TM-9-2320-361-10

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

OPERATOR'S MANUAL

DECEMBER 1988

TM-9-2320-361-10 - Page 247 of 392

TM 9-2320-361-10

2-37. OPERATION IN EXTREME HEAT (Contd)

(4)

Frequently check temperature gage (2) and oil pressure gage (1). Engine is

overheating if one or more of the following conditions exist:

(a)

Engine coolant temperature is more than 210°F as indicated by

temperature gage (2).

(b)

Engine oil pressure drops below 10 psi with engine at idle as indicated

by oil pressure gage (1).

(5)

If engine overheating occurs:

Do not raise hood. Engine will cool faster at idle with hood

closed, Raising hood may result in engine damage from

prolonged overheating.

NOTE

Radiator fan and engine coolant will begin lowering engine

temperature a few minutes after vehicle stops.

(a)

Park vehicle, allowing engine to idle. Refer to para. 2-17.

CAUTION

If engine temperature continues to rise or does not show

signs of decreasing after two minutes of idling, stop engine

(refer to para. 2-17) and perform troubleshooting procedures

(refer to table 2-1).

(b)

Observe temperature gage (2) and oil pressure gage (1) for signs that

engine is steadily cooling.

(c)

Stop engine (refer to para. 2-17) when engine temperature reaches

normal operating range of 180°F to 200°F as indicated by temperature gage (2).

(d)

Perform troubleshooting procedures. Refer to table 3-1.

2-186