GASKET 1958461 - Caterpillar

Do Not Mix Brands and/or Types of Products.Mixing other products with Cat ELC reduces the effectiveness of the Cat ELC and shortens the Cat ELC service life. Use only Cat products or commercial products that have passed the Caterpillar EC-1 specification for premixed or concentrate coolants, and that have also passed the additional requirements for EC-1 as found in the coolant section of this Special Publication. Use only Cat ELC Extender with Cat ELC. Do NOT mix brands or types of coolants. Do NOT mix brands or types of SCA. Do NOT mix brands or types of extenders. Do NOT mix SCAs and extenders.Failure to follow these recommendations can result in shortened cooling system component life.
Use Only Approved SCAs and Extenders.Conventional coolants require the maintenance addition of SCA throughout their expected life. Do NOT use an SCA with a coolant unless specifically approved by the coolant supplier for use with their coolant. It is the responsibility of the coolant manufacturer to ensure compatibility and acceptable performance.In order to ensure expected performance, EC-1 coolants require the one time maintenance addition of an extender at coolant service mid-life. Do NOT use an extender with a coolant unless the extender has been specifically approved for use by the coolant manufacturer for use with the coolant. It is the responsibility of the coolant manufacturer to ensure compatibility and acceptable performance.Failure to follow these recommendations can result in shortened cooling system component life.
The following two types of coolants may be used in Cat diesel engines:Preferred - Cat ELC (Extended Life Coolant) or a commercial extended life coolant that meets the Caterpillar EC-1 (Engine Coolant -1) specification.Acceptable - Cat DEAC (Diesel Engine Antifreeze/Coolant) or a commercial heavy-duty antifreeze/coolant that meets "ASTM D4985-05" or "ASTM D6210-06" specificationsChemical Requirements for New Coolant (50 volume % diluted)
Preferred Coolants - Cat ELC or EC-1
Organic Additive Technology (OAT) based on a combination of a monocarboxylic acid and a dicarboxylic acid
Phosphate, borate, and silicate free
Minimum typical tolyltriazole level of 900 ppm
Minimum typical nitrite level of 500 ppm
Coolants that are prediluted at the coolant manufacturer must be diluted with water that meets Reagent 4 ("ASTM D1193") requirementsAcceptable Coolants - Cat DEAC, "ASTM D6210-06", or "ASTM D4985-05" (after the addition of the specification required SCA precharge)
A minimum concentration of nitrite (as NO2-) of 1200 ppm
A minimum silicon concentration of 100 ppm
A maximum silicon concentration of 275 ppm
Coolants that are prediluted at the coolant manufacturer must be diluted with water that meets Reagent 4 ("ASTM D1193") requirementsNote: "ASTM D4985" and "ASTM D6210" require coolants that are properly dosed with SCA and that are in a properly maintained cooling system in normal service to be suitable for use for a minimum of one year ("ASTM D4985") and 2 years ("ASTM D6210"). The suitability for use requirement is the direct responsibility of the coolant manufacturer and SCA manufacturer.
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