Chevrolet 1977 light duty truck, Руководство по обслуживанию

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Fig. 6 D -9B --S p a rks o r Flam es
requires almost twice the recharging as a 40 A.H. battery.
2. Tem perature of the battery electrolyte.
E X A M P L E :
About two hours longer will be needed to
charge a 0°F (-18°C). battery than a 80°F (27°C) battery.
3. Battery state-of-charge at the start of the charging
period.
E X A M P L E :
A completely discharged battery requires
twice as much charge in am pere-hours as a one-half charged
battery.
4. Battery age and condition.
E X A M P L E : A battery that has been subjected to severe
service will require up to 50% more am pere-hour charging
input than a relatively new battery.
The following basic rule applies to any battery charging
situation:
If the charge indicator is dark and the green dot is not
visible, charge battery until dot appears, but not more than
60 am pere-hours (for example 15 amperes for four hours).
Do not exceed a charging rate of 20 amperes during charging.
N O T E : Some chargers are constant current chargers
while others are constant voltage chargers. If a constant
voltage charger is used for charging the battery and the
green dot fails to appear after prolonged charging, it may
be necessary to tip the battery slightly from side to side
a few times for the green dot to appear.
If the charge indicator is light replace battery. DO NOT
attem pt to charge or "jump" when charge indicator is light.
N O T E :
A battery that failed prematurely, and exhibited
a light charge indicator condition, may indicate a need
for checking the charging system of the vehicle.
F or the most satisfactory charging, the lower charging
rates in amperes are recommended.
A n "emergency boost charge", consisting of a high
charging rate for a short period of time, may be applied as
a tem porary expedient in order to crank an engine. However,
this procedure usually supplies insufficient battery reserve to
crank a second and third time. Therefore, the "emergency
boost charge" m ust be followed by a subsequent charging
period of sufficient duration to restore the battery to a
satisfactory state of charge. Refer to the charging guide in
this section.
When out of the vehicle, the sealed side term inal battery
will require adapters (Fig. 6D-10B) for the terminals to
provide a place for attachm ent of the charging leads.
A dapters are available through local parts service.
Fig. 6 D - 10 B -C h a rg in g and T e s tin g A d a p te rs
When the side terminal battery is in the vehicle, the studs
provided in the wiring harness are suitable for attachm ent of
the charger’s leads.
CAU T I ON : Exercise care when attaching charger
leads to side term inal studs to avoid contact with
vehicle m etal com ponents which would result in
damage to the battery.
T E S T I N G P R O C E D U R E S
Testing procedures are used to determine whether the
battery is (1) good and usable, (2) requires recharging or (3)
should be replaced. Analysis of battery conditions can be
accomplished by performing a visual inspection, instrum ent
test and the full charge hydrom eter test. Refer to test
procedure chart in this section.
Visual Inspection
The first step in testing the battery should be a visual
inspection, which very often will save time and expense in
determining battery condition.
• Check the outside of the battery for a broken or
cracked case or a broken or cracked cover. If any damage
is evident, the battery should be replaced.
• Observe battery state of charge indicator to determine
condition of battery.
• Check for loose cable connections. Correct as required
before proceeding with tests.
Instrument Test
A num ber of suppliers have approved testing equipment
available. These testers have a programmed test procedure
consisting of a series of timed discharge and charge events,
requiring approximately 2 to 3 minutes, that will determine
the condition of the battery with a high degree of accuracy.
When using these testers, the procedure recommended by the
tester m anufacturer should be followed.
I N S U L A T O R S T R A P
P R E V E N T S T O O L S E P A R A T I O N
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