Perkins 402F-05 Operation And Maintenance Manual page 61

SEBU9064-08
• Drain the cooling system into a suitable container.
Dispose of the coolant according to local
regulations. Flush the system with a 5 to 10
percent solution of Perkins ELC. 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
regulators.
Check the antifreeze (glycol concentration) 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 23 to determine the
amount of SCA that is required when the cooling
system is initially filled.
Table 23
Equation For Adding The SCA To The Heavy-Duty Coolant At
The Initial Fill
V × 0.07 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
water temperature
Table 24 is an example for using the equation that is
in Table 23 .
Table 24
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) × 0.07
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.
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 25 to determine the
amount of SCA that is required, if necessary:
Table 25
Equation For Adding The SCA To The Heavy-Duty Coolant
For Maintenance
V × 0.023 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 26 is an example for using the equation that is
in Table 25 .
Table 26
Example Of The Equation For Adding The SCA To The Heavy-
Duty Coolant For Maintenance
Total Volume of the Multiplication
Factor
Cooling System (V)
15 L (4 US gal) × 0.023
Cleaning the System of Heavy-Duty
Antifreeze
• Clean the cooling system after used coolant is
drained or before the cooling system is filled with
new coolant.
61
Maintenance Section
Fluid Recommendations
Amount of SCA
that is Required
(X)
1.05 L (35.5 oz)
Amount of SCA
that is Required
(X)
0.35 L (11.7 oz)