source of current
for
the ignition system when starting the
engine or operating at idling speed.
The
generator
fur
-
nishes the ignition currene
at
higher speeds.
The
distributor mounting provides a means
of
properly
setting the initial ignition timing.
The
spark advance
for
various speeds
and
loads
is
controlled
automatically
by
governor weights and vacuum
contra]
in
the distributor.
The
octane se1ector at the rear of the distributor mounting
provides a means
of
advancing
Or
retarding the ignition
timing for the grade of fuel being used.
The
battery
and
generaLing system must be kept in good
operating condition
in
order to obtain satisfactory opera-
tion of the ignition system.
All
wiring connections
in
the
ignition circuit should be kept tight
and
free from
dirt
and
corrosion. Keep the high tension wires free
from
grease and
tight
in
the distributor cap and coil.
GENERATING SYSTEM
The
generating system consists
of
the generator, voltage
and
current.
regulator, ammeter
and
necessary wiring.
The
ammeter indicates whether current
is
being supplied
to
or removed
from
the battery.
The
generator
has sufficient capacity to supply all regu-
larly used accessories
and
keep the battery fully charged
providing the
system
is
in
good condition.
52
The
generator output
is
cont
roll
ed
by the combined cur-
renl and voltage regulator and
cutOUt
relay.
The
cutout
relay points close when
th
e generator voltage
is
higher than
the battery voltage so that current can
Row
to
th
e banery
and open when the generator voltage
is
lower than the
battery voltage
to
prevent the
battery
from discharging
through the generator.
The
current regulator protects the generator
by
pr
eventing
the generator output from exceeding 45
to
51
amperes.
The
voltage regulator protects the battery and electrical
system
by
preventing the generator vohage
from
exceeding
7.0
to
7.7 volts.
The
cutout relay points open at 0-4 amperes and close
at
6.4 volts.
The
connections
in
the entire generating circuit
must
be
kept tight
and
free from corrosion
or
anything
that
wiJJ
c34Se high resistance in the circuit.
The
generator should
be
lubricated
a.
described on page 60.
The
maintenance
of
the generating syslem, especially
the
voltage and current regulator, require lhe use
of
special
equipment not generally available to the
vehicle owner.
~t
periodic intervals of approximately 5000 miles, the
te~
minals, external connections and wiring, mounting,
belt
and
pulley should
be
checked.
The
CO=Ulator
and brush
inspection can
be
made through the openings
in
the
com
-
mutator end frame. II lbe commutator
is
dirty
or
if
the
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