Heavy Wire Winding)
Connect the regulator and instruments as de-
scribed above for the voltage regulator and run
the generator at approximately 3000 generator
R.P.M. Turn on lights and accessories so that the
generator must charge at its maximum rate. The
ammeter should show a reading within the limits
specified.
Before adjusting the operating amperage, check
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.
To adjust the operating amperage, change the
armature spring tension by bending the hanger at
the lower end of the armature spring. After each
adjustment. stop the engine; then restart it.
Bring the engine up to speed and take an ammeter
reading. Have the cover on the unit when taking
readings.
In order to obtain an accurate indication of
the operation of the current regulator unit
connect a headphone (2000 ohms or higher) between
the regulator "F" terminal and ground to pick up
the sound of the opening and closing of the
contacts. The clicks should be clear and regular
without irregularities or missing. If the tone is
not clear and regular, remove the regulator cover
and inspect the contacts. The contacts should be
flat and not burned excessively and should be
aligned to make full face contact. If the contacts
require cleaning, refer to subject "Contacts."
Contacts
Inspect the contacts on all three units. In normal
use, the contacts will become gray in color. If
the contacts are burned or dirty or if they are
not smooth, file the contacts with a No. 6
American Swiss cut equalling file. Move the file
parallel and lengthwise to the armature (Fig. 6).
File just enough so that the contacts present
a smooth surface toward each other. It is not
necessary to remove every trace of burning. After
filing, dampen a piece of linen or lintless bond
tape in refined carbon tetrachloride and draw the
tape between the contacts. Repeat with a dry piece
of tape. Use clean tape for each set of contacts.
8
T E C H N I C A L S E R V I C E M A N U A L