operators_manual

Parking Brake
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1. Normal run position
2.
Trailer park with vehicle released
3. System park or trailer charge with
vehicle parked
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.
Engage Trailer Hand Brakes
Press the lever down to engage the Trailer
Hand Brakes. Push the lever back up to
release the T
railer Hand Brakes.
Automatic Traction Control
Your truck/tractor ABS is equipped with an
automatic traction control (A
TC) feature.
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 ATC can cause overheating of the drive
wheel brakes. Engine torque or vehicle
DRIVING - Brakes
Parking brakes work in reverse action of
the regular brakes. When the parking
brakes are engaged, air is exhausted from
the spring chambers, which allows the
spring to engage the brakes. This design
also provides a safety function if a brake
Y53-6110-1A1 (01/21) 161
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