Crown C48-2+2 Owner's Manual And Service Manual page 32

OPERATION AND SERVICE INFORMATION
A battery being charged will 'gas' with the majority of the gassing taking place at the end of the charging
cycle. This gas is hydrogen which is lighter than air. Water and sulfuric acid droplets will be carried out of the
battery vents by the hydrogen gas; however, this loss is minimal. If the battery electrolyte level is too high,
the electrolyte will block the vent tube and the gas will force it out of the vent tube and battery cap. The water
will evaporate but the sulfuric acid will remain where it can damage vehicle components and the storage
facility floor. Sulfuric acid loss will weaken the concentration of acid within the electrolyte and reduce the
life of the battery.
Over the life of the battery, a considerable amount of water is consumed. It is important that the water used be
pure and free of contaminants that could reduce the life of the battery by reducing the chemical reaction. The
water must be distilled or purified by an efficient filtration system. Water that is not distilled should be
analyzed and if required, filtration installed to permit the water to
meet the requirements of the water purity table (Ref Fig.17).
Fig.17 Water Purity Table
Even if the water is colorless, odorless, tasteless and fit for drinking, the water should be analyzed to see that
it does not exceed the impurity levels specified in the table.
Battery Cleaning
CAUTION
To prevent battery damage, be sure that all battery caps (if equipped) are tightly installed.
To reduce the possibility of damage to vehicle or floor, neutralize acid before rinsing battery.
To reduce the possibility of damage to electrical components while cleaning, do not use a pressure
washer.
Cleaning should take place per the Periodic Service Schedule (Ref. Fig. 16).
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Owner's Manual and Service Guide