Caterpillar DEAC is formulated with the correct amount of Caterpillar Supplemental Coolant Additive (SCA). Do not use SCA at the initial fill when DEAC is used. The coolant that is in Caterpillar engines should be sampled after every 250 hours of operation. The results of the coolant sample will regulate the additions of the SCA. The life of the coolant for the Caterpillar DEAC is 3000 hours or every two years.
Caterpillar DEAC is available as either a concentrate or a 1:1 premixed cooling solution. If concentrated Caterpillar DEAC is used, Caterpillar recommends dilution with distilled water or with deionized water. If distilled water is not available or deionized water is not available, refer to General Coolant Information in order to determine the requirements for acceptable water.
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 D4985" or "ASTM D5345". When a commercial heavy-duty coolant/antifreeze is used, the system must be treated with Caterpillar SCA. Maintain a concentration level in the cooling system that is between 3 percent and 6 percent by volume. If Caterpillar SCA is not used, select a commercial SCA. The commercial SCA must have a minimum concentration of nitrates. The minimum concentration of nitrates must be 1200 mg per Liter (70 grains per gallon) or 1200 parts per million. Follow the recommended guidelines for adding SCA when you maintain the coolant. In all cases, the Caterpillar guidelines for acceptable water must be followed.
Note: You must drain the cooling system once per year if Caterpillar DEAC is not used. The cooling system must be flushed at this time as well.
Cooling System Maintenance
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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. Check the glycol level of the coolant system with a 366 075.0 Coolant/Battery Tester (C°). Consult your CLAAS dealer for information on coolant testers.