• Fifth wheel - Is the kingpin or the
sliding fifth wheel locked?
Cab Interior
• Seat - adjust the seat for easy
reach of controls and visibility
.
• Seat belts - fasten and adjust
safety restraint belts (which may
include restraints in the sleeper).
• Steering column - adjust for easy
reach and visibility.
• Mirrors - check and readjust
mirrors if necessary.
• Lamps - turn ignition key to the ON
position to allow the bulb check
and the systems check to test the
truck systems. Perform an Exterior
Light Selft Test
• Instruments - check all instruments.
see Systems Check on page 30
• Windshield - check operation of
windshield wipers and washers.
• Horn - check operation of horn.
• Fuel - check vehicle's fuel level. Is
there enough fuel?
• Diesel exhaust fluid - check level.
Is there enough fluid?
• Air conditioning filters in the cab
and/or sleeper - check the
condition of the sleeper air
conditioning air filter. Keep the
sleeper floor area behind the
passenger front seat clear of debris
and pet hair. The sleeper air
conditioner draws air from this area
and excessive dirt or pet hair may
shorten the service life of the
sleeper air conditioning air filter.
Weekly Checks
NOTE
These checks are in addition to, not in
place of,
Federal Motor Carrier Safety
Regulations. These regulations may
be purchased by writing to: Superin-
tendent of Documents U.S. Govern-
ment Printing Office Bookstore 710 N.
Capitol St. N.W. Washington, DC
20402, or ContactCenter@gpo.gov.
Engine
• Belts
•
Hoses
• Clamps
• Radiator
• Air filter and its housing
•
Engine Aftertreatment system
components
•
Exhaust pipes
• Engine air pre-cleaner (option) -
For vocational vehicles with
optional engine air pre-cleaner,
check the purge valve at the
bottom of the hood mounted
engine air pre-cleaner for any
obstructions. Make sure the purge
valve will open and close as
needed to purge dirt and water
from the engine intake air.
• Automatic transmission fluid
(where applicable) - Check level,
after the engine has warmed up to
operating temperature.
Chassis and Cab Exterior
• Battery - check battery and
terminals.
• Hood supports and guides are
properly lubricated.
• Wheel cap nuts - are they all in
place and torqued properly -
tighten if necessary. Wheels on
page 271
• Controls and wiring - check for
condition and adjustment
SAFETY - Weekly Checks
Y53-6076-1D1 (09/20) 29
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