freightliner 108SD, Driver Manual

Page: 42 / 192

Engine Brake Switch
NOTE: See Chapter 10 for detailed information
about engine brake operation.
Two dash-mounted switches control the engine
brake:
•
The On/Off switch (ENG BRK), is used to turn
the engine brake on and off. See
Fig. 5.22 .
•
The engine brake intensity switch (HI/MED/LO
or, in some cases, HI/LO) controls the amount
of engine braking.
Engine Fan Switch
The engine cooling fan can be manually activated
with the engine fan switch. The fan will continue to
operate for a set amount of time and then turn off
unless the coolant temperature is high enough to
continue the fan operation.
To turn the engine fan on, press the upper part of the
rocker switch. See
Fig. 5.23 . Press the bottom of the
switch to deactivate it.
Exhaust Brake Switch
NOTE: See Chapter 10 for detailed information
about exhaust brake operation.
An exhaust brake may be used in conjunction with
the service brakes during off-highway and mountain
driving as well as in traffic or high-speed highway
driving. Exhaust brakes are not intended for use as
the primary braking system during vehicle operation.
The exhaust brake is controlled by a dash-mounted
rocker switch. See
Fig. 5.24 or Fig. 5.25 .
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. 5.21, Cruise Control Switches
10/17/2001 f610588
1 2
1. Engine Brake On/Off
2. Engine Brake Intensity Switch
Fig. 5.22, Engine Brake Switches
f610590 01/04/2011
Fig. 5.23, Engine Fan Switch
Driver Controls
5.9