operators_manual

1. After you’ve started your engine,
idle it at approximately 600 rpm
while you check:
a. oil pressure
b. air pressure
c. alternator output
2. After a few minutes of idling at 600
rpm, increase your idle speed to
900 or 1,000 rpm. Continue your
warm-up. This procedure allows oil
to warm and flow freely while
pistons, liners, shafts, and bearings
expand slowly and evenly. In
extremely cold temperatures, you
may have to increase idle speed.
NOTE
In colder climates where the tempera-
ture is often below freezing, the warm-
up for turbocharged engines is espe-
cially important. Chilled external oil
lines leading to the turbocharger will
slow the oil flow until the oil warms, re-
ducing oil available for the bearings.
Watch the engine oil temperature or
pressure gauge for a warming trend
before increasing engine idle speed
(rpm).
3. Continue the engine warm-up until
the coolant temperature reaches at
least 130°F (54°C). At this
temperature, you can use partial
throttle. Wait until the coolant
temperature is at least 160°F
(71°C) before operating at full
throttle.
a. Under most circumstances,
idling your engine for long
periods merely wastes fuel. In
severe arctic weather
conditions, however, you may
need longer idling to be sure
all parts of your engine are
fully lubricated.
WARNING
Exhaust fumes from the engine con-
tain carbon monoxide, a colorless and
odorless gas. Do not breathe the en-
gine exhaust gas. A poorly maintained,
damaged or corroded exhaust system
can allow carbon monoxide to enter
the cab. Entry of carbon monoxide into
the cab is also possible from other ve-
hicles nearby. Failure to properly main-
tain your vehicle could cause carbon
monoxide to enter the cab, resulting in
death or personal injury.
WARNING
Never idle your vehicle for prolonged
periods of time if you sense that ex-
haust fumes are entering the cab. In-
vestigate the cause of the fumes and
correct it as soon as possible. If the
vehicle must be driven under these
conditions, drive only with the windows
open. Failure to repair the source of
the exhaust fumes may result in death,
personal injury, equipment or property
damage.
DRIVING - Starting and Warming Up
Y53-6047-2HEN (03/18) 131
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