operators_manual

WARNING
Removing the fill cap on a hot engine
can cause scalding
coolant to spray
out and burn you badly. If the engine
has been in operation within the previ-
ous 30 minutes, be very careful in re-
moving the fill cap. Protect face,
hands, and arms against escaping flu-
id and steam by covering the cap with
a large, thick rag. DO NOT try to re-
move it until the surge tank cools down
or if you see any steam or coolant es-
caping. In any situation, remove the
cap very slowly and carefully. Be ready
to back off if any steam or coolant be-
gins to escape.
NOTE
Keep the engine running at idle speed
unless
a
warning
icon turns on and re-
quires an engine to be shut off.
CAUTION
Prolonged periods of idling after the
engine has reached
operating temper-
atures can decrease engine tempera-
ture and could
cause engine damage
from inadequate lubrication. The nor-
mal torsional vibrations generated can
also cause transmission wear. An idle
shutdown feature, available on PAC-
CAR engines, can be programmed to
shut the engine down after a period of
low idle operation with no driver activi-
ty. A flashing warning lamp will inform
the driver of an impending shutdown.
Failure to comply may result in equip-
ment or property damage.
CAUTION
If the truck is equipped with power
take off (PTO) equipment, the engine
shutdown system can be deactivated
when the PTO is operational; however,
engine idle periods should not exceed
five minutes whenever possible. Fail-
ure to comply may result in equipment
or property damage.
2. Check to ensure the Oil Pressure
Gauge reads normal.
3. Make sure the engine fan is turning
by switching the Engine Fan Switch
from AUTO to MAN (Manual).
4. Increase the engine speed to about
one-half of full operating speed, or
1,100 to 1,200 rpm, maximum for 2
or 3 minutes.
5. Return the engine speed to normal
idle. Monitor the engine
temperature. After the temperature
returns to normal, allow the engine
to idle 3 to 5 minutes before
shutting it off. This allows the
engine to cool gradually and
uniformly
.
6. If overheating came from severe
operating conditions, the
temperature should have cooled by
this time. If it has not, stop the
engine and let it cool before
checking to see if the coolant is
low.
7. Be sure the vehicle is parked on
level ground or the readings may
be incorrect. Check the coolant
level at the cooling module surge
tank.
Check the coolant level after each trip
when the engine has cooled. The coolant
level should be visible within the surge tank
—add coolant if necessary.
ENGINE OPERATION - Emergency - What To Do If
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