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The
distributors
ore
the
permonently
lubricqted
type,
however,
of
the
time
of
contoct
point
replocement
or
over-
houl,
opply
o
troce
of
high
melting
point
lubricont
to
the
breoker
com.
The vocuum
control unit
is
mounted
sepqrotely
on the
outside
of
the
dis-
tributor
housing.
The vocuum
control unit
consists
of
on
enclosed
spring-looded
diophrogm
linked
mechonico
lly to the
distributor.
The
oirtight
side
of
the
diophrognn
is
connected
to the
intoke
monlfold
side
of
the
corburetor.
Under
port
throttle
operotion,
the intoke
monifold
vocu-
um is
sufficient
to
octuote
the
dio-
phrognr
ond
couse
the
distrlbutor
to
rotote
in
its
mount, thus
odvoncing
the
spork
ond
increosing
fuel
economy.
During
occelerotion
or
when
the
en-
gine is pulling
heovily,
the
vocuum
is
not
sufficient
to
octuote the
diophrogm
ond
the
distributcr
is held
in the
re-
torded
position
by
o
colibroted
return
spring which
beors
ogoinst
the
vocu-
um diophrogm.
The
centrifugol
odvonce
mechonism
consists
of
on
outomotic com
octuoted
by two
centrifugol
weights
controlled
by
springs.
As the speed
of
the
dis-
tributor shoft
increoses
with
engine
speed,
the
weights
ore
thrown
out-
word
ogoinst
the pull of the
springs.
This
odvonces
the
corn cousing
the
contoct points
to
open eorlier
ond
thus odvoncing
the
spork.
The distributor
cop
should
be
re-
moved
ond wiped cleon with
o
dry
rog.A
visuol inspection should
be
mode
for
crocks,
corbon
runners, ond
corroded high
tension terminols.
lf
ony
of
these
conditions
ore
found,
the
cop
shou
ld
be
reploced.
ln
replocing
the
cop, be
sure
thot the high
tension
wires
ore
instolled
in the
some
towers
f
rom which they
were
removed
ond
thof they
ore
pushed
firmly down
in
ploce.
lf
the
inserts inside
the cop
CIre
ex-
cessively
burned,
the cop
should
be
reploced.
However,
the
verticol
f
oce
of
the
insert
wil
I
show
sonne evidence
of
burning through normol
operotion.
The
inserts
should
olso
be
checked
for
evidence
of
mechonicol
interference
with the rotor
tip.
The rotor should
be
visuolly
in-
spected
for
crocks, evidence
of
burn-
ing on the
top of the
metol strip,
or
evidence
of
mecho
nicol
interference
with
the cop.
lf
ony
of the
obove
con-
EI.ECTRICAL
ditions
ore
found,
the rotor
should
be
reploced. Some
burning
is normol
on
the
end
of
the
metol strip.
This
should
never
be
filed.
Condenser
Tests
The
purpcse
of
the
condenser
in
the
ignition
system is
to
prevent
orcing
ond
pitting
ot
the breoker
points
ond
to
oid
in
collopsing
the
mCIgnetic
{leld
of
the
ignition
coil. ln
order
to
function
prop-
erly ond to
ossure
good ignition,
the
condenser must
hove
three
importont
cho
rocteristics.
Minirnum Series
Resistonce
Correct Copocity
Minimum lnsulotion
Leckoge
The condenser
should be
checked ot
the
some
time
the
points
ore.
A
c0-
pocity,
leo
koge,
o
nd
o
series
resist-
once
test
should
be
mode
on the
con-
de nser.
For
o
complete check
of
the
con-
denser
follow the
instructions
of
the
Test Eqripment
Monufocturer
being
used.
Contoct
Points
The
distributor
points should
be
visuo
I
ly
inspected
ond
if
the
contocts
ore
bodly burned
or
pitted,
they
should
be
reploced.
Contoct points should
be
reploced
or
dressed
with
o
cleon,
fi
ne-cut
con-
toct
fi
le.
The
fi
le
shou
ld
not be
used
on other
metols
ond should
not be
ol-
lowed
to
become greosy
or
dirty"
Nev-
er
use
emery
cloth
to
cleon
contocl
points. Contqct
surfoces,
ofter
consid-
eroble use,
moy not
oppeCIr bright
ond
smooth,
but
this is
not
necessorily
on
indicotion
thot they ore not
func-
tion
ing
sotisf
octori ly.
Oxidized contoct
points moy
be
coused
by
high
resistonce
or
loose
con-
nections
in the
condenser
circuit,
oil
or
foreign
moteriols
on the
contoct
sur-
foces,
or
most
commonly,
high
breok-
ing
current.
Check
for
these conditions
where
bu
rned
contocts
o
re
experi-
enced.
Contoct Set R"plocement
The
contoct
point
set
is
reploced
os
o
complete ossembly.The service
re-
plocement contoct set
hos
the
breoker
lever
spring
ond point
olignment
pre-
odiusted
ot
the foctory.
Only
the
dwell
ongle (point opening)
requires
odiust-
ment
ofter
rep
locement. Rough
con-
tocts
which
ore
"greyish" in
c,olor
hove
o
g
reoter oreo
of
contoct
tho
n
new
contocts;
ond
will
proviCe
sotisfoctory
service
u
ntil
most
of
the
tu
ngsten
is
worn
off.
Pitted
or
tro
nsf
erred
con-
tocts is
o
normol condition
ond
should
not
necessorily
be
reploced
un
less the
tronsfer
hos exceeded .020".
+
Reploce
Contoct
Set
When Tronsfer
Hos
Exceeded
.02A"
t
FIGURE
57
-
Contoct
Point
Moteriol
Trqnsfer
The
condenser
ond
primory
leods
ore retoined
by
breoker
pcint
spring
lension.
Relieve
the
tension
to
remove
leods.
Loosen
the
contoct bose
retoining
screw
to
remove
the
contoct
set
os-
sembly.
Dwell Meter Check
After
checking
ond
odiusting
con-
toct
point opening
to
specificotions
check
the
co
m
o
ng
le
or
dwell
with
o
contoct
ongle
meter.
lf
the com
ong
le
is
less
thon the
specified
minimum,
check
for
defective
or
misq
ligned
con-
toct
points
or
worn
distributor
com
lobes.
The
voriotion in
com
ongle
reod-
ings between
idle
speed
ond
175A en-
gine
R.P.M.
should
not
exceed
3
o.
Ex-
cessive
vcriotion
in this speed
ronge
in-
dicotes
weor in
the
distributor.
NOIE,
Com
ongle
reodings
loken
at
speeds
obove
17
50
engine
i#,::',,U;";"1:::"'o'"
on
Breoker Lever Spring
Tension
One
of the
most importont
items
to
check is
the breoker
lever
spring
ten-
sion. This
is
checked
with
o
spring
scole hooked
immediotely
behind
the
breo
ker
lever contoct. Spring
tension
required
to
open
the
contoct
points
shou
ld be
17
-2]
ounces.
The
breoker
lever
on
new set
wil'l
produce
o
ten-
sion exceeding
thot
specifled. To
odiust
the spring
tension
on
o
new
set
of
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