PART 8: MAINTENANCE AND SERVICE NOISE CONTROL SYSTEM
(R05/10) Y53-6032 – 225 –
Piping
Check for rust, corrosion, and damage. If piping is perfo-
rated at any point, temporary patching or lagging is
acceptable until you can have permanent repairs made.
On turbocharged engines check joints at the flanges and
mounting brackets for tightness.
Diesel Particulate Filter (DPF)
NOTE: Use only exact replacement components
in exhaust systems. Certain components contain
integral catalytic converters essential for compli-
ance with EPA emission standards. Using a non-
compliant component as a replacement could
violate these standards and also void the emis-
sion system’s warranty.
Check clamps and mounting brackets for security. Check
internal baffling for security. You can do this by listening for
rattling sounds while tapping the unit with a rubber mallet
or revving the engine up and down through its normal
operating range. Check the DPF for rust and corrosion.
Exhaust Tail Pipe(s)
Check the mounting security. Tighten as necessary. The
miter cut at the tip of the pipe must be facing the rear of
the truck. Do not modify the end of the pipe in any way.
Fan Shroud
WARNING!
Do not work on the fan with the
engine running. The engine fan can engage at
any time without warning. Anyone near the fan
when it turns on could be killed or seriously
injured. Before turning on the ignition, be sure
that no one is near the fan.
Check all fasteners for tightness. Check for stress cracks
in the shroud. Make sure the shroud is adjusted so that it
does not touch the fan blades.
Hood Insulation Blanket
Fasteners
Check all fasteners for condition and security. Repair or
replace any broken or defective fasteners.
Y53-6032.book Page 225 Monday, May 24, 2010 3:37 PM
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