Electrical System -807640171

101

TM 9-2320-312-24-2

Testing and Adjusting Section

Electrical System

i01665449

Battery - Test

SMCS Code: 1401-081

Most of the tests of the electrical system can be

done on the engine. The wiring insulation must be

in good condition. The wire and cable connections

must be clean, and both components must be tight.

Never disconnect any charging unit circuit or bat-

tery circuit cable from the battery when the charg-

ing unit is operated. A spark can cause an explo-

sion from the flammable vapor mixture of hydro-

gen and oxygen that is released from the elec-

g00283565

Illustration 90

trolyte through the battery outlets. Injury to per-

sonnel can be the result.

4C-4911 Battery Load Tester

Use the 4C-4911 Battery Load Tester or the

The battery circuit is an electrical load on the

177-2330 Battery Analyzer in order to test a battery

charging unit. The load is variable because of the

that does not maintain a charge when the battery

condition of the charge in the battery.

is active. The 4C-4911 Battery Load Tester or the

177-2330 Battery Analyzer is a portable unit. The

NOTICE

4C-4911 Battery Load Tester or the 177-2330

The charging unit will be damaged if the connections

Battery Analyzer can be used under field conditions

between the battery and the charging unit are broken

and under high temperatures. The tester can be

while the battery is being charged. Damage occurs

used to load test all 6, 8, and 12 Volt batteries. This

because the load from the battery is lost and because

tester has two heavy-duty load cables that can

there is an increase in charging voltage. High voltage

easily be fastened to the battery terminals. A load

will damage the charging unit, the regulator, and other

adjustment knob is located on the top of the tester.

electrical components.

The load adjustment knob permits the current that

is being drawn from the battery to be adjusted to a

maximum of 1000 amperes. The tester is cooled by

an internal fan that is automatically activated when

a load is applied.

The tester has a built-in LCD. The LCD is a digital

voltmeter. The LCD is a digital meter that will

also display the amperage. The digital voltmeter

accurately measures the battery voltage at the

battery through wires for tracing. These wires are

buried inside the load cables. The digital meter,

that displays the amperage, accurately displays the

current that is being drawn from the battery which

is being tested.

Note: Refer to Operating Manual , SEHS9249 for

g00859857

Illustration 89

detailed instruction on the use of the 4C-4911

177-2330 Battery Analyzer

Battery Load Tester. Refer to Operating Manual ,

NEHS0764 for detailed instruction on the use of the

177-2330 Battery Analyzer. See Special Instruction,

SEHS7633, "Battery Test Procedure" for the correct

procedures to use when you test the battery. This

publication also contains the specifications to use

when you test the battery.