When the electrolyte level drops, add distilled water to the appropriate jars up to the MAX mark. This must be done before the electrolyte falls below the MIN·mark.
Do not fill the electrolyte above the required level, otherwise the electrolyte will flow out through the vent. This can damage the paintwork and corrode the bodywork.
Check the voltage at the battery terminals with a voltmeter (see fig. 1.57).
Checking the density of the electrolyte in the battery should be done every 3 months in order to determine the load capacity of the battery.
Remove the caps from the battery cans.
The check is made by a density meter.
Dial the electrolyte into the density meter and use the scale on the float to determine its density (see fig. 1.58).
When determining the density of the electrolyte, the temperature of the battery must be taken into account. For electrolyte temperatures below 15°C, for every 10°C below this temperature, subtract 0.007 from the measured density. For every 10°C above 15°C, add 0.007.
The density of the electrolyte in the battery must be within the following limits.
Measure the density of the electrolyte in each jar. A density difference of 0.04 or greater between any two banks indicates electrolyte loss or plate sulfation.
If the electrolyte density between any two banks differs by more than 0.04, the battery must be replaced. If the density of the electrolyte is lower than required, but the same in all banks, the battery must be charged.
After topping up and checking the density of the electrolyte, tightly close the respective battery banks with stoppers.
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