TM 9-2320-272-10
2-34.
OPERATING IN EXTREME HEAT (Contd)
CAUTION
If engine temperature continues to rise or does not drop after two minutes of idling, shut
down engine and refer to trouble- shooting table 3-1.
(b)
Observe coolant temperature gauge (1), engine oil pressure gauge (3), and transmission oil
temperature gauge (2) for signs that engine or transmission is steadily cooling.
(c)
Shut off when engine coolant temperature gauge (1) reaches normal operating temperature of
175-200F (79 -93C
(d)
Perform troubleshooting procedures as listed in table 3-1.
Extreme care should be taken when removing surge tank filler cap if coolant temperature
gauge reads above 175°F (79°C). Steam or hot coolant under pressure will cause injury.
(e)
Place a thick cloth over surge tank filler cap (4). Carefully turn cap (4) counterclockwise to first
stop to allow pressure to escape.
(f)
Remove cap (4) when cooling system pressure is vented and check coolant level. Surge tank
should be filled approximately to bottom of filler neck.
(g)
Add engine coolant as required. Install surge tank filler cap (4) after filling and start engine (para.
2-12).
(h)
Proceed with operation. Report any overheating to unit maintenance upon completion of
operation.
d.
Stopping or Parking.
(1)
Park vehicle in a sheltered area, out of sun, if possible.
(2)
Check batteries after operation and service, as required.
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