ELECTRICAL TROUBLESHOOTING - continued - TM-9-2320-386-24-1-10094

TM 9-2320-386-24-1-1

0012 00

Electrical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

NOTE

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 5, test 3

and check voltage.

END OF TESTING!

7. BATTERIES HOT OR BOILING, CORRECTED SPECIFIC GRAVITY OF ALL CELLS IS 1.280

NOTE

If STE/ICE-R is available, perform NG50 Charging Circuit Tests

(WP 0017 00).

Test charging voltage (malfunction 5, test 2).

END OF TESTING!

8. BATTERIES USE EXCESSIVE WATER

NOTE

If STE/ICE-R is available, perform NG81 Battery Test or NG50

Charging Circuit Tests (WP 0017 00).

NOTE

If STE/ICE-R is available, perform NG81 Battery Test or NG50

Charging Circuit Tests (WP 0017 00).

9. BATTERIES RUN DOWN IN OPERATION

NOTE

If STE/ICE-R is available, perform NG50 Charging Circuit Tests

(WP 0017 00).

Test 1. Check for loose or missing fan drivebelt.

Adjust or replace fan drivebelt (WP 0084 00).

Test 2. Test charging voltage (malfunction 5, test 2).

NOTE

If proper voltage is indicated, problem is not in charging system.

Refer to battery system troubleshooting (malfunction 1).

END OF TESTING!

CHARGING SYSTEM (100 AMP)

10. NO ALTERNATOR OUTPUT (BATTERY GAUGE IN LEFT-HAND RED)

NOTE

If STE/ICE-R is available, perform NG50 Charging Circuit Test

(WP 0017 00).

Test 1. Check for loose alternator mounting or missing drivebelt.

a. Tighten loose mounting hardware.

b. Replace missing drivebelt (WP 0084 00).

Test 2. Test charging system output voltage.

0012 00-11