Charging - Taylor-Dunn SC-090-24 Operation, T Roubleshooting And Replacement Parts Manual

Maintenance, Service, and Repair
Specific Gravity Test
Note: The batteries 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 battery will read 1100. Ideally, all
cells in a battery pack will have the same reading. Any
cells in a battery pack that vary by more than 30-points
may be an indication of a bad cell.
Clean the batteries. Refer to
section for information on cleaning the batteries.
Using part number 77-200-00 hydrometer, check and
record the specific gravity of each cell in the battery pack.
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
batteries are 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: If the batteries are over one year old, it is
recommended to replace them as a set.
Reconnect the batteries, remove the blocks from the
wheels and test drive.
Typical Hydrometer Float
Batteries
Page 4
Cleaning the Batteries

CHARGING

Charging Your Vehicle
Refer to
Rules and Operating Instructions
Safety
in section
.