Navistar WorkStar Series, Operator'S Manual

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Operation
8. To place the ignition switch in ACC (Accessory) position,
rotate key counterclockwise to the ACC position.
Accessory features can now be used without engine
operation.
9. To terminate ACC (Accessory) operation, rotate the key
clockwise to the OFF position.
After the Engine Starts
• Do not increase engine speed until the oil pressure gauge
indicates normal pressure.
• Make sure the engine oil pressure is indicated on the gauge
within 20 seconds after starting.
• Operate the engine for three to five minutes before operating
at full power.
• Try to limit engine idle to 10 minutes. Excessive idling
reduces fuel economy, and may decrease oil life.
• When starting a cold engine, increase the engine speed
(RPM) slowly to make sure adequate lubrication is available
to the bearings.
Engine ShutDown
Idle the engine for three to five minutes before shutting down.
This few minutes of idling allows the lubricating oil and water
to carry heat away from components heat-soaked by hot
combustion/exhaust gasses.
The larger the engine, the greater the need for this idling period
and of course, the length of the idling period should somewhat
follow the size of the engine in order to avoid seals or like
features of an engine being damaged by rising heat.
1. Place the transmission in the (N) Neutral position.
2. Apply the parking brake.
3. Turn OFF the headlights and all accessories.
4. Idle a hot engine for 2 to 5 minutes to allow the
turbocharger to cool.
5. Rotate the key counterclockwise to the OFF position,
and remove key from the ignition switch.
Shut-Down Warning Indicator Or Beeper
WARNING
In the event engine shutdown occurs, make
certain that vehicle is safely off the roadway,
the 4-way emergency flashers are on, and traffic
warning devices are properly placed. Failure to
remove vehicle from roadway could cause an
accident and result in property damage, personal
injury, or death.
Vehicles may be equipped with an automatic shutdown system
that stops the engine in the event of high coolant temperature,
low engine oil pressure, or low coolant level. A warning indicator
on the instrument panel along with a beeper or bell will indicate
high coolant temperature or low oil pressure. If the temperature
and/or pressure continue to change beyond the warning point to
a predetermined level, the engine will automatically shut down.
Vehicles are equipped with an override feature that will allow the
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