operators_manual

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.
How to inspect and
replace a fuse
Use these steps to find blown electrical
fuses or polyswitches.
Turn the ignition off and turn all lights off.
Locate the fuses in either the cab, sleeper
or main power fuse box.
All the electrical circuits have fuses to
protect them from a short circuit or
overload. If something electrical on your
chassis stops working, the first thing you
should check for is a blown fuse.
WARNING
Do not replace a fuse with a fuse of a
higher rating. Doing so may damage
the electrical system and cause a fire.
Failure to comply may result in death,
personal injury, equipment or property
damage.
EMERGENCY - How to inspect and replace a fuse
44 Y53-6047-2HEN (03/18)
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