Navistar WorkStar Series, Operator'S Manual

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Operation
distribution center is located behind a hand-removable cover on
the instrument panel on the passenger side of the vehicle.
Engine
The engine for this vehicle is an electronically controlled diesel
engine. A separate electronic control module (ECM) monitors
and controls all engine functions. This ECM also communicates
with the body electrical system, which will generate or activate
the necessary indicators to alert the driver of out-of-range
operating conditions.
For complete information on the engine in this vehicle and
its optional features, refer to the Engine Operation and
Maintenance Manual supplied with this vehicle.
NOTE: For information pertaining to fuel and requirements refer
to the Engine Operation and Maintenance Manual provided with
the vehicle.
Charge Air Cooler
All MaxxForce® engines are equipped with a charge air cooling
system. The function of the charge air cooler is to cool the hot
compressed air before it enters the engine’s intake manifold.
This system uses ambient air as the cooling medium by allowing
the intake air to pass through a network of heat exchanging
fins and tubes prior to entering the combustion chamber. The
resulting cooler intake air is denser than uncooled air and will
allow additional fuel to be injected for greater power while helping
to reduce emissions.
Engine Brake, Retarder (Optional)
WARNING
Do not use the vehicle retarder, engine brake
on slippery road surfaces. Doing so may cause
wheel slippage and/or loss of vehicle control,
which could result in property damage, personal
injury, or death.
WARNING
Before operating the Engine brake feature, study
the following descriptions and instructions as
well as the engine Operator’s manual. Failure to
do so could result in property damage, personal
injury, or death.
NOTE: The engine brake should never be considered a
substitute for the vehicle service brakes. The service brakes
should always be viewed as the primary vehicle slowing system.
Service brakes are always used to bring vehicle to a complete
stop.
Engine braking features are used for traffic conditions that
require frequent use of the service brake and therefore
shortening brake lining life. The features also allow the driver
to slow the vehicle down or maintain a constant speed on steep
road grades that would otherwise result in prolonged use of the
service brake that could cause brake fade.
The optional braking features are controlled by the driver using
the ENGINE BRAKE ON/OFF switch, and ENGINE BRAKE
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