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Use only Cat products or commercial products that have passed Cat EC-1 specification for pre-mixed or concentrated coolants.Use only Cat ELC Extender with Cat ELC.Do NOT use conventional SCA with Cat ELC. Mixing Cat ELC with conventional coolants and/or conventional SCA reduces the Cat ELC service life.Do NOT mix brands or types of coolant. Do NOT mix brands or types of SCA and/or brands or types of extenders. Different brands or types may use different additive packages to meet the cooling system requirements. Different brands or types may not be compatible.Failure to follow the recommendations can reduce cooling system component life unless appropriate corrective action is performed.
Test the glycol concentration in the coolant and test the nitrite concentration in the coolant. Follow the maintenance information provided in this Special Publication, "Coolant and General Maintenance Recommendations" section.During daily maintenance, use the premixed Cat ELC as a cooling system top-off. This top-off will bring the coolant up to the proper level. Use Cat ELC Concentrate to restore the proper glycol concentration in the coolant system. This addition should be done before the engine is exposed to freezing temperatures. Do not use a conventional coolant to top-off a cooling system that is filled with Cat ELC.Do not use a conventional coolant to top-off a cooling system that is filled with Cat ELC.Cat ELC Extender
Cat ELC Extender is added to the cooling system halfway through the Cat ELC or Cat ELI service life. Treat the cooling system with Cat ELC Extender at 6000 hours or one half of the coolant service life. Refer to your machine Operation and Maintenance Manual for exceptions. Refer to the “Part Number of Coolant” table in this Special Publication, "Coolant Recommendations" article for available quantities and part numbers.Use the formula in Table 1 to determine the proper amount of Cat ELC Extender for your cooling system. Refer to Operation and Maintenance Manual, "Refill Capacities and Recommendations" in order to determine the capacity of the cooling system.
Table 1
Formula For Adding Cat ELC Extender To Cat ELC
V × 0.02 = X
V is the total capacity of the cooling system.
X is the amount of Cat ELC Extender that is required. Table 2 is an example for using the formula that is in Table 1. This example is based on the capacity of a D8R Track-Type Tractor with a cooling system capacity of 92 L (24.3 US gal).
Table 2
Example Of The Equation For Adding Cat ELC Extender To Cat ELC
Total Volume of the Cooling System (V) Multiplication
Factor Amount of Cat ELC Extender that is Required (X)
946 L (250 US gal) × 0.02 19 L (5 US gal)
When using Cat ELC, do not use conventional SCAs, or, if equipped, SCA maintenance elements. In order to avoid SCA contamination of an ELC system, remove the SCA element base and plug off or bypass the coolant lines.
Cat ELC Cooling System Cleaning
Note: If the cooling system is already using Cat ELC, cleaning agents are not required at the specified coolant change interval. Cleaning agents