Peterbilt 579 - Page 84

INSTRUMENT PANEL
3
Check the engine manufacturer's
manual for the correct oil pressure
ranges for your vehicle's engine.
If the
oil pressure suddenly drops,
or the audible alarm and engine oil
pressure warning light come on while
driving, please
refer to Engine Oil
Pressure Lamp
Turns On on page 2-4
regarding what
to do if oil pressure is
insufcient.
For further
information on engine
gauges and operating your engine
properly,
refer to Engine Maintenance
on page
5-92.
6. Diesel Exhaust
Fluid (DEF)
The diesel exhaust uid gauge shows
the approximate amount of DEF uid
in the DEF tank. Besides empty and
full, the gauge also indicates 1/4, 1/2,
and 3/4 of total capacity. DEF uid
is required to meet certain emission
requirements. Do not allow your DEF
tank to remain empty. Please refer
to the Engine Aftertreatment Controls
Operator's Manual for more details
about DEF uid.
CAUTION
Use Diesel Exhaust Fluid only. Failure
to do so may damage components of
the Diesel Particulate Filter (DPF).
7 and
8. Primary and Secondary Air
Pressure
Primary Air Pressure
Secondary 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.
3-12
Y53-6047–2C (04/13)