Paccar PX-9, Руководство оператора

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Cooling System
WARNING
Do not remove the surge tank fill cap
on a hot engine. It can cause scalding
coolant to spray out and you could be
burned. If the engine has been operat-
ed within the last 30 minutes, be very
careful in removing the radiator cap.
Protect face, hands, and arms against
escaping fluid and steam by covering
the cap with a large, thick rag. Failure
to comply may result in death, person-
al injury, equipment or property dam-
age
WARNING
Handle coolant and antifreeze careful-
ly. Ethylene glycol antifreeze is poison-
ous. Store in original fluid container
only, and always keep out of the reach
of children. Never remove the filler cap
(vertically mounted) on the surge tank
while the engine is still hot. Wait until
the coolant temperature is below
120°F (50°C). Scalding steam and flu-
id under pressure may escape and
cause serious personal injuries. The
pressure cap (horizontally mounted)
on the surge tank should never be
opened. Failure to comply may result
in death, personal injury, equipment or
property damage.
Coolant/Antifreeze Condition
Perform these maintenance procedures
when indicated by the Preventative
Maintenance Schedule.
NOTE
Test the engine coolant at least twice
per year to determine if the coolant
must be replaced. If it is determined
that the coolant should be replaced,
make sure to flush the coolant system.
Contact a PACCAR® Authorized Re-
pair Location for flushing the coolant
system.
Service interval is every oil change or
15,000 mi (24,000 km), 500 hours, or 6
months, whichever occurs first. A heavy-
duty, year-round antifreeze that meets the
chemical composition of GM6038M must
be used. The change interval is 2 years or
240,000 mi (385,000 km), whichever
occurs first. Antifreeze is essential for
freeze and corrosion protection.
Supplemental coolant additives are
essential for liner pitting and scaling
protection.
1. Check the following anti-freeze
conditions:
• Coolant level
• Freeze point
• pH level
• Nitrite level
• Carboxylate level
Checking Coolant Condition
To ensure the Extended Life Coolant (ELC)
in your vehicle always provides maximum
protection, perform the following tests:
1. Check the coolant color at every
maintenance interval. It
should have no cloudiness, floating
debris, or oils.
2. Test the freeze point at least twice
a year. A refractometer or test
strips can be used to measure the
protection level.
3. Determine the pH and chemical
inhibitor concentration level by
ENGINE MAINTENANCE - Maintenance Procedures
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