Tennant 365, Operator'S Manual

Page: 73 / 102

MAINTENANCE
3-31
365 MM173 (3---90)
ELECTRICAL SYSTEM
BATTERY
The battery is rated at 12 V, 475 ccA. It is located
under the operator foot plate. When removing
battery cables, remove the negative (---) cable before
the positive (+) cable.
Do not allow the battery to remain in discharged
condition for any length of time. Do not operate the
machine if the battery is in poor condition or with
only 25% of charge left.
Clean the top surface and the terminals of the
battery periodically. Use a strong solution of baking
soda and water. Brush the solution sparingly over the
battery top, terminals, and cable clamps. Do not
allow any baking soda solution to enter the battery.
Use a wire brush to clean the terminal posts and the
cable connectors. After cleaning, apply a coating of
clear petroleum jelly to the terminals and the cable
connectors. Keep the top of the battery clean and
dry.
Keep all metallic objects off the top of the battery, as
they may cause a short circuit. Replace worn or
damaged wires.
The electrolyte level in regular non-sealed batteries
can be checked. It must always be above the battery
plates. Add distilled water to maintain solution at the
correct level above the plates, but do not overfill.
Never add acid to batteries, only distilled water. Keep
vent plugs firmly in place at all times, except when
adding water or taking hydrometer readings.
WARNING: Battery acid causes severe
burns. Avoid contact. Wash immediately
and get medical attention if contact occurs.
If when checking battery specific gravity, one or
more battery cells tests lower than the other battery
cells, (0.050 or more) the cell is damaged, shorted,
or is about to fail.
NOTE: Do not take readings immediately after adding
water --- if the water and acid are not thoroughly
mixed, the readings may not be accurate. Check the
hydrometer readings against this chart:
SPECIFIC GRAVITY BATTERY
at 80
_
F (27
_
C) CONDITION
1.260 --- 1.280 100% charged
1.230 --- 1.250 75% charged
1.200 --- 1.220 50% charged
1.170 --- 1.190 25% charged
1.110 --- 1.160 Discharged
NOTE: If the readings are taken when the battery
electrolyte is any temperature other than 80
_
F (27
_
C), the reading must be temperature corrected.
To determine the corrected specific gravity reading
when the temperature of the battery electrolyte is
other than 80
_
F (27
_
C):
Add to the specific gravity reading 0.004,
4 points, for each 10
_
F (5
_
C) above 80
_
F (27
_
C).
Subtract from the specific gravity reading
0.004, 4 points for each 10
_
F (5
_
C) below
80
_
F (27
_
C).