SPIDER AS-FAN 7N4805 - Caterpillar

the maintenance information provided in this Special Publication, "Coolant and General Maintenance Recommendations"section.Cat recommends using Cat DEAC (Diesel Engine Antifreeze/Coolant) for cooling systems that require a high performance conventional heavy-duty coolant/antifreeze. Cat DEAC is alkaline single-phase ethylene glycol type antifreeze that contains corrosion inhibitors and antifoam agents.Cat DEAC is formulated with the correct amount of Cat SCA (Supplemental Coolant Additive). Do not use Cat SCA at the initial fill when Cat DEAC is used at the recommended 50 percent by volume glycol or higher concentration with recommended water.Containers of several sizes are available. Consult your Cat dealer for the part numbers.If concentrated Cat DEAC is used, Caterpillar recommends mixing the concentrate with distilled water or with deionized water. If distilled water or deionized water is not available, use water which has the required properties. For the water properties, see this publication, "General Coolant Information".Note: Mix the concentrated Cat DEAC and water thoroughly prior to filling the cooling system.SCA is added to cooling systems that use conventional coolants for one of three reasons:
to precharge a new conventional coolant that is not fully Formulated. Cat DEAC is fully formulated and does not require SCA
to provide corrosion protection in water/SCA cooling systems
to recharge an in service conventional coolant on a maintenance basis to maintain proper inhibitor levelsConventional coolants typically require SCA additions at approximately 250-300 service hours. The use of SCA helps to prevent the following conditions from occurring:
Corrosion
Formation of mineral deposits
Cavitation erosion of the cylinder liners
Foaming of the coolantContainers of Cat SCA are available in several sizes. Refer to this Special Publication, "Conventional Coolant/Antifreeze Cooling System Maintenance" article for available quantities and part numbers.Note: Do not exceed a 6 percent maximum concentration of SCA. Maintain a 3 to 6 percent SCA concentration in the coolant.