TM 9-2320-360-10
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
This section provides instructions to operate HET Tractor and its auxiliary equipment under extreme and
unusual conditions. Special maintenance instructions are provided for these conditions.
2-21. OPERATION IN EXTREME HEAT
CAUTION
When operating in temperatures above 100 F (38C), extra care
must be taken to prevent overheating engine (temperatures over
210 F (100C)), transmission (temperatures over 250F (121 C)),
and transfer case (temperatures over 250F (121 C))s. Watch
WATER TEMP gage, TRANS TEMP gage, and T-CASE TEMP gage
close.
Check oil levels often and keep operating strain to a minimum.
HET Tractor cooling and lubrication systems support each other.
Failure of one system will rapidly cause failure of other system.
Idling the engine cools the engine faster than quick shutdown
and may prevent damage from engine heat.
a. Keep engine operating strain to a minimum.
(1) Set transmission range selector to N (neutral) position while engine is running. Idle engine
for approximately 2 minutes before shutting engine down.
(2) Use low gear ranges only when necessary.
b. Check oil levels often. Oil seals are more likely to leak in extremely hot weather.
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