www.changlin.com.cn Coolant Recommendations Antifreeze SPECIFICATIONS-Use low silicate antifreeze which meets ASTM 4985 test (GM6038 spec.) criteria. CONCENTRATION-Antifreeze must be used in any climate for both freeze and boiling point protection, Cummins recommends a 50 percent concentration level (40 percent to 60 percent range) of ethylene glycol or propylene glycol in most climates. Antifreeze at 68 percent concentration provides the maximum freeze protection and must never be exceeded under any condition. Antifreeze protection decreases above 68 percent. CONCENTRATION TESTING-Antifreeze concentration must be checked using a refractometer (such as Fleetguard Part No. CC2800).
"Floating ball-type density testers or hydrometers are not accurate enough for use with heavy duty diesel cooling systems. COOLANT CHANGE RECOMMENDATION-The coolant must be drained and replaced every 385,000 km [240,000miles], 6,000 hours or 2 years (whichever occurs first) to eliminate buildup of harmful chemicals. Supplemental Coolant Additives SUPPLEMENTAL COOLANT ADDITIVES (SCA). Are recommended for all Cummins cooling systems. Antifreeze alone does not provide sufficient corrosion protection for heavy duty diesel engines. DCA4 is the recommended SCA for all Cummins engines.
Other brands can be used provided they provide adaquate engine protection and do not cause seal or gasket degredation or corrosion/fouling. SCA CONCENTRATION-The recommended concentration level of DCA 4 is 1.5 units per 3.7 liter [1 U. S.gallon]. The DCA4 concentration must never exceed 3.0 units per 3.7 liter [1 U. S.gallon] nor fall below 1.2 units per 3.7 liter [1 U. S.gallon], DCA4 FILTER CHANGE INTERVAL-Supplemental Coolant Additives deplete during normal engine operation. Cummins recommends that the level be maintained by installation of a service coolant filter on the engine at every 10,000 km [6,000 miles] 250 hours or 3 months interval.
142 / 149 pages Ethylene Glycol Propylene Glycol 40%=-23°C [-10°F] 40%= -21°C [-6°F] 50%=-37°C [-34°F] 50%= -33°C [-27°F] 60%=-54°C [-65° F] 60%= -49°C [-56°F] 68%=-71°C [-90° F] 68%=-63°C [-82°F]