Testing - Taylor-Dunn SS-025-34 Operation, Maintenance, And Replacement Parts Manual

TESTING

•
Explosive mixtures of Hydrogen gas are
present within battery cells at all times. Do not
work with or charge battery in an area where
open flames (including gas furnace or water
heater pilots), sparks, cigarettes, or any other
sources of combustion are present. Always
provide ample ventilation in rooms where
batteries are being charged. Failure to do so
may result in severe bodily injury and/or
property damage.
•
A battery is a live electrical source. It cannot
be disconnected or neutralized. Do not drop any
tool or conductive object onto the battery. A
conductive object that comes in contact with
the battery terminals will initiate a short circuit
of the battery. This could cause the battery to
explode resulting in severe bodily injury and/
or property damage.
•
Battery electrolyte is poisonous and
dangerous. It contains sulfuric acid. Avoid
contact with skin eyes or clothing. Wear rubber
gloves and safety glasses while servicing
batteries. DO NOT INGEST! This may result in
severe bodily injury.
Battery electrolyte will stain and corrode most
surfaces. Immediately and thoroughly clean
any surface outside of the battery that the
battery electrolyte comes in contact with.
Failure to clean may result in property damage.
Maintenance, Service, and Repair
Specific Gravity
NOTE: The battery must be fully charged before
performing this test.
The specific gravity of a cell is an indication of the actual
state of charge of the cell. A fully charged cell should
have a reading of 1275 to 1300 (see the illustration to
the right). A discharged cell will read 1100. Ideally, all
cells in a battery will have the same reading. Any cells
in a battery that vary by more than 30-points may be an
indication of a bad cell.
Clean the battery. Refer to
information on cleaning the battery.
Using part number 77-200-00 hydrometer, check and
record the specific gravity of each cell in the battery.
If, after charging, none of the cells exceed a hydrometer
reading of 1250 then there may be a fault in the charging
system. If the charging system checks OK then the
battery is no longer accepting a charge and should be
replaced.
NOTE: Refer to Charger Troubleshooting for
information on checking the charging system.
The highest reading will be the cell that is accepting the
most charge. This reading will be used to gauge all other
cells.
Compare the specific gravity readings to the highest
reading, if the difference between any of the cells is more
than 30-points, then that battery should be replaced.
NOTE: Individual cells in some industrial batteries
can be replaced. Contact the battery
manufacturer for more information.
Cleaning
section for
Typical
Hydrometer
Float
Battery
Page 3