TM-9-2320-361-24-1

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2

AUGUST 2006

TM-9-2320-361-24-1 - Page 202 of 1176

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. STARTER MOTOR

OPERATES, BUT

ENGINE CRANKS

SLOWLY (Contd)

3. With engine stop control

handle pulled out, crank

engine for 30 seconds

(TM 9-2320-361-10). Voltage

reading should be 19 VDC or

more during cranking.

4. Disengage engine stop control

handle (TM 9-2320-361-10).

1. If battery voltage is not

satisfactory, go to WP 0012 00,

table 1, malfunction 1, test 1.

2. If battery voltage is satisfactory,

replace starter motor and solenoid

assembly (WP 0088 00).

If engine still cranks slowly, replace

batteries (WP 0127 00).

TM 9-2320-361-24-1

0012 00

0012 00-18

BATTERY AND CHARGING SYSTEM TROUBLESHOOTING (Contd)

Table 2. Starting System Troubleshooting Procedure (Contd).

CHARGING SYSTEM (60 AMP)

POWER

ACCESSORY

SWITCH

SLAVE

RECEPTACLE

POS

NEG

STARTER

RELAY

STARTER

SOLENOID

10

14

74A

74

27

27

1

11

25

49

50

6

2

68

7

1

214

568

74B

B

D

C

A

B

A

14

32

VOLTMETER

60-AMP

ALTERNATOR

STARTER

MOTOR

12-VOLT

BATTERY

15-AMP

HORN

CIRCUIT

BREAKER

INPUT FIELD VOLTAGE

+28 VDC OUTPUT

RH GROUND FRAME

START

SWITCH

D

C

BA