PREVENTIVE MAINTENANCE ENGINE COOLING SYSTEM
Regional Haul
(R05/10) Y53-6033 – 175 –
Fan Drive and Blade
Fan Blade Clearance: Around the fan shroud, the recom-
mended distance is 1 in. (25 mm) from front edge of any
fan blade-to-radiator side member. Minimum clearance is
3/4 in. (19 mm).
• Rear edge of any blade must be no closer than 3/8 in.
(9 mm) to the nearest engine component. If this can-
not be obtained, the fan spacer or fan is not correct.
• The leading edge of any fan blade must be 1 in. (25
mm) from the inside edge of the shroud.
Exhaust System
The exhaust system is part of the noise control system.
Periodically check the exhaust for wear and loose or miss-
ing parts. For details, see “Noise and Emission Control”
on page 252.
WARNING! The exhaust piping and Diesel
Particulate Filter can become extremely hot
during engine operation and can cause death
or personal injury including serious burns to
the skin. Allow adequate cooling time before
working on or near any part of the exhaust
system.
Engine Cooling System
Your engine’s cooling system is standard with Extended
Life Coolant (ELC). ELC consists of a mixture of ethylene
glycol, water, and organic acid technology chemical inhib-
itors. ELC prevents corrosion and scale formation as well
as provides freezing and boiling point protection.
CAUTION: The engine cooling system has
very specific maintenance and inspection
requirements. Failure to follow requirements
can damage the engine. Engine damage can
include but is not limited to:
• Freezing
• Boiling
•Corrosion
• Pitted cylinder liners
This information is found in the engine manu-
facturers owner’s manual. It is the owner’s
responsibility to follow all requirements listed
in the engine manufacturers owner’s manual.
