TM-9-2320-272-23-2

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-2 - Page 322 of 1417

NG81: BATTERY TESTS - Continued

STEP

8.

Are all batteries OK?

CONDITION/INDICATION

Have all batteries been tested?

DECISION

YES - If all batteries are OK and engine does not crank. Engine is tight. Notify supervisor.

NO - Perform test on next battery. Go to Step (1).

STEP

9.

Check battery condition.

a.

Check electrolyte level.

b.

Clean battery terminals.

NOTE

If battery fails in freezing weather, crank engine for 5 seconds and retest. This will warm

battery slightly.

c.

Refer to TM 9-6140-200-14 to check battery specific gravity.

d.

Charge battery, if necessary.

NOTE

If battery has been charged and battery resistance change is still greater than the limit,

battery is faulty.

e.

Retest battery, go to Step (1).

CONDITION/INDICATION

Does battery pass test?

DECISION

YES - Rerun Go-Chain test to verify problem is solved and no other problem exist.

NO - Replace battery (WP

0346). After repair, rerun Go-Chain test to verify problem is solved and no other

problems exist.

END OF WORK PACKAGE

TM 9-2320-272-23-2

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