Battery Charging
CAUTION
To minimize possible damage to the battery and allow
the battery to be fully charged, the slow charging meth-
od is presented here. This charging method can be ac-
complished with a constant current battery charger
which is available in most shops.
Do not charge a frozen battery because it can ex-
plode and cause injury. Let the battery warm to
60oF (15.5o C) before connecting to a charger.
Chargebatteryinawell--ventilatedplacetodissi-
pate gases produced from charging. These
gases are explosive.
CAUTION
Keep open flame and electrical spark away from
the battery. Do not smoke. Unplug the charger
from the electrical outlet before connecting or
disconnecting thecharger leadsfromthebattery
posts.
Follow the battery charger manufacturer’s
instructions when using a battery charger.
NOTE: Using specific gravity of the battery cells is the
most accurate method of determining battery condition.
Nausea may result if the gases are inhaled.
1.
open specific gravity or circuit voltage.
Determine the battery charge level from either its
3.
Follow the battery charger manufacturer’s in-
structions. Connect charger cables to the battery.
Make sure a good connection is made.
Battery Charge
Level
Specific
Gravity
Open Circuit
Voltage
4.
manufacturer’s instructions.
Charge the battery following the battery charger
100%
75%
50%
25%
0%
1.265
1.225
1.190
1.155
1.120
12.68
12.45
12.24
12.06
11.89
5.
electrolyte. If the temperature exceeds 125oF (51.6oC)
Occasionally check the temperature of the battery
or the electrolyte is violently gassing or spewing, the
charging rate must be lowered or temporarily stopped.
2.
tery charger manufacturer’s instructions or the fol-
lowing table.
Determine the charging time and rate using thebat-
6. Three(3)hours priortotheendofthecharging,mea-
sure the specific gravity of a battery cell once per hour.
The battery is fully charged when the cells are gassing
freely at a low charging rate and there is less than a
0.003 change in specific gravity for three (3) consecu-
tive readings.
Battery
Reserve
Capacity
(Minutes)
Battery Charge Level
(Percent of Fully Charged)
75%
50%
25%
0%
Battery Storage
80
or
3.8 hrs 7.5 hrs 11.3 hrs 15 hrs
If the vehicle will be stored for more than 30 days, re-
move the battery and charge it fully. Either store it on the
shelf or on the vehicle. Leave the cables disconnected
if it is stored on the vehicle. Store the battery in a cool
atmosphere to avoid quick deterioration of the charge in
the battery. To prevent the battery from freezing, make
sure it is fully charged.
less
@
@ @ @
3 amps 3 amps 3 amps
3
amps
81
to 125 5.3 hrs 10.5 hrs 15.8 hrs 21 hrs
@
amps
@ @ @
4 amps 4 amps 4 amps
4
126
170
to
5.5 hrs
@
11 hrs
@
5 amps 5 amps 5 amps
16.5 hrs 22 hrs
@ @
5
amps
171
to
5.8 hrs 11.5 hrs 17.3 hrs 23 hrs
250
@
@ @ @
6 amps 6 amps 6 amps
6
amps
above
250
6 hrs
12 hrs 18 hrs 24 hrs
@ @ @
amps 10 amps 10 amps 10 amps
@
10
Electrical System
Page 6 -- 28
Workman MD/MDX
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