ENGINE
TUNE-UP
6C-3
•
Contact points with an overall gray color and
only slight roughness or pitting need not be
replaced.
•
Dirty
points should be cleaned with a clean point
file.
Use only a few strokes of a clean, fine-cut
contact file. The file should not be used on other
metals and should not be allowed to
become
greasy or dirty. Never use emery cloth or sand-
paper to clean contact points since particles
will
embed and cause arcing and
rapid
burning
of points. Do not attempt to remove all rough-
ness nor dress the point surfaces down smooth.
Merely
remove scale or
dirt.
•
Replace points that are burned or badly pitted.
Where
burned or badly pitted points are en-
countered, the ignition system and engine should
be checked to determine the cause of trouble so
it
can be eliminated. Unless the condition caus-
ing point burning or pitting is corrected, new
points
will
provide no better service than the
old.
See section 6E for condenser check.
•
On 6 cyl. engines, adjust distributor point gap
to .019" (new points) or .016" (used points),
using a flat feeler
gauge.
Breaker
arm rubbing
block must be on high point of
lobe
during
adjustment.
NOTE:
Used
contact
points
should
be
cleaned
be-
fore
adjusting
with
a
feeler
gauge.
9.
Lubricate
distributor breaker cam sparingly
with
distributor cam lubricant.
10.
Install
rotor and distributor cap. Press all
wires
firmly into cap towers.
SERVICE
BATTERY
AND
BATTERY
CABLES
State
of
Charge
Test
1. Measure the specific gravity of the electrolyte
in
each cell. If it is below 1.230 (corrected to
80°F.),
recharge with a slow rate charger, and recheck
battery.
2. Connect a voltmeter across the battery ter-
minals
and measure the terminal
voltage
of the
battery during cranking (remove the coil secondary
lead during this check to prevent engine from firing).
If
the terminal
voltage
is less than 9.0 volts at room
temperature, approx.
80°F.),
the battery should be
further
checked. See section 12 for battery check-
ing procedure using the "421" Tester.
Inspect
for signs of corrosion on battery, cables
and
surrounding
area,
loose
or broken
carriers,
cracked
or bulged cases,
dirt
and
acid,
electrolyte
leakage and low electrolyte level.
Fill
cells to proper
level with distilled water or water passed through
a
demineralizer.
The
top of the battery should be clean and the
battery hold-down bolts properly tightened.
Particu-
lar
care should be taken to see that the top of the
battery is kept clean of acid film and
dirt
because of
the high
voltage
between the battery terminals. For
best results when cleaning batteries, wash first with
a
dilute ammonia or soda solution to neutralize any
acid
present and then flush off with clean water.
Care
must be taken to keep vent plugs tight so that
the neutralizing solution
does
not enter the cell. The
hold-down clamp should be kept tight enough to pre-
vent the battery from shaking around in its
holcjr,
but it should not be tightened to the point where the
battery case
will
be placed under a severe
strain.
To
insure
good
contact, the battery cables should
be tight on the battery posts. If the battery
posts
or
cable terminals are corroded, the cables should be
cleaned separately with a soda solution and a wire
brush.
After cleaning and before installing clamps,
apply a thin coating of petrolatum to the
posts
and
cable clamps to help
retard
corrosion.
If
the battery has remained undercharged, see
Charging
Circuit
- Preliminary
Checks,
section 6E.
If
the battery has been using too much water, the
voltage
regulator setting is too high.
GENERATOR
AND
REGULATOR
Unsatisfactory
results obtained during battery
test-
ing may indicate further
tests
and adjustments to
the generator and regulator as outlined in Engine
Electrical.
FAN
BELT
1. Inspect fan belt condition.
2.
Check
and adjust if necessary for correct ten-
sion of belt, as follows:
a.
Using a Burroughs tension
gauge
check the
fan
belt midway between the water pump pulley and
generator pulley.
b. Adjust generator on its mounting bracket to
proper
fan belt tension. See section 6A.
CHECK
OPERATION
OF
MANIFOLD
HEAT
VALVE
Check
manifold heat control valve for freedom of
operation. If shaft is sticking, free it up with heat
valve lubricant Pt. No.
1050422
or equivalent.
CHECK
INTAKE
MANIFOLD
BOLTS
To
check for a possible leak at the intake mani-
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