SWITCH GP-PRESSURE 1536617 - Caterpillar

If Caterpillar DEAC is not used, select a coolant/antifreeze with low silicate content for heavy-duty applications that meets "TMC RP329", "ASTM D5345" or "ASTM D4985" specifications.Note: When you are not using Caterpillar DEAC the cooling system must be drained one time during every year. The cooling system must be flushed at this time as well.When a heavy-duty coolant/antifreeze is used, the cooling system should be treated with three to six percent Caterpillar SCA by volume. Refer to this publication, "Conventional Coolant/Antifreeze Cooling System Maintenance" topic (Maintenance Section).If Caterpillar SCA is not used, select a commercial SCA. The commercial SCA must provide a minimum of 1200 mg/L or 1200 ppm (70 grains per gallon) of nitrites in the final coolant mixture.Coolant/antifreezes for heavy-duty applications that meet "ASTM D5345" or "ASTM D4985" specifications MAY require treatment with SCA at the initial fill. These coolants WILL require treatment with SCA on a maintenance basis.Coolant/antifreezes for heavy-duty applications that meet "TMC RP329" specifications do not require treatment with SCA at the initial fill, but the SCA should be treated at the regular maintenance intervals.When concentrated coolants are mixed, Caterpillar recommends mixing the concentrate with distilled water or with deionized water. If distilled water or deionized water is not available, refer to the table in this publication, "General Coolant Information" topic (Maintenance Section).