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SEBU8311-01 47 Maintenance Section Refill Capacities Table 28 Ethylene Glycol Concentration Freeze Protection 50 Percent −36 °C (−33 °F) 60 Percent −51 °C (−60 °F) NOTICE Do not use propylene glycol in concentrations that ex- ceed 50 percent glycol because of propylene glycol’s reduced heat transfer capability. Use ethylene glycol in conditions that require additional protection against boiling or freezing. Table 29 Propylene Glycol Concentration Freeze Protection 50 Percent −29 °C (−20 °F) To check the concentration of glycol in the coolant, measure the specific gravity of the coolant. Coolant Recommendations • ELC ____________________________ Extended Life Coolant • SCA ___________________ Supplement Coolant Additive • ASTM __________________________________________ American Society for Testing and Materials The following two coolants are used in Perkins diesel engines: Preferred – Perkins ELC Acceptable – A commercial heavy-duty antifreeze that meets “ASTM D4985” specifications NOTICE Do not use a commercial coolant/antifreeze that on- ly meets the ASTM D3306 specification. This type of coolant/antifreeze is made for light automotive appli- cations. Perkins recommends a 1:1 mixture of water and glycol. This mixture of water and glycol will provide optimum heavy-duty performance as a antifreeze. This ratio may be increased to 1:2 water to glycol if extra freezing protection is required. Note: A commercial heavy-duty antifreeze that meets “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. In stationary engine applications and marine engine applications that do not require anti-boil protection or freeze protection, a mixture of SCA and water is acceptable. Perkins recommends a six percent to eight percent concentration of SCA in those cooling systems. Distilled water or deionized water is preferred. Water which has the recommended properties may be used. Table 30 Coolant Service Life Coolant Type Service Life Perkins ELC 6,000 Service Hours or Three Years Commercial Heavy-Duty Antifreeze that meets “ASTM D4985” 3000 Service Hours or Two Years Perkins POWERPART SCA 3000 Service Hours or Two Years Commercial SCA and Water 3000 Service Hours or Two Years ELC Perkins provides ELC for use in the following applications: • Heavy-duty spark ignited gas engines • Heavy-duty diesel engines • Automotive applications The anti-corrosion package for ELC is different from the anti-corrosion package for other coolants. ELC is an ethylene glycol base coolant. However, ELC contains organic corrosion inhibitors and antifoam agents with low amounts of nitrite. Perkins ELC has been formulated with the correct amount of these additives in order to provide superior corrosion protection for all metals in engine cooling systems. ELC is available in a 1:1 premixed cooling solution with distilled water. The Premixed ELC provides freeze protection to −36 °C (−33 °F). The Premixed ELC is recommended for the initial fill of the cooling system. The Premixed ELC is also recommended for topping off the cooling system. Containers of several sizes are available. Consult your Perkins distributor for the part numbers. |