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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 filler cap slowly to relieve pressure only when engine is stopped and radiator 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 Conditioner contains alkali. Avoid contact with skin and eyes. |
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Do not change the coolant until you read and understand the cooling system information in Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations". Failure to do so could result in damage to the cooling system components. |
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Mixing 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 see the topic Extended Life Coolant (ELC) in the Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations". |
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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 product. 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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
If the coolant in the machine is changed to Extended Life Coolant (ELC) from another type of coolant, refer to Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Cat Extended Life Coolant (ELC)".
If the coolant is dirty or if you observe any foaming in the cooling system, drain the coolant before the recommended interval.
- Park the machine on a level surface and engage the parking brake. Stop the engine. Allow the engine to cool.
- Loosen the cooling system pressure cap slowly in order to release the pressure. Remove the cooling system pressure cap.
- The coolant drain valve is located behind guard (2) . Remove access cover (1) for the coolant drain valve.
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| Illustration 1 | g01562993 |
- Open the coolant drain valve. Drain the coolant into a suitable container.
- Flush the cooling system with clean water until the draining water is transparent.
- Close the coolant drain valve. Install the access cover.
- Add ELC. Refer to the following topics:
- Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Cooling System Specifications"
- Operation and Maintenance Manual, "Capacities (Refill)"
- Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Cooling System Specifications"
- Start the engine. Operate the engine without the cooling system pressure cap until the water temperature regulator opens and the coolant level stabilizes.
- Check the coolant level. The radiator is full when the sight glass is completely covered. Also, the radiator is full when the coolant level reaches the top of the angled cut on the filler tube. Refer to Operation and Maintenance Manual, "Cooling System Coolant Level - Check".
- Inspect the gasket of the cooling system pressure cap. If the gasket is damaged, replace the gasket.
- Install the cooling system pressure cap.
- Stop the engine.