Chevrolet 70 1969 Series Shop Manual page 376

( )
a
All cells read 1.95 or higher
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L ess than .05 v o lt
GOOD BATTERY
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One or more cells read 1.95 or higher
M ore than'
.05 v o lt difference
REPLACE BATTERY
B O O S T C H A R G IN G FO R T H E L IG H T L O A D T E S T
Boost charge 12-volt batteries having an am ­
pere hour capacity of 100 or less at 50 amperes
for 20 minutes (50 x 20 = 1000 ampere minutes).
Boost charge batteries having an ampere hour ca­
pacity of over 100 at 60 amperes for 30 minutes
(60 x 30 = 1800 ampere hour minutes). If charger
will not give this rate, charge for an equal number
of ampere minutes at best rate available.
IM P O R T A N T : For purposes of this test, do
not boost battery more than the amount indicated.
C H A R G IN G A F T E R T H E L IG H T L O A D T E ST
For best performance, a good battery should
be fully charged before being returned to service.
If batteries are to be fully charged by means of
a quick charger, the charge rate must be "tapered"
(reduced to a safe limit) when the electrolyte temp­
erature reaches 125°F., or when gassing becomes
excessive. Failure to do so may harm the battery.
Sufficiently Charged
Figure 2 — Battery Light Load Test
0
Celk read both above and below 1.95
L ess than .05 v o lt
GOOD BATTERY
( ) All cells read less than 1.95
d
BOOST-CHARGE AND RETEST
N E W V E H IC L E S IN S T O C K
1. Check electrolyte on each new vehicle re­
ceived; add sufficient distilled water to bring the
electrolyte up to bottom of vent wells. D O N O T
O V E R F I L L .
2. Check electrolyte and add distilled water
as necessary at weekly or semi-monthly intervals,
depending upon the weather. W a r m weather causes
greater water loss.
3. If the specific gravity of the battery is be­
low 1.215 (corrected to 80°F .), remove it from
vehicle and place it on a charging line. Charge the
battery until the specific gravity reaches 1.260-
1.280.
Before a new truck is placed in service, make
sure the specific gravity of the battery electrolyte
is at least 1.250, preferably higher. Under no cir­
cumstances should acid be added to a new battery,
to increase the specific gravity of the electrolyte.
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L
ENGINE ELECTRICAL 6Y-5
Requires Charging
T-508 -