operators_manual

circuit has a leak and loses air. In such a
scenario, the parking brakes will apply
.
The vehicle’s parking brake controls are
the yellow diamond shaped knob on your
dash board. If the vehicle is equipped to
tow a trailer, then there will be an additional
red octagon shaped knob for the trailer
parking brakes. Parking brakes will be
engaged when either of these knobs are
pulled OUT. (If one knob is pulled out, the
other knob will automatically pop out.)
Pushing IN a knob will disengage the
respective parking brakes. If you push in
the yellow knob only, you will disengage
the vehicle’s parking brakes but will not
disengage the trailer parking brakes (if
applicable). Either knob will pop back out if
the system pressure is not above 60 psi
(414 kPa). The instrument panel display
will provide a message any time the
parking brakes (vehicle or the trailer) are
set and the vehicle is put into motion.
Automatic Traction Control
This feature is controlled by a switch on the
dash. Do not allow the traction control lamp
to remain on continuously for an extended
length of time. Extended continuous use of
the A
TC can cause overheating of the drive
wheel brakes. Engine torque or vehicle
speed should be reduced to eliminate
wheel spin and prevent excessive
application of the ATC system. Except for
checking for proper illumination of the ABS
and traction control warning lamps when
first starting the vehicle, and for monitoring
these lamps while driving, no special
operating procedures are required. For
detailed system description, see literature
for your specific ABS that was provided
with your vehicle.
Antilock Brake Systems (ABS)
This vehicle may be equipped with an
ABS, which reduces the possibility of
wheel lock-up. If a wheel is about to lock
during braking, the ABS will automatically
adjust air pressure to the brake chambers
on the appropriate wheel(s) to prevent
wheel lock-up. The ABS is automatically
turned on when the ignition switch is turned
on.
WARNING
The antilock brake system is a critical
vehicle
safety system. For the safety
of you and others around you, have
the vehicle submitted for periodic pre-
ventive maintenance checks as well as
having any suspected problems imme-
diately checked by an authorized deal-
er. Failure to properly maintain your
brake system can lead to serious acci-
dents. Failure to comply may result in-
property damage, personal injury, or
death.
DRIVING - Brakes
Y
our truck/tractor ABS is equipped with an
automatic traction control (ATC) feature.
Y53-6096-1C1 (09/20)
115
4