operators_manual

repair, or replacement, of any
device or element of design
incorporated into any new vehicle
for the purpose of noise control
prior to its sale or delivery to the
ultimate purchaser or while it is in
use, or
2. The use of the vehicle after such
device or element of design has
been removed or rendered
inoperative by any person. Among
those acts presumed to constitute
tampering are the acts listed below:
• Air Intake System
• Removing or rendering
inoperative the air cleaner/
silencers or intake piping.
• Engine Cooling System
• Removing or rendering the fan
clutch inoperative.
• Removing the fan shroud.
• Engine
• Removing or rendering engine
speed governor inoperative so
as to allow engine speed to
exceed manufacturer's
specifications.
• Modifying ECU parameters.
• Exhaust System
• Removing or rendering
inoperative exhaust system
components.
• Fuel System
• Removing or rendering engine
speed governor inoperative,
allowing engine speed to
exceed manufacturer's
specifications.
• Removing of air signal
attenuator on engines
equipped with this device.
• Removing of diesel exhaust
fluid tank and system.
• Inner Fender Shields and Cab
Skirts
• Removing shield or skirts.
• Cutting away parts of shields,
skirts or damaged or loose
portions of shields or skirts.
• Noise Insulating Blankets
• Removing noise insulators
from engine block or from
around the oil pan.
• Cutting holes in, or cutting
away part of noise insulators.
• Removing hood-mounted
noise insulation.
Inspecting Noise and Emission
Components
If, during periodic inspection and
maintenance of other systems and
components, it is found that parts of the
noise control system require attention, we
recommend that those parts be inspected
at more frequent intervals to assure
adequate maintenance and performance.
The following instructions are based on
inspection of the noise control system at
regular intervals as indicated in the Noise
Control System - Maintenance Log on
page 274.
Air Intake System
• Do all checks and maintenance
procedures listed in this manual
under Engine Air Intake System
and Air Cleaner.
• Check the induction tubing, elbow
connections, clamps, brackets, and
fasteners for deterioration, cracks,
and security.
• If you find an air leak anywhere
between the air cleaner and the
engine, repair that leak
immediately.
MAINTENANCE - Noise and Emission Control
254 Y53-6047-2HEN (03/18)
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