OPERATION IN EXTREME HEAT (Contd)

TM 9-2320-386-10

2-34. OPERATION IN EXTREME HEAT (Contd)

(5) If engine overheating occurs:

NOTE

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

closed.

(a)

Park vehicle, allowing engine to idle.

CAUTION

If engine temperature continues to rise or does not show signs of

decreasing after two minutes of idling, shut down engine and

refer to troubleshooting (table 3-1).

(b) Observe engine coolant temperature gauge (2), transmission oil tem-

perature gauge (5), and engine oil pressure gauge (4) for indications that engine or

transmission is steadily cooling.

(c) Shut off engine when engine coolant temperature reaches normal

operating temperature of 160-230F (71-110C) as indicated by engine coolant

temperature gauge (2).

(d) Perform troubleshooting procedures as listed in table 3-1, after

engine has cooled to normal operating temperature of 160-230F (71-110C).

.WARNING.

Extreme care should be taken when removing surge tank filler cap

if temperature gauge reads above 160F (71C). Steam or hot

coolant under pressure will cause injury.

2-85