Peterbilt 325 2017, Operator'S Manual, Page: 336 / 392

NOISE AND EMISSION CONTROL
Piping
•
Check exhaust piping for rust,
corrosion, or damage. Replace
deteriorated piping before holes
appear. If piping is perforated at
any point, temporary patching or
lagging is acceptable until you can
have permanent repairs made.
On turbocharged engines, check
joints at flanges and mounting
brackets for tightness.
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.
Diesel Exhaust Fluid Tank
Vehicles that comply with 2010 EPA
emission requirements will have a
Diesel Exhaust Fluid (DEF) tank
mounted to the vehicle frame.
DEF filter
The DEF system has a supply
pump filter and this filter should be
serviced according to the preventive
maintenance schedule. Follow these
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