2-46. OPERATING TRUCK IN EXTREME HEAT.
When operating truck in very hot temperatures of above 100
degrees F (38 degrees C), extra care must be taken to prevent
overheating engine (temperatures over 230 degrees F [110
degrees C]) and transmission (temperatures over 250 degrees F
[121 degrees C]). Watch water and transmission temperature
Check oil levels often and keep operating temperatures as low
as possible. Truck cooling and lubrication systems support each
other. Failure of one system may rapidly cause failure of other
Keep operating temperature as low as possible.
Put the transmission range selector (1) in Neutral (N) position while
engine is running. Let the engine idle for about two minutes before
shutting down. Idling will cool the engine faster than quick shutdown
and may prevent damage from remaining engine heat.
Use low gear ranges only when necessary.
Stop the truck for cooling off periods. Idle engine as often as possible.
Check the oil levels often. Oil seals are more likely to leak in extreme hot