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SEBU8311-01 63 Maintenance Section Cooling System Coolant (ELC) - Change 3. Fill the cooling system with clean water. Install the cooling system filler cap. 4. Start and run the engine at low idle until the temperature reaches 49 to 66 °C (120 to 150 °F). 5. Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap. Open the drain cock or remove the drain plug on the engine. Open the drain cock or remove the drain plug on the radiator. Allow the water to drain. Flush the cooling system with clean water. Fill 1. Close the drain cock or install the drain plug on the engine. Close the drain cock or install the drain plug on the radiator. NOTICE Do not fill the cooling system faster than 5 L (1.3 US gal) per minute to avoid air locks. Cooling system air locks may result in engine damage. 2. Fill the cooling system with Commercial Heavy-Duty Coolant. Add Supplemental Coolant Additive to the coolant. For the correct amount, refer to the Operation and Maintenance Manual, “Fluid Recommendations” topic (Maintenance Section) for more information on cooling system specifications. Do not install the cooling system filler cap. 3. Start and run the engine at low idle. Increase the engine rpm to high idle. Run the engine at high idle for one minute in order to purge the air from the cavities of the engine block. Stop the engine. 4. Check the coolant level. Maintain the coolant level within 13 mm (0.5 inch) below the bottom of the pipe for filling. Maintain the coolant level in the expansion bottle (if equipped) at the correct level. 5. Clean the cooling system filler cap. Inspect the gasket that is on the cooling system filler cap. If the gasket that is on the cooling system filler cap is damaged, discard the old cooling system filler cap and install a new cooling system filler cap. If the gasket that is on the cooling system filler cap is not damaged, use a suitable pressurizing pump in order to pressure test the cooling system filler cap. The correct pressure for the cooling system filler cap is stamped on the face of the cooling system filler cap. If the cooling system filler cap does not retain the correct pressure, install a new cooling system filler cap. 6. Start the engine. Inspect the cooling system for leaks and for correct operating temperature. i02595733 Cooling System Coolant (ELC) - Change
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. Dispose of all fluids according to Local regulations and mandates. NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. Clean the cooling system and flush the cooling system before the recommended maintenance interval if the following conditions exist: • The engine overheats frequently. • Foaming is observed. • The oil has entered the cooling system and the coolant is contaminated. • The fuel has entered the cooling system and the coolant is contaminated. Note: When the cooling system is cleaned, only clean water is needed when the ELC is drained and replaced. Note: Inspect the water pump and the water temperature regulator after the cooling system has been drained. This is a good opportunity to replace the water pump, the water temperature regulator and the hoses, if necessary. |