Chevrolet 30 Series 1967 Service Manual page 351

F ig . 4b —V ie w inside V ent W e ll Showing Electro lyte
COMMON CAUSES OF FAILURE
Since the Battery is a perishable item which requires
periodic servicing, a good maintenance program will
insure the longest possible Battery life. If the Battery
tests good but fails to perform satisfactorily in service
for no apparent reason, the following are some of the
more important factors that may point to the cause of
the trouble.
1. Vehicle accessories inadvertently left on overnight
to cause a discharged condition.
2. Slow speed driving of short duration, to cause an
undercharged condition.
3. A vehicle electrical load exceeding the generator
capacity.
4. Defect in the charging system such as high re s is­
tance, slipping fan belt, faulty generator or voltage
regulator.
Fig . 5b—C u t- A w a y V ie w Showing Electro lyte at Proper
Le ve l, with Indicator Having Dark Appearance
below the split vent, additional electrolyte should be
added. NEVER ADD WATER TO THE ELECTROLYTE
WHEN ACTIVATING BATTERY.
Long and trouble-free service can be anticipated only
if the Battery is properly activated. Improper activation
results in poor performance and short Battery life.
After electrolyte has been added to a "dry charge"
Battery, it then becomes a wet charged Battery and
should be maintained in the same manner as any other
"w et" Battery.
WET CHARGED BATTERIES
Wet charged Batteries contain fully charged elements
and are filled with electrolyte before being shipped from
the factory.
PERIODIC SERVICING
5. Battery abuse, including failure to keep the Battery
top clean, cable clamps and posts clean and tight,
and improper addition of water to the cells.
LEVEL INDICATOR
The Battery features an electrolyte level indicator,
which is a specially designed vent plug with a trans­
parent rod extending through the center (fig. 5b). When
the electrolyte is at the proper level, the lower tip of the
rod is immersed, and the exposed top of the rod will ap­
pear very dark; when the level falls below the tip of
the rod, the top will glow.
The Indicator reveals at a glance if water is needed,
without the necessity of removing the vent plugs (fig.
The Level Indicator is used in only one cell (second
cell cap from positive Battery post) because when the
electrolyte level is low in one cell, it is normally low
Fig . 6b—C u t-A w ay V ie w Showing Electro lyte a t Low
INDICATOR
I
ELECTROLYTE LEVEL
LOW
Lever, with Indicator Having Light Appearance
ENGINE-ELECTRICAL 6Y-3
b).
6
CHEVROLET TRUCK SERVICE MANUAL