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8-4
BATTERY
NY a 3 a ~
Fig. 3--Three
Minute Charge lest
(1) Connect the Positive
(+)
battery charger lead
to the battery positive terminal and negative
(-)
bat-
tery charger lead to the battery negative terminal.
IMPORTANT: Be sure of correct polarity when
charging batteries.
(2)
Trip the battery charger power switch to the
ON
position. Turn the charger timer switch past the
three minute mark then back to the three minute
mark.
(3)
Adjust the charge switch to the highest possible
rate not exceeding
40
amperes.
(4)
When the timer switch cuts off at the end of
3 minutes, turn the timer switch back to fast charge.
(5) Use the
4
volt scale of the battery starter tester
voltmeter on test units so equipped and quickly meas-
ure the voltage across each cell while the battery is
being fast charged.
A
faulty cell or cells
will
be de-
tected by a cell voltage variation of more than
.1
volt.
(6) If the cell voltages are even within
.1
volt, use
the 16 volt scale of the battery starter tester and
measure the total voltage of the battery posts while
battery
is
being fast charged. If the total voltage dur-
ing charge exceeds
15.5
volts, the battery is sulphated
and should be cycled and slow-charged until specific
gravity reaches 1.260 (See "Slow Charging").
NOTE: A slow charge
is
preferable
to
bring the bat-
tery up to a full charge.
If
the specific gravity remains constant after test-
ing the battery at one hour intervals for three hours,
(7)
Make another capacity test. If the capacity test
Fast Charging the Battery (Fig. 4J
If adequate time for a slow charge is not available,
a high rate (FAST) charge is permissible and will
give a sufficient charge in one hour enabling the bat-
tery and alternator to continue to carry the electrical
load.
Connect the positive
(+)
battery charger lead to
the battery positive terminal and the negative
(-)
charger lead to the battery negative terminal. If the
battery is not removed from the vehicle,
BE SURE
the
ignition switch is turned off and all electrical acces-
sories are off during charging.
CAUTION: The battery can
be
damaged beyond re-
pair unless the following precautions are taken:
the battery is at its highest state of charge.
does not meet specifications, replace the battery.
NY 8 3 9 A
Fig. 4-Fast
Charging the Battery
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