Peterbilt 579 Operator's Manual page 356

NOISE AND EMISSION CONTROL
Diesel Particulate Filters (DPF)
•
Check diesel particulate filter
(DPF), clamps, and mounting
brackets. Tighten if necessary.
Inspect diesel particulate filter
(DPF) for signs of rust or corrosion.
•
Check internal baffling. You can
do this by listening for rattling
sounds while tapping on the diesel
particulate filter (DPF) with a
rubber mallet or revving the engine
up and down through its normal
operating range.
5
5-120
Diesel Exhaust Fluid Tank
Vehicles that comply with 2013 EPA
emission requirements will have a
Diesel Exhaust Fluid (DEF) tank
mounted to the vehicle frame.
Y53-6047–2C
CAUTION
The Diesel Exhaust Fluid (DEF) sys-
tem purges to prevent damage from
freezing. If your vehicle is equipped
with battery disconnect switches, do
NOT disconnect battery power within
two minutes of switching the ignition
key off. Failure to comply may result
in vehicle or property damage.
DEF Filter
The DEF system has a supply
pump filter and this filter should be
serviced according to the preventive
maintenance schedule. Follow these
steps to replace the DEF supply pump
filter:
1. Turn off the vehicle and allow the
vehicle to cool down. Take special
precaution with hot exhaust piping.
(04/13)