Refill Capacities Fluid Recommendations 40 SEBU9064 NOTICE Do not use propylene glycol in concentrations that ex- ceed 50 percent glycol because of the reduced heat transfer capability of propylene glycol. Use ethylene glycol in conditions that require additional protection against boiling or freezing. Table 19 Table 18 (1) Use the interval that occurs first. The cooling system must also be flushed out at this time. To check the concentration of glycol in the coolant, measure the specific gravity of the coolant. ELC Coolant Recommendations Perkins provides ELC for use in the following applications:
ELC Extended Life Coolant Heavy-duty spark ignited gas engines SCA Supplement Coolant Additive Heavy-duty diesel engines ASTM American Society for Testing and Materials Automotive applications The following two coolants are used in Perkins diesel engines: 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.
Preferred – Perkins ELC Acceptable – A commercial heavy-duty antifreeze that meets ASTM D6210 specifications ELC is available in a premixed cooling solution with distilled water. ELC is a 1:1 mixture. 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. NOTICE The 400F industrial engines must be operated with a 1:1 mixture of water and glycol. NOTICE Do not use a commercial coolant/antifreeze that only meets the ASTM D3306 specification. This type of coolant/antifreeze is made for light automotive applications.
Containers of several sizes are available. Consult your Perkins distributor for the part numbers. ELC Cooling System Maintenance Correct additions to the Extended Life Coolant Perkins recommends a 1:1 mixture of water and glycol. This mixture of water and glycol will provide optimum heavy-duty performance as an antifreeze. This ratio may be increased to 1:2 water to glycol if extra freezing protection is required. NOTICE Use only Perkins products for pre-mixed or concen- trated coolants. A mixture of SCA inhibitor and water is acceptable but will not give the same level of corrosion, boiling and, freezing protection as ELC.
Perkins recommends a 6 percent to 8 percent concentration of SCA in those cooling systems. Distilled water or deionized water is preferred. Water which has the recommended properties may be used Mixing Extended Life Coolant with other products re- duces the Extended Life Coolant service life. Failure to follow the recommendations can reduce cooling system components life unless appropriate corrective action is performed.
Coolant Service Life Coolant Type Service Life (1) Perkins ELC 6,000 Service Hours or Three Years Commercial Heavy-Duty Anti- freeze that meets ASTM D6210 3000 Service Hours or Two Years A Perkins approved SCA inhibitor 3000 Service Hours or Two Years Propylene Glycol Concentration Freeze Protection 50 Percent −29 °C (−20 °F)