MAINTENANCE
7100 330690 (12--01)
62
Using a hydrometer, measure the specific gravity
to determine the charge level and condition of the
batteries. If one or more of the battery cells test
lower than the other battery cells (0.050 or more),
the cell is damaged, shorted, or is near failure.
Completely recharge the batteries, then retest
them.
NOTE: Do not take readings immediately after
adding distilled water. If the water and acid are not
thoroughly mixed, the readings may not be
accurate. Check the hydrometer readings against
the following chart to determine the remaining
battery charge level:
SPECIFIC GRAVITY
at 27
_
C (80
_
F)
BATTERY
CHARGE
1.265
100% Charged
1.223
75% Charged
1.185
50% Charged
1.148
25% Charged
1.110
Discharged
NOTE: If the readings are taken when the battery
electrolyte is any temperature other than 27
_
C
(80
_
F), the reading must be temperature
corrected. Add or subtract to the specific gravity
reading 0.004, 4 points, for each 6
_
C(10
_
F)
above or below 27
_
C(80
_
F).
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