Peterbilt 325 2017, Operator'S Manual, Page: 103 / 392

STANDARD GAUGES
Diesel Exhaust Fluid (DEF)
Gauge
The diesel exhaust fluid gauge shows
the approximate amount of DEF fluid
in the DEF tank. 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. Maintain an adequate
amount of diesel exhaust fluid at all
times, as provided in the aftertreatment
system operator manual. Please refer
to the aftertreatment operator manual
for more details about DEF fluid.
CAUTION
Use Diesel Exhaust Fluid only. Fail-
ure to do so may damage compo-
nents of the Diesel Particulate Filter
(DPF).
Primary (Secondary) Air
Pressure Gauge (Air
Reservoir)
The air pressure gauge indicates the
amount of air pressure 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 reservoir.
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