SEBU7899-05 69 Maintenance Section Coolant - Change 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 valve (if equipped) or remove the cooling system drain plugs. Allow the water to drain. Flush the cooling system with clean water. Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. Refer to the Specifications Manual, SENR3130, “Torque Specifications” for more information on the proper torques. NOTICE Improper or incomplete rinsing of the cooling system can result in damage to copper and other metal com- ponents.
To avoid damage to the cooling system, make sure to completely flush the cooling system with clear wa- ter. Continue to flush the system until all signs of the cleaning agent are gone. Systems Filled with Cat DEAC, Conventional Coolant which does not Meet the Cat EC-1 Requirements, or Supplemental Coolant Additive (SCA) and Water 9. 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 valve (if equipped) or remove the cooling system drain plugs. Allow the water to drain. Flush the cooling system with clean water.
If equipped, be sure to flush the heater and any related supply and return lines. Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. Refer to the Specifications Manual, SENR3130, “Torque Specifications” for more information on the proper torques. 3. Flush the cooling system with clean water in order to remove any debris. 4. Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. Refer to the Specifications Manual, SENR3130, “Torque Specifications” for more information on the proper torques. Fill the Cooling System NOTICE Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.
NOTICE Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks. 5. Fill the cooling system with a mixture of clean water and Cat Fast Acting Cooling System Cleaner. 1. Fill the cooling system. Refer to this Operation and Maintenance Manual, “Fluid Recommendations” for more information on cooling system specifications Refer to this Operation and Maintenance Manual, “Refill Capacities” for information about the capacity of the cooling system. Do not install the cooling system filler cap. 6. Choose 1 of the following options. Add 0.5 L (1 pint) of cleaner per 15 L (4 US gal) of the cooling system capacity. 2. Start and run the engine at low idle.
Increase the engine rpm to high idle. Run the engine at high idle for 1 minute in order to purge the air from the cavities of the engine block. Stop the engine. For cooling systems with heavy deposits or plugging, add 0.5 L (1 pint) of cleaner per 3.8 to 7.6 L (1 to 2 US gal) of the cooling system capacity. 3. 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 within 13 mm (0.5 inch) to the proper level on the sight glass (if equipped). 7. Install the cooling system filler cap. 8. Start and run the engine at low idle for a minimum of 30 minutes.
For cooling systems with heavy deposits or plugging, run the engine for 90 minutes. The coolant temperature should be at least 82 °C (180 °F).