DISTRIBUTION SYSTEMS - ELECTRICAL POWER SYSTEM
Battery - Check (A.30.A.83 - F.40.A.11)
435, 445, 445CT
A hydrometer is used to check the speci
fi
c gravity (weight) of the electrolyte. The speci
fi
c gravity is an indication of
the level of charge for each cell.
Hydrometers are made to show the correct speci
fi
c gravity when the temperature of the electrolyte is
26.7 °C 80 °F
).
When you check the speci
fi
c gravity, you must know the temperature of the electrolyte. If your hydrometer does
not have a thermometer, get a thermometer to check the temperature of the electrolyte. The thermometer must
indicate a high temperature of at least
52 °C 120 °F
).
NOTE:
To correctly test a battery, do each part of the battery test until you know the condition of the battery.
1.
Remove enough electrolyte from a cell so that the
fl
oat is free in the tube.
NOTE:
If the speci
fi
c gravity cannot be checked without
fi
rst adding water to the cell, the battery must be charged
for 15 minutes at 15 to 25 amperes to mix the water with
the electrolyte. Then check the speci
fi
c gravity.
2.
Read the
fl
oat.
3.
Read the thermometer. If the reading is above
26.7 °C (80 °F
) add speci
fi
c gravity points to the
reading for speci
fi
c gravity. If the reading is below
26.5 °C (80 °F
) subtract speci
fi
c gravity points from
the reading for speci
fi
c gravity. See the following
illustration and add or subtract speci
fi
c gravity points
as needed.
(1)
Temperature in F
(2)
Temperature in C
B790863
1
4.
Make a record of the corrected speci
fi
c gravity
reading for each cell.
5.
If the difference between the high reading and the
low reading is 0.050 or more, charge the battery and
check the speci
fi
c gravity again. If after charging,
the difference is still 0.050 or more, install a new
battery.
6.
The corrected speci
fi
c gravity reading shows the
level of charge for the cell. The level of charge must
be at least
75 %
in each of the cells. In maintenance
free batteries the level of charge is at least
75 %
if the corrected speci
fi
c gravity reading is 1.240 or
higher. In all other batteries the level of charge is at
least
75 %
if the corrected speci
fi
c gravity reading
is 1.230 or higher.
7.
If the difference between the high reading and the
low reading is less than 0.050, and the level of
change is at least
75 %
in all of the cells, do the
Capacity (Load) Test.
1 04/05/2005
A.30.A / 93
Summary of Contents for 435
Page 1: ...REPAIR MANUAL 435 445CT 445 6 75491 1 04 05 2005 ...
Page 3: ...INTRODUCTION 6 75491 1 04 05 2005 1 ...
Page 15: ...INTRODUCTION bs04e020_1 4 6 75491 1 04 05 2005 13 ...
Page 16: ...INTRODUCTION bs04e021_1 5 6 75491 1 04 05 2005 14 ...
Page 19: ...REPAIR MANUAL DISTRIBUTION SYSTEMS 435 445CT 445 39702 1 04 05 2005 A ...
Page 86: ...39703 1 04 05 2005 A 10 A 66 ...
Page 104: ...39704 1 04 05 2005 A 12 A 18 ...
Page 126: ...39705 1 04 05 2005 A 16 A 22 ...
Page 127: ...DISTRIBUTION SYSTEMS A ELECTRICAL POWER SYSTEM 30 A 435 445CT 445 39706 1 04 05 2005 A 30 A 1 ...
Page 237: ...DISTRIBUTION SYSTEMS A LIGHTING SYSTEM 40 A 435 445CT 445 39707 1 04 05 2005 A 40 A 1 ...
