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Maintenance Operation Frequency - Observation
Inspect the automatic slack
adjuster function
Insufficient power shown in loaded
practice stop
Check the operation of the
brakes, the clutch, and the
steering (*b,a)
Vehicle handling qualities not up to
par
Inspect the vehicle for missing,
damaged, or mislocated noise
shields
Excessive noise emanates from under
the cab or engine compartment
Check the engine performance
and the engine governor
Excessive engine noise
Inspect the fan, the fan shroud,
and the fan clutch
Engine overheats, fans runs at high
speed constantly, excessive fan noise,
or fan wobble due to worn bearings
Check for operation of ABS
warning lamp
At each engine start up
Inspect the entire exhaust
system (including inlet pipe,
muffler, outlet pipe and all
exhaust clamps and fasteners)
for holes, leakage, breakage,
looseness and corrosive
damage
Excessive noise or the smell of fumes
is experienced
Inspect the engine air
induction system (including the
air ducts, the air cleaner, and
the air cleaner element) for
loose fitting, damaged or
missing components
Excessive noise emanates from the
engine compartment
Inspect the tires and check the
air pressure (*c)
Poor steering, wandering or excessive
tire wear
Balance the wheels and the
tires
Vibration or abnormal tire wear
indicates imbalance
Check the front end alignment
(*c)
Poor steering, wandering or excessive
tire wear
General Maintenance Information
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