102 Maintenance Section Cooling System Coolant Additive (DEAC) - Add 1. Slowly loosen the cooling system pressure cap in order to relieve system pressure. 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. 2. Open the drain valve on the bottom of the radiator. The drain valve can be accessed from the left side of the machine. Allow the coolant to drain into a suitable container. 3.
Flush the cooling system with clean water until the draining water is clean. Close the drain valve. Refer to Special Publication, NENG2500, “Caterpillar Tools and Shop Products Guide” for tools and supplies suitable to collect and contain fluids on Caterpillar products. 4. Replace the water temperature regulator. Reference: Refer to Operation and Maintenance Manual, “Cooling System Water Temperature Regulator - Replace” for the correct procedure. Dispose of all fluids according to local regulations and mandates. 5. Add the Extended Life Coolant. Note: This procedure pertains to Caterpillar Diesel Engine Antifreeze/Coolant (DEAC) only.
This procedure does not pertain to machines that are shipped from the factory with Extended Life Coolant (ELC) or to machines that are maintained with Extended Life Coolant (ELC). Reference: Refer to Operation and Maintenance Manual, “Capacities (Refill)” for the refill capacity of the cooling system. 6. Start the engine. Run the engine without the cooling system pressure cap until the water temperature regulator opens and the coolant level stabilizes. Use an 8T-5296 Test Kit to check the concentration of the coolant. 7. Maintain the coolant level in the sight gauge of the radiator. 1. Open the rear engine hood.
Slowly loosen the cooling system pressure cap in order to relieve system pressure. Remove the cooling system pressure cap. 8. Install the cooling system pressure cap. Stop the engine. 2. If necessary, drain enough coolant from the radiator in order to allow the addition of the liquid supplemental coolant additive. The coolant drain valve is located on the bottom left side of the radiator. i01558454 Cooling System Coolant Additive (DEAC) - Add SMCS Code: 1352-544 3. Add 0.24 L (0.25 qt) of liquid supplemental coolant additive to the cooling system. 4. Clean the cooling system pressure cap and install the cooling system pressure cap. Close the engine hood. 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. i01558469 Cooling System Coolant Extender (ELC) - Add NOTICE Excessive additive (greater than the recommended 6% initial fill) together with concentrations of antifreeze greater than 60% cause deposits to form and can re- sult in radiator tube blockage and overheating. SMCS Code: 1352-544-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.