Tennant 515, Operator'S Manual

Page: 55 / 84

MAINTENANCE
53
515 MM420 (10--96)
BATTERIES
The batteries are unique in that they hold their
power for long periods of time. The lifetime of the
batteries is limited by the number of charges the
batteries receive. To get the most life from the
batteries, charge them when all the battery
discharge indicator segments shut off (20%
charge left). Use an automatic charger with the
proper rating for the batteries.
Periodically clean the top surface of the batteries
and the terminals, and check for loose
connections. Use a strong solution of baking soda
and water. Brush the solution sparingly over the
battery tops, terminals, and cable clamps. Do not
allow any baking soda solution to enter the
batteries. Use a wire brush to clean the terminal
posts and the cable connectors. After cleaning,
apply a coating of clear battery post protectant to
the terminals and the cable connectors. Keep the
tops of the batteries clean and dry.
Keep all metallic objects off the top of the
batteries, which may cause a short circuit.
Replace any worn or damaged wires.
Check the electrolyte level in each battery after
charging, and every 50 hours of operation. Never
add acid to the batteries, only distilled water.
Always keep the battery caps on, except when
adding water or taking hydrometer readings.
Measuring the specific gravity, using a
hydrometer, is a way 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 about to fail.
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