Shibaura ST329, Operator'S Manual

Page: 53 / 72

LUBRICATION AND MAINTENANCE
46
BATTERY
Keep the battery connections tight and free of cor-
rosion. An ammonia or baking soda-water solution
is good for washing the outside surface and termi-
nals of the battery. After cleaning, wash the battery
with clean water. Apply a small amount of petro-
leum jelly to the terminals to protect them from cor-
rosion.
In freezing temperatures, the battery must be
maintained in a good state of charge. When a bat-
tery is discharged or run down, the electrolyte is
weak and may freeze, causing damage to the
case.
The battery on model ST330 or ST333 is free of
maintenance.
There is not vent plug, but an indicator (Hydrome-
ter) on this battery. It is necessary daily to check
the indicator as the following.
Indicator (hydrometer) shows,
Green ; Good condition
···········
the level and gravity
of electrolyte are good
Dark (black) ; Necessary to charge
············
electrolyte is weak
White ; Change the battery
·····
discharged or run down
Never over charge the battery, it could cause
an explosion and the battery may be dis-
charged or run down.
Charge the battery within 10% of the rated 5.5
amps.
Determine the battery charge with checking the in-
dicator of battery.
WARNING
： ： ： ：
When the alternator is
charging, an explosive gas is produced
inside the battery. Therefore, always
check the indicator with the engine
stopped. Do not use an exposed flame
and do not smoke when checking the
battery indicator.
ALTERNATOR
The alternator, Figure 70 , is belt-driven from the
engine crankshaft pulley. It is important that belt
slippage does not occur, otherwise, the charging
rate will be affected. Details of belt adjustment are
given on page
43 .
Other than belt adjustment, the only maintenance
required on the alternator is to periodically inspect
the terminals and keep them clean and tight. The
alternator cooling fan should also be cleaned
periodically.
When working on or checking the alternator, com-
ply with the following precautions to prevent alter-
nator damage.
Figure 70 - Alternator
DO NOT, under any circumstances, short the
FIELD terminal of the alternator to ground.
DO NOT disconnect the alternator output lead
or battery cables while the alternator is oper-
ating.
DO NOT remove the alternator from the tractor
without first disconnecting the negative (
－
)
battery cable. If the battery is to be removed,
disconnect the negative cable first.
If a battery is being installed, MAKE CERTAIN