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TM 5-4320-306-24
2-13. TEST/REPLACE/REPAIR BATTERY CABLE ASSEMBLIES, BATTERIES, AND CHARGING RECEPTACLE
(Continued)
3.
Remove filler cap (29) Using a hydrometer (30) check the specific gravity of the electrolyte. The specific gravity
of a fully charged battery must be 1.250 minimum at 80OF (260C). Measure the temperature of the battery electrolyte
with an accurate thermometer. Compare the electrolyte temperature and the hydrometer specific gravity reading to the
battery condition chart. Add or subtract (from your specific gravity reading) the decimal next to the temperature in
degrees F that closely approximates the obtained electrolyte temperature If the temperature corrected reading is below 1
250, charge the battery
WARNING
Leave filler caps Installed while battery Is being charged. Charge battery in a well-ventilated area.
Do not smoke or use open flame or spark-producing equipment In the vicinity of charging battery.
NOTE
The 6TN and 6TL batteries can be mixed or matched. However, maintenance-free batteries cannot
be mixed or matched with military batteries. Use an electrolyte with a specific gravity of 1.280.
4
If battery will not hold the charge, discard and replace with new battery. Add electrolyte to new battery and
charge before installation
5
Inspect terminal lugs (3, 7, and 11), screws (28), and nuts (2, 6, and 10) for corrosion. If corroded, clean with a
solution of baking soda and water Inspect screws and nuts for damaged threads Replace if damaged.
6
Inspect ends of cables (4, 8, and 12) for corrosion If corroded, clean with a solution of baking soda and water
2-36 Change 2
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