Note: The cooling system cleaner must be thoroughly
flushed from the cooling system. Cooling system
cleaner that is left in the system will contaminate the
coolant. The cleaner may also corrode the cooling
system.
8. Repeat Steps 6 and repeat steps 7 until the system
is completely clean.
9. Fill the cooling system with the Perkins Premixed
ELC.
ELC Cooling System Contamination
NOTICE
Mixing ELC with other products reduces the effective-
ness of the ELC and shortens the ELC service life.
Use only Perkins Products for premixed or concen-
trate coolants. Failure to follow these recommenda-
tions can result in shortened cooling system
component life.
ELC cooling systems can withstand contamination to
a maximum of 10 percent of conventional heavy-duty
antifreeze or SCA. If the contamination exceeds 10
percent of the total system capacity, perform ONE of
the following procedures:
• Drain the cooling system into a suitable container.
Dispose of the coolant according to local
regulations. Flush the system with clean water. Fill
the system with the Perkins ELC.
• Drain a portion of the cooling system into a
suitable container according to local regulations.
Then, fill the cooling system with premixed ELC.
This procedure should lower the contamination to
less than 10 percent.
• Maintain the system as a conventional Heavy-Duty
Coolant. Treat the system with an SCA. Change
the coolant at the interval that is recommended for
the conventional Heavy-Duty Coolant.
Commercial Heavy-Duty Antifreeze and
SCA
NOTICE
Commercial Heavy-Duty Coolant which contains
Amine as part of the corrosion protection system
must not be used.
NOTICE
Never operate an engine without water temperature
regulators in the cooling system. Water temperature
regulators help to maintain the engine coolant at the
correct operating temperature. Cooling system prob-
lems can develop without water temperature
regulators.
Check the antifreeze (glycol concentration) in order to
ensure adequate protection against boiling or
freezing. Perkins recommends the use of a
refractometer for checking the glycol concentration. A
hydrometer should not be used.
Perkins engine cooling systems should be tested at
500 hour intervals for the concentration of SCA.
Additions of SCA are based on the results of the test.
An SCA that is liquid may be needed at 500 hour
intervals.
Adding the SCA to Heavy-Duty Coolant at
the Initial Fill
Use the equation that is in Table 14 to determine the
amount of SCA that is required when the cooling
system is initially filled.
Table 14
Equation For Adding The SCA To The Heavy-Duty Coolant At
The Initial Fill
V × 0.045 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 15 is an example for using the equation that is
in Table 14 .
Table 15
Example Of The Equation For Adding The SCA To The Heavy-
Duty Coolant At The Initial Fill
Total Volume of the
Cooling System (V)
Multiplication
Factor
Amount of SCA
that is Required (X)
15 L (4 US gal) × 0.045 0.7 L (24 oz)
Adding The SCA to The Heavy-Duty
Coolant For Maintenance
Heavy-duty antifreeze of all types REQUIRE periodic
additions of an SCA.
Test the antifreeze periodically for the concentration
of SCA. For the interval, refer to the Operation and
Maintenance Manual, “Maintenance Interval
Schedule” (Maintenance Section). Cooling System
Supplemental Coolant Additive (SCA) Test/Add.
78 SEBU8726
Refill Capacities
Fluid Recommendations
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