Table 4. Charging System (100 Amp) Troubleshooting Procedure - continued

TM 9-2320-361-24-1

0012 00

BATTERY AND CHARGING SYSTEM TROUBLESHOOTING (Contd)

Table 4. Charging System (100 Amp) Troubleshooting Procedure (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

CAUTION

1. NO ALTERNATOR

OUTPUT

Do not puncture waterproof cover on

cable between alternator and voltage

regulator to perform voltage checks.

The cable will be unserviceable.

7. Use multimeter to check

1. If battery voltage measures between

battery voltage. Normal

24.0 and 26.0 VDC and alternator has

charging on batteries is

very weak or no output, replace

28.0 0.2 VDC.

alternator (WP 0085 00).

2. If battery voltage measures between

26.0 and 30.0 VDC, adjust voltage

regulator (if equipped with adjustment

screw). If charging voltage across

batteries cannot be adjusted to 28.0

0.2 VDC, replace voltage regulator

(WP 0448 00).

3. If charging voltage across batteries

can be adjusted to 28.0 0.2 VDC., go

to test step 8.

8. Check voltage regulator

Go to WP 0012 00, table 2, malfunction 1,

stability.

test 2, step 7.

NOTE

2. BATTERIES NOT

CHARGING

If STE/ICE-R is available, perform

PROPERLY

NG 50 Charging Circuit Tests

(WP 0018 00).

1. Adjust loose belts (WP 0084 00).

Test 1. Check for loose or missing

alternator belts.

2. Replace broken or missing belts

(WP 0084 00).

Go to WP 0012 00, table 1, malfunction 1,

Test 2. Test battery voltage.

test 1.

NOTE

3. BATTERIES HOT OR

BOILING,

If STE/ICE-R is available, perform

CORRECTED

NG 50 Charging Circuit Tests

SPECIFIC GRAVITY

(WP 0018 00).

OF ALL CELLS IS

Test charging voltage (WP 0012 00,

Replace defective batteries as necessary

1.280

table 4, malfunction 1, test 2).

(WP 0127 00).

NOTE

4. BATTERIES USE

EXCESSIVE WATER If STE/ICE-R is available, perform

NG 50 Charging Circuit Tests

(WP 0018 00).

Test charging voltage (WP 0012 00,

Replace defective batteries as necessary

table 4, malfunction 1, test 2).

(WP 0127 00).

NOTE

5. BATTERIES RUN

DOWN IN

If STE/ICE-R is available, perform

OPERATION

NG 50 Charging Circuit Tests

(WP 0018 00).

Test 1. Check for loose or missing

1. Adjust loose belts (WP 0084 00).

alternator belts.

2. Replace broken or missing belts

(WP 0084 00).

Test 2. Test charging voltage

(WP 0012 00, table 4,

malfunction 1, test 2).

END OF WORK PACKAGE

0012 00-27/28 blank