Engine Electrical; Battery - Chevrolet 10 1971 Series Chassis Service Manual

G e n e ra l D e s c r i p t i o n ............................................................................. 6Y-1
P e r io d ic S e r v ic e ......................................................................................6Y-2
C o m m o n C auses o f F a i l u r e .......................................................... 6Y-2
E le c tro ly te L e v e l ................................................................................6Y-2
W a te r U s a g e .........................................................................................6Y-3
C le a n in g .................................................................................................. 6Y-3
C a r r ie r and H o ld - D o w n ................................................................... 6Y-3
Safety P r e c a u t i o n s ................................................................................6Y-3
C h arg in g P r o c e d u r e s .............................................................................6Y-3
The Battery (fig. lb) is made up of a number of separate
elements, each located in an individual cell in a hard
rubber case. Each element consists of an assembly of
positive plates and negative plates containing dissimilar
active materials and kept apart by separators.
elements are immersed in an electrolyte composed of
dilute sulfuric acid. Plate straps located on the top of
each element connect all the positive plates and all the
negative plates into groups. The elements are connected
in series electrically by connectors that pass directly
through the case partitions between cells. The top is a
one piece cover. The cell connectors, by-passing through
the cell partitions, connect the elements along the short­
est practical path (fig. 2b). With the length of the elec­
trical circuit inside the Battery reduced to a minimum,
the internal voltage drop is decreased resulting in im ­
proved performance, practicularly during engine cranking
at low temperatures.
Protection for the Battery charging circuit (10 gauge
wire) is provided by a pigtail lead which is a fusible
link off the battery positive cable (14 gauge wire).
A battery generally has two classifications of ratings:
(1) a 20 hour rating at 80°F and, (2) a cold rating at 0°F
which indicates the cranking load capacity. The Ampere-
Hour rating found on batteries was based on the 20 hour
rating. That is, a battery capable of furnishing three (3)
amperes for 20 hours while maintaining a specified aver­
age individual cell voltage would be classified as a 60
SECTION 6 Y

ENGINE ELECTRICAL

CONTENTS
B a t t e r y ..................................................................................................... 6 Y - l
C h a rg in g S y s te m ...................................................................................6Y-7
Ig n itio n S y s te m ......................................................................................6Y-15
S ta rtin g S y s t e m ...................................................................................6Y-23
Special T o o l s .........................................................................................6Y-26

BATTERY

IN D E X
Page
GENERAL DESCRIPTION
The
Page
Test P r o c e d u r e s ......................................................................................6Y-5
V isua l In s p e c t io n ............................................................................... 6Y-5
I n s t r u m e n t ..................................... ...................................................... 6Y-5
F u ll Charge H y d ro m e te r T e s t .................................................... 6Y-5
L o ad T e s t ...............................................................................................6Y-5
Specific G ra v ity R e a d in g s ............................................................. 6Y-6
C e ll C o m p a riso n T e s t ...................................................................... 6Y-6
In s ta llin g B a t t e r y ...................................................................................6Y-6
F ig- lb—
Page
Battery
10-30 CHEVROLET TRUCK SERVICE MANUAL