ROD AS 4321862 - Caterpillar

Use of water that does not meet the recommendations for the cooling system will damage the cooling system.Do not use these types of water in the cooling system: sea water, softened water that has been conditioned with salt, hard water and tap water.Only use water that meets the recommendations for the cooling system.
If you are not sure about the properties of your water, consult one of the following sources for a water analysis:
Caterpillar dealer
Local water utility company
Agricultural agent
Independent laboratoryGlycol
Do not use Extended Life Coolant (ELC) with Caterpillar Gas Engines.ELC was not formulated for use in Caterpillar Gas Engines.Use only the coolant/antifreeze that is recommended.
Preferred - Caterpillar Natural Gas Engine Coolant (NGEC)Alternatively, use Caterpillar Diesel Engine Antifreeze/Coolant (DEAC) or a commercial heavy-duty coolant/antifreeze that meets "ASTM D6210" or "ASTM D4985" specifications.
Do not use a commercial coolant/antifreeze that only meets the ASTM "D3306" specification. This type of coolant/antifreeze is made for light duty automotive applications.Use only the coolant/antifreeze that is recommended.
Acceptable - In applications that do not require protection from boiling or from freezing, a mixture of Caterpillar SCA and water that meets the properties that are listed in Table 4 is acceptable.Note: The preferred coolant/antifreeze and the acceptable mixture of SCA and water require different concentrations of SCA. Refer to the Special Publication, SEBU6400, "Supplemental Coolant Additive (SCA)" topic.Table 5 is a list of the coolant/antifreeze that is recommended for Caterpillar Gas Engines. The service life of the coolant/antifreeze that is used in Caterpillar Gas Engines is also listed. To achieve this service life, the coolants must be properly maintained. The maintenance program includes S O S coolant analysis.
Table 5
Recommended Coolant/Antifreeze and Service Life of the Coolant/Antifreeze
Coolant/Antifreeze Service Life (1)
Caterpillar NGEC Three Years
Caterpillar DEAC
Commercial Heavy-Duty Coolant/Antifreeze that meets "ASTM D6210" Two Years
Commercial Heavy-Duty Coolant/Antifreeze that meets "ASTM D4985" One Year
Caterpillar SCA and Water Two Years
Commercial SCA and Water One Year
(1) The service life of coolant is also limited by use (service hours). Refer to the specific engine's Operation and Maintenance Manual, "Maintenance Interval Schedule".Additives
Preferred - Caterpillar Supplemental Coolant Additive (SCA)Acceptable - A commercial SCA that provides 1200 mg/L (70 grains per US gal) or 1200 ppm of nitrites in the final mixture of coolant/antifreezeNote: A 50/50 concentration of Caterpillar NGEC or of Caterpillar DEAC does not require a treatment with an SCA at the initial fill. Commercial heavy-duty coolant/antifreeze that meets "ASTM D6210" or "ASTM D4985" specifications may require a treatment with an SCA at the initial fill. Read the label or the instructions that are provided by the OEM of the product.To ensure that the correct amount of SCA is in the cooling system, the concentration of SCA must be tested on a scheduled basis. Obtain an S O S coolant analysis (Level 1) or use a test kit to check the concentration of the SCA according to this Operation and Maintenance Manual, "Maintenance Interval Schedule".For further information on coolant, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations".Coolant Capacities
To properly maintain the cooling system,