freightliner 108SD, Driver Manual

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3.2 Momentarily raise the paddle of the Set/
Resume switch to RES/ACC. Cruise will
return to the last speed selected.
NOTE: When the vehicle speed drops below
the minimum cruise control speed, cruise
control will disengage. To resume to the pre-
selected cruise speed, increase vehicle
speed to above minimum cruise control
speed and momentarily raise the paddled of
the Set/Resume switch to RES/ACC.
NOTE: The speed memory is lost whenever the
ignition is turned off or the cruise control switch
is toggled to Off.
4. To increase cruise speed, raise and hold the
paddle of the Set/Resume switch to RES/ACC
until the vehicle accelerates to the desired
speed.
5. To decrease cruise speed, lower and the paddle
of the Set/Resume switch to SET/CST until the
vehicle decelerates to the desired speed.
Auxiliary Braking Applications
Engine Brake
Each engine manufacturer uses a specific engine
brake for their engine. Regardless of the manufac-
turer, the engine brake is operated with the principles
outlined in this chapter. Refer to the engine manufac-
turer’s operation manual for details of their particular
engine brake product.
WARNING
To avoid injury from loss of vehicle control, do
not activate the engine brake system under the
following conditions:
•
on wet or slippery pavement, unless the
vehicle is equipped with antilock braking
system (ABS) and you have had prior expe-
rience driving under these conditions;
•
when driving without a trailer or pulling an
empty trailer;
•
if the tractor drive wheels begin to lock, or
there is fishtail motion after the engine
brake is activated.
Whenever vehicle braking is required on good road
conditions, the engine brake may be used in con-
junction with the service brakes. There is no time
limit for operation of the engine brake. However, an
engine brake does not provide the precise control of,
and is not a substitute for, service brakes.
WARNING
Usage of the engine brake as the primary braking
system can cause unpredictable stopping dis-
tances, that could result in personal injury or
property damage. Service brakes are the primary
vehicle braking system.
Two dash-mounted switches control the engine
brake:
09/13/2001
1
2
f610510
To turn cruise control on, press the upper half of the On/
Off switch. To turn cruise control off, press the lower half
of the On/Off switch.
To increase cruise speed, raise and hold the paddle of
the Set/Resume switch to RES/ACC until the vehicle
accelerates to the desired speed. To decrease cruise
speed, lower and the paddle of the Set/Resume switch to
SET/CST until the vehicle decelerates to the desired
speed.
1.
Cruise Control On/Off Switch
2. Cruise Control Set/Resume Switch
Fig. 10.3, Cruise Control Switches
Optional Engine Systems
10.3