operators_manual

emissions to exceed Federal standards,
are covered by this warranty for the life of
the vehicle.
T
ampering with Noise Control
System
Federal law prohibits the following acts or
the causing thereof:
1. The removal or rendering
inoperative by any person other
than for purposes of maintenance,
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 filter housing/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 282.
Air Intake System
• Do all checks and maintenance
procedures listed in this manual
under engine air intake system and
air filter housing.
• 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 filter housing and
the engine, repair that leak
immediately.
MAINTENANCE - Noise and Emission Control
Y53-6110-1A1 (01/21) 281
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