operators_manual

CAUTION
If the truck is equipped with power
take off (PTO) equipment, the en-
gine shutdown system can be deac-
tivated when the PTO is operational;
however, engine idle periods should
not exceed five minutes whenever
possible. Failure to comply may re-
sult in equipment or property dam-
age.
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.
See Also
Engine - Coolant Temperature on page
66
Engine, Low Coolant Level on page 62
Engine, Coolant Temperature on page 62
Inspect Coolant Level on page 172
How to inspect and replace a fuse
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.
Turn the ignition off and turn all lights off.
Locate the fuses in either the cab, sleeper
or main power fuse box.
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, equip-
ment or property damage.
CAUTION
Never patch fuses with tin foil or wire. This
may cause serious damage elsewhere in
the electrical circuit, and it may cause a fire.
CAUTION
If a circuit keeps blowing fuses, have the
electrical system inspected for a short circuit
or overload by an authorized dealer as soon
as possible. Failure to do so could cause
serious damage to the electrical system
and/or vehicle.
EMERGENCY - Roadside Assistance
Y53-6096-1A1 (01/17) 33
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