CHRYSLER SERVICE MANUAL
ELECTRICAL SYSTEM—113
40.
CHECKING DISTRIBUTOR VACUUM
ADVANCE
After checking governor advance check vacuum
advance. If vacuum advance is out of specifica-
tions adjust by adding or removing washers
as follows: Remove retaining plug and gasket
and remove washers. Check thickness of re-
moved washers and substitute thinner washer
if specified advance requires more than required
vacuum. Replace with thicker washer if vacuum
required to move plate is less than specified.
In some cases it may be necessary to replace
spring and then, adjust to specifications by
means of various combinations of washers. The
right combination of washers are installed when
distributor plate is rotated to its full position
with specified vacuum applied.
41.
INSTALLING AND ALIGNING CONTACTS
(FIG.
20)
Remove old contacts and install new set. Allow
for slack in conductor ribbon to eliminate pos-
sible breakage due to fatigue caused by ribbon
being too tight. Adjust spring tension 17 to
20 ounces.
Align contacts to provide center contact by
bending stationary contact only. Grip bracket
next to contact and bend it away from breaker
arm and then, bend it back to vertical. A new
stationary contact is always lower than arm.
It may be necessary to repeat bending process
•MAKER POINTS
LOCK SCREW
CAM
BREAKER POINTS
RUBBING BLOCK
STATIONARY PLATE
51x156
Fig.
20—Installing and Aligning Contacts
several times
to
provide perfect alignment that
is absolutely necessary
for
efficient ignition
and
good contact life.
It may be
necessary
to
twist
stationary contact
to
obtain alignment. Never
bend movable
arm.
Following alignment
of con-
tacts;
readjust clearance
.015 to .018
inch.
42.
ADIUSTING CONTACT POINT CLEARANCE
Measure clearance with feeler gauge, dial indi-
cator
or
with
a
dwell meter
.015 to .018
inch.
New contacts should always
be
adjusted
to .018
inch. This will allow rubbing block
to
wear into
cam contour
and
still provide specified clearance
when shaped.
Where dwell meter
is
used
to
check clearance
it
is
essential
to
first adjust clearance with feel-
er gauge
or
dial indicator.
A
dwell reading that
varies from specified clearance indicates that
one
or
more
of
following conditions
are
present
and must
be
eliminated.
(1)
Worn rubbing
block.
(2)
Rubbing block
not
square with
cam.
(3) Badly worn
cam (old
distributor).
(4)
Worn distributor bushings.
(5)
Moveable
con-
tact
arm
that
has
been bent.
On
dual breaker
arm distributors clearance should
be
same
for
both sets
of
contacts.
43.
DISASSEMBLY
OF
DISTRIBUTOR
(FIGS.
21 AND 22)
Remove vacuum chamber retaining screws,
vac-
uum lever
arm
spring clip retainer, washer
and felt. Remove vacuum unit
and
distributor
cap clamp springs. Loosen primary terminal
post
nut and
remove primary lead. Lift break-
er plate assembly from distributor.
Remove
cam
felt
and
spring clip retainer
from center
of cam.
Disengage anti-rattle
spring
and
remove
cam and
yoke. Place
dis-
tributor
in
vise
and
attach dial indicator
to
body
(Fig. 20.
Move shaft
to and
from dial
in-
dicator with just enough force
to
indicate clear-
ance.
Replace bushings and/or shaft
if
side
play exceeds
.005
inch. Drive rivet from collar
and shaft,
and
slide shaft from distributor body.
Wash
all
parts
in
solvent, except breaker plate
assembly
and
vacuum unit. Clean these parts
with
a
brush moistened with solvent* Blow
parts
dry
with compressed
air.
44.
REPLACING DISTRIBUTOR BODY
BUSHINGS
With distributor disassembled, place housing
in
MyMopar.com
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