HARNESS AS 4E2307 - Caterpillar

Do not use a commercial coolant/antifreeze that only meets the ASTM D3306 or D4656 specification. This type of coolant/antifreeze is made for light duty automotive applications.
The following coolants are the primary types of coolants that are used in Caterpillar Engines:Preferred - Caterpillar Extended Life Coolant (ELC) or a commercial extended life coolant that meets the Caterpillar EC-1 specificationAcceptable - Caterpillar Diesel Engine Antifreeze/Coolant (DEAC) or a commercial heavy-duty coolant/antifreeze that meets "ASTM D4985" or "ASTM D5345" specificationsCaterpillar recommends a 1:1 mixture of water and glycol. This mixture will provide optimum heavy-duty performance as a coolant/antifreeze.Note: Caterpillar DEAC DOES NOT require a treatment with an SCA at the initial fill. Commercial heavy-duty coolant/antifreeze that meets "ASTM D4985" or "ASTM D5345" 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.In stationary engine applications and marine engine applications that do not require protection from boiling or freezing, a mixture of SCA and water is acceptable. Caterpillar recommends a minimum of six percent to a maximum of eight percent SCA concentration in those cooling systems. Distilled water or deionized water is preferred. Water which has the required properties may be used. For the water properties, see this publication, "General Coolant Information" topic (Maintenance Section).Note: Table 1 is a list of the coolants that are recommended and the service life (calendar) of the coolants. 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" (Maintenance Section). To achieve this service life, the coolants must be properly maintained. The maintenance program includes S O S coolant analysis.
Table 1
Coolant Service Life
Coolant Type Service Life (1)
Caterpillar ELC Six Years
Caterpillar DEAC Three Years
Commercial Heavy-Duty Coolant/Antifreeze that meets "ASTM D5345" 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" (Maintenance Section).