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Cooling Systems with Larger Capacities
Adding the SCA to Conventional Coolant/Antifreeze at the Initial Fill
Note: When the coolant system is first filled, the SCA is not required to be used with Cat DEAC or with fully formulated coolants that meet the "ASTM D6210" specification.Note: Do not exceed the six percent maximum concentration. Check the concentration of SCA with a SCA test kit, or check the concentration of SCA with Cat S O S coolant analysis.Commercial heavy-duty coolant/antifreeze that meets only the "ASTM D4985" specification WILL require adding supplemental coolant additive at the initial fill. Read the label or the instructions that are provided by the manufacturer of the commercial heavy-duty coolant/antifreeze.Use the equation that is in Table 3 as a guideline in order to aid in determining the amount of SCA that is required when the cooling system is initially filled with fluids that only meet the "ASTM D4985" specification.Note: When adding SCA at initial fill to a coolant/antifreeze that only meets the "ASTM D4985", ensure the SCA is compatible with the antifreeze/coolant. For example, a HOAT coolant that meets the "ASTM D4985" specification may not be compatible with an SCA designed for use with conventional coolants. It is the responsibility of the coolant manufacturer to provide sources of compatible SCAs. It is the responsibility of the coolant manufacturer and SCA manufacturer to demonstrate a positive influence on reducing cavitation corrosion in an operating diesel engineNote: When adding SCA at initial fill to a coolant/antifreeze that only meets the "ASTM D4985", it is a collective responsibility of the user, coolant manufacturer, and SCA manufacturer to ensure the SCA is compatible with the antifreeze/coolant based on the recommendations provided by the coolant manufacturer and SCA manufacturer. One of the test methods required to be used to help ensure SCA compatibility with the antifreeze/coolant concentrate is "ASTM D5828-97". 6% SCA in the solution that is 60 parts antifreeze/coolant of interest, 34 parts water, and 6 parts SCA must have no more than 0.1 mL of formed insolubles. 12% SCA in a solution that is 60 parts antifreeze/coolant of interest, 28 parts water, and 12 parts SCA must have no more than 2 mL of formed insolubles. The SCA manufacturer is responsible for ensuring their SCA is compatible with water meeting the “Caterpillar Minimum Acceptable Water Quality Requirements” as found in this "Special Publication, and as found in "ASTM D6210-06", Table X1.1.
Table 3
Equation for Adding the Cat SCA to Conventional Coolant/Antifreeze at the Initial Fill
V × 0.045 = X
V is the total volume of the cooling system.
X is the amount of Cat SCA that is required. Table 4 is an example for using the equation that is in Table 3.
Table 4
Example of the Equation for Adding the Cat SCA to Conventional Coolant/Antifreeze at the Initial Fill
Total Volume of the Cooling System (V) Multiplication
Factor Amount of Cat SCA that is Required (X)
190 L
(50 US gal) × 0.045 8.5 L
(2.3 US gal) Adding the SCA to Conventional Coolant/Antifreeze for Maintenance
Conventional heavy-duty coolant/antifreeze of