Section 11
ELECTRICAL SYSTEM
Subsection 02
(CHARGING SYSTEM)
SMR2002-085_11_02A.FM
11-02-7
The time required to charge a battery will vary de-
pending on some factors such as:
– Battery temperature: The charging time is in-
creased as the temperature goes down. The
current accepted by a cold battery will remain
low. As the battery warms up, it will accept a
higher rate of charge.
– State of charge: Because the electrolyte is near-
ly pure water in a completely discharged battery,
it cannot accept current as well as electrolyte.
This is the reason the battery will not accept
current when the charging cycle first begins. As
the battery remains on the charger, the current
from the charger causes the electrolytic acid
content to rise which makes the electrolyte a
better conductor and then, the battery will ac-
cept a higher charging rate.
– Type of charger: Battery chargers vary in the
amount of voltage and current that they can
supply. Therefore, the time required for the bat-
tery to begin accepting measurable current will
also vary.
Charging a Very Flat or Completely Discharged
Battery
The battery charger should have an adjustable
charging rate. Variable adjustment is preferred,
but a unit which can be adjusted in small incre-
ments is acceptable.
The battery charger must be equipped with an am-
meter capable of accurately measuring current of
less than 1 ampere.
Unless this procedure is properly followed, a good
battery may be needlessly replaced.
– Measure the voltage at the battery posts with
an accurate voltmeter. If it is below 10 volts, the
battery will accept current at very low rate, in
term of milliamperes, because electrolyte is
nearly pure water as explained above. It could
be some time before the charging rate increas-
es. Such low current flow may not be detect-
able on some charger ammeters and the bat-
tery will seem not to accept any charge.
– Exceptionally for this particular case, set the
charger to a high rate.
NOTE:
Some chargers have a polarity protection
feature which prevents charging unless the charg-
er leads are connected to the correct battery ter-
minals. A completely discharged battery may not
have enough voltage to activate this circuitry, even
though the leads are connected properly. This will
make it appear that the battery will not accept a
charge. Follow the charger manufacturer’s instruc-
tion on how to bypass or override this circuitry
so that the charger will turn on and charge a low-
voltage battery.
– Since the battery chargers vary in the amount
of voltage and current they provide, the time
required for the battery to accept measurable
charger current might be up to approximately
10 hours or more.
– If the charging current is not up to a measurable
amount at the end of about 10 hours, the bat-
tery should be replaced.
– If the charging current is measurable before the
end or at the end of about 10 hours, the battery
is good and charging should be completed in
the normal manner as specified in ACTIVATION
OF A NEW BATTERY.
– It is recommended that any battery recharged
by this procedure be load tested prior to return-
ing it to service.
Battery Installation
Proceed as follows:
1. Install battery in its emplacement.
2. Secure vent line to the battery and support. En-
sure vent line is not kinked or obstructed.
3.
First
connect RED positive cable.
4. Connect BLACK negative cable
last
.
5. Apply dielectric grease on battery posts.
6. Verify cable routing and attachment.
Reinstall seat support.
WARNING
Always charge battery in a well ventilated area.
WARNING
Always connect battery cables exactly in the
specified order, RED positive cable first BLACK
negative cable last.
WARNING
Vent line must be free and open. Avoid skin con-
tact with electrolyte.
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