TM-9-2320-386-10

2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); OPERATOR’S MANUAL

JANUARY 1996

TM-9-2320-386-10 - Page 165 of 223

TM 9-2320-386-10

3-15

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Table 3-1. Troubleshooting (Contd).

SPECIAL PURPOSE KITS:

ARCTIC WINTERIZATION KIT

32. ENGINE FAILS TO REACH OPERATING TEMPERATURE

Check to see if radiator cover aperture flap is open (para. 2-43).

Roll flap down closed if open.

33. ENGINE TEMPERATURE EXCEEDS 230°F (110°C)

Check to see if radiator cover aperture flap is closed (para. 2-43).

Roll flap open and secure if closed.

34. FUEL BURNING PERSONNEL HEATER FAILS TO START WHEN RUN-OFF-

START SWITCH IS HELD IN START POSITION

WARNING

• Exhaust gases can kill. Do not operate engine coolant

heater in closed area occupied by personnel. Doing so

may result in injury to personnel.

• Do not perform fuel system checks or services while

smoking or near fire, flames, or sparks. Always keep

a fire extinguisher nearby. Fuel may ignite causing

injury to personnel.

NOTE

If RUN-OFF-START switch is turned to RUN posi-

tion before red indicator light illuminates, heater will

not operate.

Step 1. Press PRESS-TO-TEST button on heater control box to check opera-

tion of circuit.

If red indicator light does not illuminate, notify unit maintenance.

Step 2. Check to see if HI-LO switch on heater control box is set to HI.

Set HI-LO switch to HI.

Step 3. Check fuel level on fuel gauge.

Fill fuel tank if necessary (para. 1-16).

Step 4. Check to see if personnel heater shutoff cock is closed. Refer to

(para. 2-4).

Open personnel heater shutoff cock.

END OF TESTING!