C - Peterbilt Motors Company

• Engine Coolant Level –
Check/Correct
With the engine off and
temperature cool:
° Check coolant level. It should
be visible through the clear
plastic surge tank.
° Add coolant as necessary by
removing the pressure cap on
the neck of the surge tank or
sight glass.
° Replacement or top up
coolant should have the same
antifreeze concentration and
corrosion inhibitor content
as the original coolant in the
cooling system.
° Always dilute antifreeze to
the correct concentration
based on freeze protection
before adding it to the cooling
system. Adding or using 100%
antifreeze in a cooling system
may result in cooling system
plugging and overheating
problems.
• Diesel Emission Fluid (DEF) level
– Check/Top Up:
NOTE: It is recommended
to top up DEF when
refueling. See Engine
Aftertreatment Systems
Operator’s Manual for DEF
information.
• Check for any signs of fluid
leaks
• Ensure all access caps/covers are
installed and tight.
Maintenance Guidelines
Every 20,000 mi (32,000 km), 600
Hours, or 6 Months - Maintenance
Check
• Air Cleaner Restriction -
Check/Correct
° Service filter element when
air cleaner restriction gauge
(option) locks in the extreme
high position.
° Hose/pipe condition -
deterioration/signs of leaking
° Hose clamp torque
• Charging/Cranking System-
Check
° Inspect electrical
harness/cables for loose
connections, corrosion,
chafing, and broken retention
clips.
• Charge Air Piping - Check/Correct
° Hose/pipe condition -
deterioration/signs of leaking
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