Fiat 411 R Service Manual page 59

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Refitting and removing from tractor.
Therefore a battery may he considered charged if
the electrolyte gravity reads between 1,28-7,24 at
25° C g'77° F). Avoid letting the battery to discharge
cornpletely; recharging should be made when grarity
is not less than 1,16' (20° at). The recharging current
rate should never exceed 6 A.
in order to rnaintain the battery charging within
actual conditions the checks should not be made
when:
I. the electrohrte is clifierent from the prescribed one.
if distilled water is being poured in, take time to
set a uniform distribution,'
2. battery is hot, or immediately after repeated
startings, or when electrolyte is cold. The most
suitable temperature is between 15° and 25° C
(59-77F). .
if the battery cells have a specific gravity with dif-
ferences exceeding 0.02 or high or low gravities,
accompanied by excess of heat (more than 10° C -
50° F, above the ambient temperature), call the
Service Organization of the battery supplier.
During operation, the batteries are not to he perio~
dically recharged, as the tractor charging plant can
maintain their efiiciency.
When discharged (excluding after long tractor stops
which cause battery self-discharge), the batteries
indicate abnormal functional conditions.
These may he traced to:
.1. Faulty recharging system (generator, regulator
group): see service instructions.
2. Current dispersion, due to insulation clefacts in
the electric system. This may take place after
heavy current draw due to the insertion of extra
accessories, A rapid check is made by inserting
a microarnmeter between battery positive terminal
and its disconnected clamp, after having stopped
the engine and excluded all equipment. The
current rate should not exceed l miliiarnpere.
3. Extra accessories in addition to the standard ones
installed by the manufacturer are dependent upon
the electric system capacity.
4. Tractor short hauls, using gears at low
speeds and with frequent stops.
To maintain the generator at its normal recharg-
ing speed rate, use low gears when running at
low speeds.
5. Sulphated battery; short circuited elements, or
interrupted.
No difficulty should be met in installing or removing
the battery from tractor; to avoid heavy discharges,
he sure to disconnect the grounding cable, before
working, in addition use proper wrenches, and
never use pliers to screw or to unscrew the terminals.
109