ENGINE MAINTENANCE - Cooling System Maintenance The cooling system in your vehicle was factory filled with extended life coolant that meets or exceeds all ASTM D6210 and Caterpillar EC-1 requirements. PACCAR recommends only using a 50/50 mixture of distilled water and ELC when cooling system service is required. A 50/50 mixture of ELC and distilled water will provide freeze protection down to –34°F (–36.7°C), which is adequate for most locations in North America. For extremely cold operating conditions, a 60/40 mixture (coolant/water ratio) can be used to provide freeze protection down to -62°F (-52.2°C).
Unless otherwise optioned, factory fill coolant is an ethylene glycol, nitrited organic acid technology (NOAT) extended life coolant (ELC) formulation at a 50:50 coolant-to-distilled water mixture. The factory fill exceeds ASTM D6210 and Caterpillar EC-1 requirements. Maintaining coolant chemistry and freeze protection is critical to engine and cooling system component health and longevity. with large amounts of water for 15 mi- nutes. Avoid prolonged or repeated contact with skin. In case of contact, immediately wash skin with soap and water. DO NOT take internally. If swal- lowed, seek immediate medical atten- tion. DO NOT induce vomiting.
Failure to comply may result in death, person- al injury, equipment or property dam- age. NOTE Coolant is harmful to the environment. Unused coolant must be stored as a toxic hazardous material in leakproof containers. Used coolant must be processed as industrial chemical waste. Please follow HAZMAT guide- lines with both used and unused cool- ants. 2 CAUTION The engine cooling system has very specific maintenance and inspection requirements. Failure to follow require- ments can damage the engine. Engine damage can include but is not limited to freezing, boiling, corrosion, pitted cylinder liners. This information is found in the engine manufacturers owner’s manual.
It is the owner’s re- sponsibility to follow all requirements listed in the engine manufacturers owner’s manual. CAUTION Use of non-genuine coolant filters can cause severe engine damage. Concentration Check the level of freeze/boilover protection, which is determined by the glycol concentration. Use a glycol refractometer to determine glycol level. Add coolant to obtain the coolant/water ratio required to provide the protection you need. A 50/50 mix of coolant and water is adequate for most applications. For extremely cold operating conditions, the ratio can be adjusted to a higher concentration of coolant. WARNING Coolant is toxic. DO NOT get the fluid in eyes.
If contact occurs, flood eyes Y53-1166-1G1 (08/2018) 43