Brake Systems; Dash-Mounted Brake Controls; Parking Brake Control Valve - freightliner cascadia Driver Manual

02/19/2013
0. Resume cruise control set speed.
1, 2, 3. Descent Control maintains set speed.
Fig. 5.26, Descent Control Mode Positions, Detroit
Multifunction Control
(Fig. 5.27, position 1, 2, or 3). This mode engages
one of the engine brake levels, depending on the
lever position. The vehicle will decelerate at a con-
stant rate until the vehicle comes to a stop, unless
throttle applied to override the deceleration, or the
lever is moved to "engine brake off" (position 0).
Moving the lever to position 0 resumes the previously
set cruise control speed.
02/19/2013
0. Resume cruise control
set speed.
1. Low
Fig. 5.27, Deceleration Mode Positions, Detroit
Multifunction Control
0
1
2
3
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0
1
2
3
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2. Medium
3. High

Dash-Mounted Brake Controls

NOTE: See Chapter 13
about brake systems.

Parking Brake Control Valve

NOTICE
Do not step on the service brake pedal while the
parking brakes are applied. To do so can cause
damage to the brake mechanisms.
The yellow diamond-shaped knob operates the park-
ing brake valve. See Fig.
apply both the tractor and the trailer spring parking
brakes. Push the knob in to release the tractor spring
parking brakes. Before the spring parking brakes can
be released, the air pressure in either air brake sys-
tem must be at least 65 psi (447 kPa).
If the trailer is not equipped with spring parking
brakes, pull the parking brake valve out to apply the
tractor parking brakes and the trailer service brakes.
1
03/10/99
1. Trailer Air Supply Valve (red knob)
2. Parking Brake Control Valve (yellow knob)
Fig. 5.28, Brake Valve Control Knobs
Trailer Air Supply Valve
The red octagonal-shaped knob operates the trailer
air supply valve, which charges the trailer air supply
system and releases the trailer spring parking
brakes. See Fig. 5.28.
After the vehicle and its air hoses are connected to a
trailer and the pressure in the air system is at least
65 psi (447 kPa), push the trailer air supply valve
knob in (and leave it in) to charge the trailer air sup-
ply system and release the trailer spring parking
brakes. Pull the trailer air supply valve out before
Driver Controls
for detailed information
5.28. Pull the knob out to
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2
5.14