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SEBU7833-03
Commercial Heavy-Duty Coolant/
Antifreeze and SCA
Commercial Heavy-Duty Coolant which contains
Amine as part of the corrision protection system must
not be used.
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 regula-
tors.
Check the coolant/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.
Refer to Table 22 for part numbers and for quantities
of SCA.
Table 22
Perkins Liquid SCA
Part Number
21825735
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Commercial heavy-duty coolant/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 23 to determine the
amount of Perkins 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 × 0.045 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
This document is printed from SPI². Not for Resale.
NOTICE
NOTICE
Quantity
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
Multiplication
of the Cooling
Factor
System (V)
15 L (4 US gal)
× 0.045
Adding The SCA to The Heavy-Duty
Coolant For Maintenance
Heavy-duty coolant/antifreeze of all types REQUIRE
periodic additions of an SCA.
Test the coolant/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 25 to determine the
amount of Perkins SCA that is required, if necessary:
Table 25
Equation For Adding The SCA To The Heavy-Duty
Coolant For Maintenance
V × 0.014 = 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
Multiplication
of the Cooling
Factor
System (V)
× 0.014
15 L (4 US gal)
49
Maintenance Section
Refill Capacities
Amount of SCA
that is Required
(X)
0.7 L (24 oz)
Amount of SCA
that is Required
(X)
0.2 L (7 oz)
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