operators_manual

Diesel Exhaust Fluid (DEF)
The diesel exhaust fluid gauge shows the
approximate amount of DEF fluid in the
DEF tank.
CAUTION
Use Diesel Exhaust Fluid only. Failure to do
so may damage components of the Diesel
Particulate Filter (DPF).
Besides empty and full, the gauge also
indicates 1/4, 1/2, and 3/4 of total capacity.
DEF fluid is required to meet certain
emission requirements. Do not allow your
DEF tank to remain empty. Please refer to
your emission supplemental manual for
more details about DEF fluid.
Vehicle Air Pressure
The Primary Air Pressure gauge indicates
pressure in the rear braking system. The
Secondary gauge indicates pressure in the
front braking system.
Each gauge indicates the amount of air
pressure in each system in pounds per
square inch (psi). On vehicles equipped
with metric air pressure gauges, the gauge
face plate includes a kPa (major) scale and
psi (minor) scale.
NOTE
Be sure the air pressure registers more than
100 psi (690 kPa) in both service systems
before you move the vehicle.
NOTE
If the pressure in either or both circuits falls
below 65 psi (448 kPa), a red warning light
in the gauge will turn on and an audible
alarm tone will sound when the engine is
running.
WARNING!
If the air pressure falls below 60 psi (414
kPa) the spring brakes may stop the vehicle
abruptly, which could cause an accident re-
sulting in personal injury or death. Observe
the red warning lamps on the gauges. If one
comes on, do not continue to drive the vehi-
cle until it has been properly repaired or
serviced.
WARNING!
The air pressure warning light and the audi-
ble alarm tone indicate a dangerous situa-
tion: there is not enough air pressure in the
air tanks for repeated braking and the brake
system has failed. Without the use of your
service brakes your spring brakes could
suddenly apply causing a wheel lockup, loss
of control, or overtake by following vehicles.
This may cause an accident resulting in
death or personal injury. Bring the vehicle to
a safe stop right away, while you still have
control of the vehicle.
See Also
Low Air Alarm on page 30
Driver Information Display
The display can show multiple warning
lights. Warning information will appear
momentarily and then will minimize in the
screen. Reviewing the warnings can be
CONTROLS - Diesel Exhaust Fluid (DEF)
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