PART 8: MAINTENANCE AND SERVICE PREVENTIVE MAINTENANCE SCHEDULE
(R10/06) Y53-6007 – 141 –
CAUTION: Never idle your vehicle for pro-
longed periods of time if you sense that
exhaust fumes are entering the cab or sleeper.
Investigate the cause of the fumes and correct
it as soon as possible. If the vehicle must be
driven under these conditions, drive only with
the windows slightly open. Failure to repair
the source of the exhaust fumes may lead to
personal harm.
NOTES:Keep the engine exhaust system and the
vehicle’s cab/sleeper ventilation system properly
maintained. It is recommended that the vehicle’s
exhaust system and cab/sleeper be inspected
• By a competent technician every 15,000 miles/
24,000 km.
• Whenever a change is noticed in the sound of
the exhaust system.
• Whenever the exhaust system, underbody, cab
or sleeper is damaged.
NOTE: Use only exact replacement components
in exhaust systems. Certain components contain
integral catalytic converters essential for compli
-
ance with EPA emission standards. Using non-
compliant components as a replacement could
violate these standards and also void the emis
-
sion system’s warranty.
WARNING! Hot engine oil can be dangerous.
You could be seriously burned. Let the engine
oil cool down before changing it.
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