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The purpose of the exhaust brake (engine braking) fea-
ture is to supply negative (braking) torque to the engine.
Typically, the engine braking is used for, but not limited
to, vehicle towing applications where vehicle braking can
be achieved by the internal engine power, thereby spar-
ing the mechanical brakes of the vehicle.
Benefits of the exhaust brake are:
•
vehicle driving control
•
reduced brake fade
•
longer brake life
•
faster cab warm-up.
The exhaust brake feature can also be used to reduce the
engine warm up time. To use the exhaust brake as a
warm-up device, the vehicle must be stopped or moving
less than 5 mph (8 km/h), the exhaust brake switch must
be in the ON position, and the coolant temperature must
below 180°F (82°C) and ambient temperature below 60°F
(16°C).
AUTOMATIC TRANSMISSION — IF EQUIPPED
CAUTION!
Damage to the transmission may occur if the follow-
ing precautions are not observed:
•
Shift into PARK only after the vehicle has come to
a complete stop.
•
Shift into or out of REVERSE only after the
vehicle has come to a complete stop and the engine
is at idle speed.
•
Do not shift from REVERSE, PARK, or NEUTRAL
into any forward gear when the engine is above
idle speed.
(Continued)
220 STARTING AND OPERATING