Chevrolet CHEVY VAN G10 SERIES Service Manual page 215

E NG INE ELEC TR IC A L 6Y-4
Fig. 6b —Charging Lead Adapters
exceed 125°F . If spewing o f electrolyte occurs, or if electro­
lyte tem perature exceeds 125° F ., the charging rate in am peres
m ust be reduced or tem porarily halted to avoid damage to the
b attery.
T he b attery is fully charged w hen over a tw o-hour period at
a low charging rate in am peres all cells are gassing freely (n o t
spewing liquid electrolyte), and no change in specific gravity
occurs. The full charge specific gravity is
co rrected for electrolyte tem perature w ith the electrolyte level
at the split ring, unless electrolyte loss has occurred due to age
or overfilling in w hich case the specific gravity reading will be
low er. F or th e m ost satisfactory charging, the low er charging
rates in am peres are recom m ended.
I f after prolonged charging a specific gravity o f at least
1.230 on all cells cannot be reached, the b attery is n o t in an
o p tim u m c o n d i t i o n a n d
perform ance; how ever, it may continue to provide additional
1.260-1.280,
will n o t provide optim um
Fig. 7b —Testing Specific Gravity (Typical)
service if it has perform ed satisfactorily in the past.
An " em ergency b oo st charge," consisting of a high charging
rate for a short period o f tim e, m ay be applied as a tem porary
expedient in order to crank
procedure usually supplies insufficient b attery reserve to crank
a second and th ird tim e. T herefore, the " em ergency boost
charge" m ust be follow ed by a subsequent charging period of
sufficient duration to restore the b attery to a satisfactory state
o f charge. Refer to the charging guide in this section.
When o u t o f the vehicle, the sealed side term inal battery
will require adapters for the term inals to provide a place for
attach m en t o f the charging leads. A dapters are available
through local parts service.
When the sealed term inal b attery is in the vehicle, the studs
provided in th e wiring harness are suitable for attach m en t of
the charger's leads.
C A U T IO N : Exercise care when attaching charger
leads to side term inal studs to avoid contact w ith
vehicle metal components which would result in
damage to the battery.
an engine. However, this
C H E V Y V A N S H O P M A N U A L