PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —162— 22-01691 (R02/02)
Exhaust System
• Removing or rendering inoperative the exhaust system compo-
nents.
Inner Fender Shields and Cab Skirts
• Removing shields or skirts.
• Cutting away parts of shields, skirts or damaged or loose portions
of shields or skirts.
Fuel System
• Removing or rendering engine speed governor inoperative, allow-
ing engine speed to exceed manufacturer’s specifications.
• Removing air signal attenuator on engines equipped with this device.
Inspection/Maintenance Instructions: Noise Control System
The following instructions are based on regular inspection of the
noise control system. If, during regular inspection or maintenance of
other systems or components, you find something wrong with parts of
the noise control system, inspect those parts more frequently to be
sure they are performing up to specification. At the end of this section
you will find the Maintenance Log. This is a schedule of inspection
and maintenance intervals for each component.
Exhaust System
• Manifold
Check for exhaust leaks and condition of gaskets. Replace any
blown gaskets. Use a torque wrench to check all cap-screws,
including those at the flanges. Refer to the engine manufacturer’s
service manual for proper tightening sequence and torque values.
• Joints and Clamps
Check for leaks, and tighten as necessary. Check for deterioration
or dents in pipes and clamps which could allow exhaust to escape.
On tilt-cab units, check the exhaust ball-joint for condition & proper fit.
• Piping
Check for rust, corrosion, and damage. 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 the flanges and mounting brackets for tightness.
• Mufflers
Check clamps and mounting brackets for security. Check internal
baffling for security. You can do this by listening for rattling sounds
while tapping the muffler with a rubber mallet or revving the engine
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