9 ELECTRICAL SYSTEM
11790F90020
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11790F90030
Specific Gravity
State of Charge
1.260 Sp. Gr.
100
% Charged
1.230 Sp. Gr.
75 % Charged
1.200 Sp. Gr.
50
% Charged
1.170 Sp. Gr.
25
% Charged
1.140 Sp. Gr.
Very Little Useful Capacity
1.110 Sp. Gr.
Discharged
At an electrolyte temperature
of
20°C
(68
OF)
[2] STARTING SYSTEM
CHECKING
(1) Main Switch
82410 • 82710 • 82910 WSM,
12271
Battery Specific Gravity
1.
Check the specific gravity of the electrolyte
in
each cell with a
hydrometer.
2.
When the electrolyte temperature differs from that
at
which the
hydrometer was calibrated, correct the specific gravity reading
following the formula mentioned
in
(Reference).
3.
If the specific gravity is less than 1.215 (after
it
is
corrected for
temperature), charge or replace the battery.
4.
If
the specific gravity differs between any two cells by more than
0.05, replace the battery.
•
NOTE
• Hold the hydrometer tube vertical without removing it from
the electrolyte.
•
Do
not suck too much electrolyte into the tube.
• Allow the float to move freely and hold the hydrometer at
eye level.
• The hydrometer reading must be taken at the highest
electrolyte level.
(Reference)
• Specific gravity slightly varies with temperature. To
be
exact, the
specific gravity decreases by 0.0007 with
an
increase of
1°C
(0.0004 with
an
increase of 1
OF)
in
temperature, and increases
by 0.0007 with a decreases of 1
°C
(0.0004 with a decrease
of
1
OF).
Therefore, using
20°C
(68
OF)
as
a reference, the specific gravity
reading must be corrected by the following formula:
• Specific gravity at
20°C
= Measured value + 0.0007 x
(electrolyte temperature - 20
°C)
• Specific gravity at 68 of = Measured value + 0.0004 x
(electrolyte temperature -
68
°
F)
11790890040
Main Switch
1.
Remove the panel board.
2. Disconnect the 4P connector and remove the main switch
(1).
3. Perform the following checks.
(1) Main Switch
12270890070
9-S6
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