Measuring Point - AMC Rambler 1965 Technical & Service Manual

2
Silicon
Reclifier
Te
rmin
o
ls
Housing
Stctor
I lO-Volt Tesl Lomp
Stqtor AC leods
FIGURE
|
- Stotor Ground
Test
shown
in
Figure
2.
Eoch phose
should
show
o
closed
circuit
or
indicote
o
low
resisto nce.
FIGURE
2 - Continuity Test
Alternotor
Phose Test (Three
AC
Leods Disconnected)
On
q
test block, run the
olternotor
ot
1000
R.P.M.
CAUIION:
Do
not
exceed
this
speed ofherwise high voltctge will
resu/f
ond
domoge the
olternotor.
Connect
on AC
voltmeter,
or
l2
volt
test lomp (seoled beom
heodlight
pre-
ferred with
elements
in
porollel),
ocross
the three AC
terminols shown
in
Figure
3, in turn
voltoge
or
lomp
bril-
lioncy should
be
the
some
ocross
phoses
1-2, 2-3,
ond
I
-3.
A
pro-
nounced difference
in
voltmeter
reod-
ing
or
lomp brillionce
indicotes
shorted
or
grounded stotor
windings.
2l
Condle Power Tesl Lomp
Check Three
Phqses
FIGURE 3 - Quick
Alternotor
Phose
Check
Rotor
Coil
Resistonce Test
To
meosure
the
resistonce
of
the
HEAVY
DUTY
AND
FLEET
EQUIPMENT
rotor, (field) coil winding,
remove
the
two
brush holders
ond slip ring
brush-
es. lnsert
the
ohmmeter
test prods
inlo
the
brush holder openings
ond
moke
direct contoct with eoch
of
the
two
slip rings. The rotor
coil
resistonce
(in
ohms) should opproximote
the
volues
listed
in
Figure
4.
Roted
Voltoge
Resislonce (Ohms)
1,0 t
.2 -r
FIGURE
4
-
Rotor Coil
Resistonce
Check
lf
very
little
resistonce
is reod,
the
coil could be
shorted.
lf
no
resistonce
is reod,
it
would indicote
o
posslble
open rotor coil circuit.
lf
upon
removol
of
the
brushes
it
is found thot
the
brush springs
ore
collopsed,
it
would
indicote
thot the rotor
hos
shorted
turns within
the
coil.
Resistonce Test
lvleosure
the
resistonce
in
ohms be-
tween
the
terminols
of the
regulotor
by
using
on
ohmmeter.
The
volues
should
opproximote (within 5
per
cent)
Regulotor Resislonce Meosurements
those given
in
the following toble.
lf
the
resistonce volues ore not
os
speci-
{led,
check
for
defective coils
ond
check the resistor
volues.
Voltoge Adiustment ond
Test
A
bottery
with
minimum
speciflc
grovity
of
1.250
must
be
used
for
the
following
odiustments
ond
tests'
Field Reloy (Cover On)
Connect
o
I2
volt bottery
to
the
regulotor ground
ond the
ignition
("lGN")
terminol
of
the
regulotor
with
o
0-75 ohm,
25 wott vorioble
resistor
in
series
with one
Ieod. Stort
with
oll
the
resistonce
cut
in
ond slowly
re-
move
the
resistonce
ollowing the
volt-
oge (meosured
from
"lGN"
terminol to
ground)
to
rise. The
lood reloy
element
should close
ot
6.8 to 7.0
volts.
To
increose
the
closing
voltoge,
in-
creose
the
spring tension;
to
decreose
the voltoge,
decreose
the
tension.
This
odiustment
is
mode
by
bending
the
lower orm
of
the spring
brocket.
Voltoge Regulotor (Cover Off)
Connect
the regulotor (cover
off)
in
the Alternoting
Current-Direct Current
chorging circuit
with
o
direct
current
0-100 ompere ommeter
in
serles with
the bottery leod
to
regulotor ond
o
di-
rect
current
voltmeter,0-15
volt,
ocross
from bottery terminol
or
regulotor
to
BtoG
BIoG
B
to
Bose
G to
Bose
FloG
FtoG
FtoG
F
to
Bose
G
to
Bose
IGN
to
Bose
IGN
to
F
IGN
to
F
IGN to
F
IGN to
C-J
IGN io
C-J
IGN to
C-J
(C-J
Common
Junction
ot Center
of
Bose)
MEASURING
RESIST.
POINT
(OHMS)
Open
U
Open
16
n
t5
8
i6
t6
5U
70
80
50
7i
70
60
REMARKS
F.R.
Open
F.R.
Closed
F.R.
Open
F.R.
Open
V.R.
Outer Contocts
Closed
V.R.
Armoture Flooting
V.R. lnner Contocts Closed
V.R.
Outer Contocts Closed
V.R.
Outer Contocts Closed
V.R.
Outer Contocts Closed
V.R.
Outer Contocts Closed
V.R.
Armoture Flooting
V.R. Inner Contocts Closed
V.R.
Outer Contocts
Closed
V.R.
Armoture Flooting
V.R.
lnner Contocts
Closed
F.R.
-
Field
Reloy
V.R. -
Voltoge
Regulotor
AC
Stotor AC
Leods
EITTIE:
Bqlter),
@