Driving
Condition
Load
Turbo-
charger
Tempera-
ture
Idle Time
(min.) Be-
fore En-
gine Shut-
down
Stop and
Go
Empty Cool Less than
One
Stop and
Go
Medium One
Highway
Speeds
Medium Warm Two
City Traffic Maximum
GCWR
Three
Highway
Speeds
Maximum
GCWR
Four
Uphill
Grade
Maximum
GCWR
Hot Five
NOTE: Under certain conditions the engine fan will run
after the engine is turned off. These conditions are under
high load and high temperature conditions.
Cooling System Tips – Automatic Transmission
To reduce potential for engine and transmission over-
heating in high ambient temperature conditions, take the
following actions:
• City Driving —
When stopped, shift the transmission into NEUTRAL
and increase engine idle speed.
• Highway Driving —
Reduce your speed.
• Up Steep Hills —
Select a lower transmission gear.
• Air Conditioning —
Turn it off temporarily.
44 STARTING AND OPERATING
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