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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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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
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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 . This machine was factory filled with Extended Life Coolant . |
Drain the coolant whenever the coolant is dirty or whenever foaming is observed.
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| Illustration 1 | g00371996 |
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| Illustration 2 | g00316011 |
- Slowly loosen the cap for the radiator and for the aftercooler in order to relieve system pressure. Remove the cap for the radiator and for the aftercooler.
- Open the drain valves for the jacket water cooling system and the aftercooler cooling system. Drain the coolant into a suitable container.
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| Illustration 3 | g00370394 |
- Close the drain valves. Fill the system with clean water and a 6 to 10% concentration of cooling system cleaner.
Note: When the drain valves are opened, the coolant will drain from both systems. Opening one drain valve will drain that system and the other system will remain partially full.
- Start the engine and operate the engine for 90 minutes. Stop the engine and drain the cleaning solution into a suitable container.
- When the engine is stopped, flush the system with water until the draining water is clear. Drain the water into a suitable container.
- Close the drain valves.
- Add the coolant solution.
- Operation and Maintenance Manual, "Cooling System Specifications"
- Operation and Maintenance Manual, "Refill Capacities"
- Operation and Maintenance Manual, "Cooling System Specifications"
- Start the engine. Run the engine without the filler cap. Run the engine until the thermostat opens and the coolant level stabilizes.
- Install the filler cap.
Note: If you are using Caterpillar antifreeze, do not add the supplemental coolant additive at this time and/or change the element at this time.