TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 179 of 1207
TM 9-2320-361-20
Table 2-4. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. BATTERIES NOT CHARGING PROPERLY (GENERATOR IN YELLOW OR RIGHT-HAND RED)
NOTE
If STE/ICE is available, perform NG50 - charging circuit tests
(chapter 2, section VII).
Test 1. Check for loose or missing alternator belts.
a. Adjust loose belts (para. 4-2).
b. Replace broken or missing belts (para. 4-2).
Test 2. Test battery voltage.
NOT E
Battery voltmeter located on instrument panel is not always
accurate and should not be used to adjust voltage. Indicator needle
in voltmeter located on instrument panel should cover the white dot
at edge of green area when battery voltage is 28.0 ± 0.2 Vdc.
If voltage across batteries cannot be adjusted to 28.0 ± 0.2 Vdc, go to malfunction 4, test 3 and
check voltage.
END OF TESTING!
6. BATTERIES HOT OR BOILING, CORRECTED SPECIFIC GRAVITY OF ALL CELLS IS 1.280
NOTE
If STE/ICE is available, perform NG50 - charging circuit tests
(chapter 2, section VII).
Test charging voltage (malfunction 4, test 2).
END OF TESTING!
7. BATTERIES USE EXCESSIVE WATER
NOTE
If STE/ICE is available, perform NG81 - battery tests or NG50 -
charging circuit tests (chapter 2, section VII).
Test charging voltage (malfunction 4, test 2).
END OF TESTING!
8. BATTERIES RUN DOWN IN OPERATION
NOTE
If STE/ICE is available, perform NG50 - charging circuit tests
(chapter 2, section VII).
Test 1. Check for loose or missing alternator belts.
a. Adjust loose belts (para. 4-2).
b. Replace missing belts (para. 4-2).
Test 2. Test charging voltage (malfunction 4, test 2).
NOTE
If proper voltage is indicated, problem is not in charging system.
Refer to battery system troubleshooting (malfunction 1).
END OF TESTING!
2-94
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