24. SERVICE PROCEDURE 24.1.8 REFILLING AN OVERHEATED SYSTEM Do not add coolant to the radiator of an overheated engine unless absolutely necessary. However, if necessary: 1. Remove the radiator cap. Refer to “RADIATOR CAP” in this section. 2. Be sure all the drains are closed. 3. Add hot coolant to the radiator slowly until full. 4. Remove the reserve tank cap. 5. Add coolant to the reserve tank until the level is between FULL and LOW marking on the tank. 6. When coolant level remains fixed between the FULL and LOW on the reserve tank, install the reserve tank cap. 7. Run the engine 8. Stop the engine 9. Check for leaks and coolant level in the reserve tank.
24.1.9 CLEANING THE RADIATOR Minor internal sludge accumulations will be removed when flushing the cooling system. When internal accumulations are found that cannot be removed by normal flushing methods, consult your distributor. Remove all bugs and dirt from the radiator core, using compressed air. Direct the flow through the core, opposite to the normal direction of air flow. 24.1.10 CLEANING THE RADIATOR PRE-SCREEN 1. Remove the bolts retaining the radiator pre-screen and remove the pre-screen. 2. Clean the pre-screen with water under pressure. 3. Reinstall the pre-screen and retaining bolts.
PC450-ENG 3-31 WARNING Use extreme caution when adding coolant to a hot radiator to avoid being burned. Wear gloves and goggles and keep away from the filler neck.