operators_manual

Engine Warm Up
The purpose of engine warm-up is to allow
oil film to be established between pistons
and liners, shafts and bearings while your
engine gradually reaches operating
temperature.
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 temper-
ature is often below freezing, the
warm-up for turbocharged engines
is especially important. Chilled ex-
ternal oil lines leading to the turbo-
charger will slow the oil flow until the
oil warms, reducing oil available for
the bearings. Watch the engine oil
temperature or pressure gauge for a
warming trend before increasing en-
gine 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 engine 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 vehicles nearby.
Failure to properly maintain your ve-
hicle could cause carbon monoxide
to enter the cab, resulting in death
or personal injury.
WARNING!
Never idle your vehicle for pro-
longed periods of time if you sense
that exhaust fumes are entering the
cab. Investigate the cause of the
fumes and correct it as soon as pos-
sible. 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 dam-
age.
DRIVING - Starting and Warming Up
98 Y53-6096-1A1 (01/17)
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