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TM 5-4210-220-12
4-24. ELECTRICAL SYSTEM - Continued
4-24.12 Battery.
This task covers
a.
Test
b.
Replacement
TOOLS
MATERIALS/PARTS
Shop Equipment, Automotive
1980514 Battery
Maintenance and Repair,
NSN 4910-00-754-0650
EQUIPMENT CONDITION
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
NOTE
Truck batteries are of the no-maintenance type. Do not attempt to add water to the battery cells.
TEST
(1)
Be sure battery is fully charged, cell Indicator
should be green. If cell indicator is a light or
yellow color, electrolyte level is low and battery
should be replaced. If indicator is dark, battery
needs charging.
(2)
If battery needs charging connect 12 volt, 10
amp source to plugs in rear hose body and
charge for at least 24 hours.
CAUTION
Using an alligator clamp to connect loads to battery
will damage battery terminals. Connect leads to
battery with bolted cable ends and use switch to
connect/disconnect loads.
(3)
Connect a 290 amp load across the battery
terminals for 15 seconds to remove surface
charge (This is equivalent to a 0.041 ohm, 4 kw
rated resistor or carbon pile).
(4)
Wait 15 seconds after above test. Then
connect
a
voltmeter
across
the
battery
terminals. Switch the 290 amp load across the
battery terminals again. Read the voltage after
15 seconds.
(5)
Disconnect load.
4-456
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