Perkins 2506 Operation And Maintenance Manual page 52

52
Maintenance Section
Fluid Recommendations
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 ten percent of conventional heavy-
duty antifreeze or SCA. If the contamination exceeds
ten 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 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 corrision 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
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.
Perkins engine cooling systems should be tested at
500 hour intervals for the concentration of
Supplemental Coolant Additive (SCA).
Additions of SCA are based on the results of the test.
An SCA that is liquid may be needed at 500 hour
intervals.
water temperature
Refer to Table 14 for part numbers and for quantities
of SCA.
Table 14
Perkins Liquid SCA
Part Number
21825755
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Commercial heavy-duty antifreeze that meets "ASTM
D4985" specifications MAY require an addition of
SCA at the initial fill. Read the label or the
instructions that are provided by the OEM of the
product.
Use the equation that is in Table 15 to determine the
amount of Perkins SCA that is required when the
cooling system is initially filled.
Table 15
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 16 is an example for using the equation that is
in Table 15 .
Table 16
Example Of The Equation For Adding The SCA To The Heavy-
Duty Coolant At The Initial Fill
Total Volume of the Multiplication
Factor
Cooling System (V)
15 L (4 US gal) × 0.045
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). Test the
concentration of SCA.
Additions of SCA are based on the results of the test.
The size of the cooling system determines the
amount of SCA that is needed.
Use the equation that is in Table 17 to determine the
amount of Perkins SCA that is required, if necessary:
SEBU8313-02
Quantity
.
Amount of SCA
that is Required (X)
0.7 L (24 oz)