operators_manual

• Lights - turn ignition key to the ON
position and check for warning
lights and buzzer
. Check operation
of turn signals and emergency
lights.
• Instruments - check all instruments.
See Systems Check on page 26
• Windshield - check operation of
windshield wipers and washers.
• Horn - check operation of horn.
• Fuel - check fuel. Is there enough
fuel?
• Diesel Exhaust Fluid - check level.
Is there enough fluid?
• Air conditioning filters in the cab
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 [e-mail].
Engine
•
Belts
• Hoses
• Clamps
• Radiator
• Air filter and its housing
• Engine aftertreatment system
components
• Exhaust pipes
• 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.
• Wheel cap nuts - are they all in
place and torqued properly -
tighten if necessary. Wheels on
page 242
• Controls and wiring - check for
condition and adjustment
• Steering components - check
pitman arm, drag link, intermediate
shaft U-joint pinch bolt, tie rod,
steering shaft and power steering
hoses, etc., for loose, broken, or
missing parts.
• Cab air conditioner fresh air filter -
check for condition and
cleanliness.
•
PACCAR 20k Front Axle Kingpin
Joint Grease/Tie Rod Ends (option)
(VOCATIONAL USE) - For
vocational vehicles with this axle,
grease with Heavy-Duty
Multipurpose Lithium Based: #1 or
#2 grade, every 50 hours. (Refer to
Front Axle and Suspension on
page 224 for maintenance
instructions.)
Systems Check
Systems Check evaluates each monitored
system and shows the progress of that
check on the display. The Systems Check
will appear when the Exterior Lighting Self-
Test (ELST) is activated (see Exterior
Lighting Self-Test (ELST) on page 77), or
when viewing the Notifications sub-menu
(see Menu on page 74).
SAFETY - Weekly Checks
26 Y53-6096-1C1 (09/20)
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