ENGINE AR 2Y7595 - Caterpillar

VALIGN="middle" ALIGN="center">Acceptable Cat DEAC (Cat Diesel Engine Antifreeze/Coolant) 3000 hours or 3 years SCA (Supplemental coolant additive) at maintenance intervals
Min requirements for fully formulated Heavy Duty Commercial coolants "ASTM D6210" and
Nitrite (as NO2) concentration: Minimum of 1200 ppm (70 grains/US gal) and maximum of 2400 ppm (140 grains/US gal)
Silicon concentration: minimum of 100 ppm (mg/kg) and maximum of 275 ppm (mg/kg) 3000 hours or 2 years SCA at maintenance intervals
Min requirements for Commercial coolants requiring SCA precharge "ASTM D4985" and(1)
Nitrite (as NO2) concentration: Minimum of 1200 ppm (70 grains/US gal) and maximum of 2400 ppm (140 grains/US gal)
Silicon concentration: minimum of 100 ppm (mg/kg) and maximum of 275 ppm (mg/kg) 3000 hours or 1 year SCA at initial fill and SCA at maintenance intervals
(1) New Coolants at 50 volume percent diluted. Coolants that are prediluted at the coolant manufacturer must be diluted with water that meets Reagent 4 "ASTM D1193" requirements.
(2) Maintain the in-service coolant at the given limits.
(3) When referring to the service hours, use the interval that occurs first. These coolant change intervals are only achievable with annual S O S Services Level 2 coolant sampling analysis.
Table 8
Special Requirements for Cat C7 through C32 Separate Circuit Aftercooled (SCAC) Marine Engines(1)(2)
Maximum of 20% glycol is allowed in the aftercooler circuit (not applicable to the jacket water circuit which is capable of 50% glycol).
Water mixed with ELI or water mixed with SCA are not recommended for use in applications that require freeze protection.(3)(4)(5)
(1) Heat exchanger cooled and keel cooled configurations
(2) For freezing protection of −5° C (23° F) temperatures and lower, consult your Cat dealer for guidance.
(3) For applications that allow the use of Cat ELI and water, a minimum of 7.5% of Cat ELI is recommended.
(4) For applications that allow the use of SCA and water, a minimum of 6% to a maximum of 8% concentration of Cat SCA is recommended.
(5) Refer to Operation and Maintenance Manual, "Cat Commercial Diesel Engine Fluids Recommendations" SEBU6251 for an example of the amount of ELI to add when diluting ELC.
Use Only Approved SCAs and ExtendersConventional coolants require the maintenance addition of SCA throughout the expected life of the coolants. Do NOT use an SCA with a coolant unless approved specifically by the coolant supplier. The coolant manufacturer is responsible for ensuring compatibility and acceptable performance.To help 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 approved specifically for use by the coolant manufacturer. The coolant manufacturer is responsible for ensuring compatibility and acceptable performance.Failure to follow these recommendations can result in shortened cooling system component life.
Cat ELC can be recycled into conventional coolants.S O S Services Coolant Analysis
Testing the engine coolant is important to ensure that the engine is protected from internal cavitation and corrosion. The analysis also tests the ability of the coolant to protect the engine from boiling and freezing. S