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Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand. Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns. Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes. |
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Do not change the coolant until you read and understand the material in the Cooling System Specifications section. |
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Mixing Extended Life Coolant (ELC) with other products reduces the effectiveness of the coolant and shortens coolant life. Use only Caterpillar products or commercial products that have passed the Caterpillar EC-1 specifications for premixed or concentrate coolants. Use only Caterpillar Extender with Caterpillar ELC. Failure to follow these recommendations could result in the damage to cooling systems components. If ELC cooling system contamination occurs, refer to Operation and Maintenance, "Extended Life Coolant (ELC)" under the topic ELC Cooling System Contamination. |
Drain the coolant whenever the coolant is dirty or whenever foaming is observed.
- Slowly loosen the radiator cap in order to relieve the pressure. Slowly remove the radiator cap.
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| Illustration 1 | g00748348 |
- Open the drain valve. Allow the coolant to drain.
- Close the drain valve. Fill the system with a mixture of clean water and a 6% to 10% concentration of cleaner.
- Start the engine. Operate the engine for 90 minutes. Stop the engine. Drain the cleaning solution.
- Stop the engine. Flush the system. The water that drains from the system must be clear.
- Close the drain valve.
- Add the coolant solution. See Cooling System Specifications, Lubricant Viscosities and Refill Capacities.
Note: Do not add the supplemental coolant additive at this time or change the element at this time unless you are using Caterpillar Antifreeze.
- Start the engine. Operate the engine with the radiator cap off the engine. The thermostat must open and the coolant level must stabilize.
- Maintain the level of the coolant to 13 mm (0.5 inch) of the bottom of the fill pipe.
- Install the radiator cap.
- Stop the engine.