DOOR GP-ACCESS 5474745 - Caterpillar

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 O S coolant analysis can be done at your Cat dealer. Cat S O S coolant analysis is the best way to monitor the condition of your coolant and your cooling system. S O S coolant analysis is a program that is based on periodic samples.
Table 9
Recommended Interval
Type of Coolant Level 1 Level 2
Cat DEAC
Conventional Heavy-Duty Coolants Every 250 hours Yearly(1)
Cat ELC
Cat ELI
Commercial EC-1 Coolants Optional Yearly(1)
(1) The Level 2 Coolant Analysis should be performed sooner if a problem is suspected or identified.Note: Check the SCA (Supplemental Coolant Additive) of the conventional coolant at every oil change or at every 250 hours. Perform this check at the interval that occurs first.S O S Services Coolant Analysis (Level 1)
A coolant analysis (Level 1) is a test of the properties of the coolant.The following properties of the coolant are tested:
Glycol concentration for freeze protection and boil protection
Ability to protect from erosion and corrosion
pH
Conductivity
Visual analysis
Odor analysisThe results are reported, and appropriate recommendations are made.S O S Services Coolant Analysis (Level 2)
A coolant analysis (Level 2) is a comprehensive chemical evaluation of the coolant. This analysis is also a check of the overall condition of the cooling system.The S O S coolant analysis