brake chamber. Once inside of the chamber, dirt
and debris can cause the internal parts of the
chamber to deteriorate faster.
2.
Inspect the exterior surfaces of brake chambers
for damage. Make sure that breather holes are
open and free of debris.
NOTE: Do not route air brake lines on top of
anything likely to be stepped on.
3.
Inspect air brake lines for dents, swelling, kinks,
twisting, abrasion, and damage, especially near
moving parts.
4.
Inspect flex air lines for deterioration or signs of
abrasion.
5.
Inspect for cracked, worn, or oil-contaminated
brake linings and brake drums (or rotors).
6.
Check the thickness of the brake linings.
Replace brake linings on all brake assemblies on
the axle if any brake linings are worn to less than
approximately 1/4 inch (6.4 mm) at the thinnest
point.
Saddle Tank Areas Inspection
WARNING
When draining the air reservoir, do not look into
the air jets or direct them toward anyone. Dirt or
sludge particles may be in the airstream and
could cause injury.
NOTICE
If the water drained from the air reservoirs is
cloudy or oily, it may indicate a problem with the
compressor. If oil is allowed to contaminate the
air dryer, it will not remove the water from the air
brake system, which could adversely affect
braking.
1.
Drain the brake system air reservoirs (reservoirs
with automatic drain valves only).
NOTE: Battery locations vary between vehicles.
2.
Inspect the batteries.
WARNING
Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to the State of California to cause cancer
and reproductive harm. To prevent possible
personal injury, always wash your hands after
handling battery parts and related accessories.
2.1
Remove the battery box cover and inspect
all visible battery cables for loose wiring or
damage.
2.2
Check that the battery hold-down is
secure.
IMPORTANT: Aerodynamic components
decrease drag force as a vehicle moves,
thereby improving fuel efficiency. If replacement
of an aerodynamic component is necessary,
replacement components must meet or exceed
the drag reduction performance of the originally
installed component in order to maintain
compliance with greenhouse gas and fuel
efficiency regulations.
3.
Inspect the following aerodynamic components, if
equipped, for structural damage, cracks, or wear.
•
Chassis fairings
•
Roof fairing/deflector
•
Side skirts
•
Cab/sleeper extenders
•
Battery access cover
Engine Compartment Inspection and
Adjustments
IMPORTANT: If replacement of the hood or
bumper is necessary, the replacement
component must meet or exceed the drag
reduction performance of the originally installed
item in order to maintain compliance with
greenhouse gas and fuel efficiency regulations.
NOTE: Anytime a hood is adjusted, removed, or
reinstalled, the headlamp aim should be
checked.
1.
Inspect the bumper and hood for structural
damage, cracks, or wear.
2.
Check the hydraulic clutch reservoir, if equipped.
If necessary, add DOT 4 brake fluid.
3.
Inspect the radiator and heater hoses, including
the clamps and support brackets.
Pre- and Post-Trip Inspections and Maintenance
22.12
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