101 Maintenance Section Cooling System Coolant (ELC) - Change Reference: Refer to Operation and Maintenance Manual, “Cooling System Water Temperature Regulator - Replace” for the correct procedure. NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, test- ing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before open- ing any compartment or disassembling any compo- nent containing fluids. 5. Fill the cooling system with a solution which consists of clean water and cooling system cleaner.
The concentration of the cooling system cleaner in the solution should be between 6 percent and 10 percent. 6. Start the engine. Run the engine for 90 minutes. Refer to Special Publication, NENG2500, “Caterpillar Tools and Shop Products Guide” for tools and supplies suitable to collect and contain fluids on Caterpillar products. 7. Stop the engine. Drain the cleaning solution into a suitable container for disposal. Dispose of all fluids according to local regulations and mandates. 8. While the engine is stopped, flush the cooling system with water. Flush the system until the draining water is clear. Install the drain plug.
NOTICE Mixing ELC with other products that do not meet Caterpillar EC-1 specifications reduces the effective- ness of the coolant and shortens coolant service life. 9. Add the coolant solution. Refer to Operation and Maintenance Manual, “Capacities (Refill)” for the capacity of the cooling system. Use only Caterpillar products or commercial products that have passed the Caterpillar EC-1 specification for pre-mixed or concentrate coolants. Use only Caterpillar Extender with Caterpillar ELC. Note: If you are using Caterpillar antifreeze, do not add the liquid supplemental coolant additive at this time. 10. Start the engine.
Run the engine without the cooling system pressure cap until the water temperature regulator opens and the coolant level stabilizes. Failure to follow these recommendations can result in shortened cooling system component life. Reference: For information about the addition of Extender to your cooling system, see Operation and Maintenance Manual, “Cooling System Coolant Extender (ELC) - Add” or consult your Caterpillar dealer. 11. Clean the cooling system pressure cap and install the cooling system pressure cap. 12. Stop the engine. Close the engine hood. If an Extended Life Coolant was previously used, flush the cooling system with clean water. No other cleaning agents are required.
Use the following procedure to change the Extended Life Coolant. i01558476 Cooling System Coolant (ELC) - Change SMCS Code: 1350-044-NL Pressurized system: Hot coolant can cause seri- ous burn. To open cap, stop engine, wait until ra- diator is cool. Then loosen cap slowly to relieve the pressure. g00809863 Illustration 150 The cooling system pressure cap is located under the hood at the rear of the machine.