Paccar MX-11, Operator'S Manual

Page: 15 / 121

WARNING
To reduce the chance of personal in-
jury, vehicle damage, and/or death
from overheated engines, which can
result in a fire, never leave the engine
idling without an alert driver present. If
the engine does overheat, as indicated
by the engine coolant temperature
lamp, immediate action is required to
correct the condition. Continued unat-
tended operation of the engine, even
for a short time, may result in serious
engine damage or a fire. Failure to
comply may result in death, personal
injury, equipment or property damage.
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. Always remove the cap very
slowly and carefully. Be ready to back
off if any steam or coolant begins to
escape. Failure to comply may result
in death, personal injury, equipment or
property damage.
NOTE
Keep the engine running at idle speed
unless a warning icon turns on that re-
quires the engine to be shut off.
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. Idle the engine to see if this
reduces the coolant temperature. If
the temperature does not begin to
drop, shut off the engine and
contact your nearest authorized
dealer.
5. If the temperature begins to return
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 coolant 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.
Operating Instructions
Engine Warning Lamps
The following engine warning lamps
section covers only the lamps controlled by
the engine’s Electronic Control Module
(ECM). Please refer to the vehicle
“Operator's Manual” and “Engine
Aftertreatment Systems” manuals for
additional warning lamp information.
ENGINE OPERATION - Operating Instructions
Y53-1166-1M1 (10/2020) 13
1