ELBOW A EXH 1H0519 - Caterpillar

Commercial Heavy-Duty Coolant/Antifreezes and SCA
If Caterpillar DEAC is not used, select a heavy-duty coolant/antifreeze with a low silicate content that meets "ASTM D 4985" or "ASTM D 5345". When a commercial heavy-duty coolant/antifreeze is used, the system must be treated with a Caterpillar SCA to a concentration level that is between 3 percent and 6 percent by volume of the system. If a Caterpillar SCA is not used, select a commercial SCA with a minimum concentration of 1200 mg/L (70 grains per gallon) or 1200 parts per million of nitrite in the cooling system. Follow the SCA recommended guidelines for the maintenance of the coolant. In all cases, the Caterpillar guidelines for acceptable water must be followed.Note: When you are not using a Caterpillar DEAC, the cooling system must be drained once during every year. The cooling system must be flushed during every year as well.Heavy-Duty Coolant/Antifreeze Cooling System Maintenance
Never operate without thermostats in the cooling system. Thermostats maintain the engine coolant at the proper operating temperature. Cooling system problems can develop without thermostats.
Check the solution of coolant/antifreeze (glycol concentration) frequently in order to ensure adequate freeze protection and protection from boiling. To check the concentration of glycol, Caterpillar recommends the use of a 1U-7298 Coolant Tester Group for degrees Celsius or 1U-7297 Coolant Tester Group for degrees Fahrenheit. Consult your Caterpillar dealer for information on coolant testers.