Navistar MaxxForce DT 9, Operation And Maintenance Manual

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SECTION 4 – ENGINE OPERATION
Operation (cont.)
HOT WEATHER OPERATION
1. Before operating the engine above 21 °C (70 °F), check or
service the following:
• Full battery charge
• Condition of other electrical equipment
• Check belts for severe cracks, excessive wear, or
missing material
• Cooling system leaks
• Correct coolant and cooling system level
2. At the end of each daily operation do the following:
• Fill the fuel tank with correct fuel.
• Drain water from the fuel filter housing.
• Check oil level.
• Clean external surfaces of the engine and accessories
to prevent dirt build up.
• Clean outside and in between radiator to prevent dirt
build up.
ENGINE SHUTDOWN
Before shutting down an engine that has reached operating
temperature, idle the engine for 2 to 3 minutes, allowing the
hottest engine components to dissipate some of their internal
heat.
Idling is recommended, if an engine has been running at
maximum horsepower.
ENGINE WARNING PROTECTION SYSTEM (EWPS)
The Engine Warning Protection System (EWPS) warns the
operator of engine conditions that can damage the engine.
Optional engine shutdown is available and is activated if one or
more critical conditions are detected.
The Standard Warning System is the base system in which
all engines are equipped. If one of these faults are detected,
the ECM will illuminate the STOP ENGINE lamp and set a
corresponding Diagnostic Trouble Code (DTC).
Standard Warning
• The engine will not shut down.
• RPM - Engine over-speed warning
• Engine Coolant Temperature (ECT) - Engine overheat
warning
Form No. 1172040R1
Page 56
Printed in the United States of America