Air Brake System - freightliner NEW CASCADIA 2016 Driver Manual

Brake Systems

Air Brake System

Brake System General Information
A dual air brake system consists of two independent
air systems that use a single set of brake controls.
Each system has its own reservoirs, plumbing, and
brake chambers. The primary system operates the
service brakes on the rear axle; the secondary sys-
tem operates the service brakes on the front axle.
Service brake signals from both systems are sent to
the trailer.
WARNING
Do not operate the vehicle with the front brakes
backed off or disconnected. Backing off or dis-
connecting the front brakes will not improve ve-
Telltale Color
Red
P
Red
PARK
Amber
Amber
Amber
13.1
Brake System Warnings, Indicators, and Messages
Low Air Pressure Indicates air pressure in the primary or
(EPA10 and secondary reservoir has dropped below
Newer) approximately 70 psi (483 kPa).
Parking Brake
(EPA10 and Indicates the parking brake is engaged.
Newer)
Momentary illumination indicates the vehicle
ABS is engaged.
Vehicle ABS
Solid illumination indicates a problem with the
vehicle ABS. Repair the ABS immediately to
ensure full braking capability.
Momentary illumination indicates the trailer
ABS is engaged.
Trailer ABS
Solid illumination indicates a problem with the
trailer ABS. Repair the ABS immediately to
ensure full braking capability.
Flashing indicates wheel spin or a stability
Wheel Spin and/or
event has been detected, and the system is
Stability
active.
hicle handling and may lead to loss of vehicle
control, resulting in property damage or personal
injury.
If air pressure drops below approximately 70 psi (483
kPa) in either system, a warning light illuminates and
the driver display shows a warning. An audible alert
also sounds if the park brake is not set. See
Table 13.1.
If the low air pressure warning is activated, check the
air pressure gauges to determine which system has
low air pressure. Although the vehicle's speed can be
reduced using the foot brake control pedal, either the
front or rear service brakes will not be operating at
full capacity, causing a longer stopping distance.
Bring the vehicle to a safe stop and have the air sys-
tem repaired before continuing.
Description Driver Display
06/30/2016 f611429
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