Specifications

CONTROLS AND DISPLAY STANDARD GAUGES
Medium Duty
(R05/09) Y53-6008A – 41 –
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 man-
ual for more details about DEF fluid.
CAUTION: Use Diesel Exhaust Fluid only. Failure
to do so may damage components of the Diesel
Particulate Filter (DPF).
Primary (Secondary) Air Pressure Gauge
(Air Reservoir)
The air pressure gauge indicates the amount of air pres-
sure in the brake system in pounds per square inch (psi).
• The primary gauge shows front reservoir air pressure.
• The secondary gauge shows pressure in the rear res-
ervoir.
Ensure the air pressure registers more than 100 psi in
both service systems before you move the vehicle. If the
pressure in either circuit is too low for normal brake oper-
ation, the warning light will glow and the audible alarm will
sound.