HOSE AS 1874606 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Cooling System
Change Coolant - Clean System
Do not change the coolant until you read and understand the material in the "Cooling System Specifications" section.
Drain the coolant earlier whenever the coolant is dirty or foaming is observed. 1. Pull the handle to release the radiator guard. Tilt the guard forward. 2. Remove the radiator cap slowly to relieve pressure. 3. Open the drain valve and allow the coolant to drain. Drain valve is located under the radiator.4. Close the drain valve. Fill the system with clean water and a 6 to 10% concentration of cooling system cleaner.5. Start and run the engine for 90 minutes. Stop the engine and drain the cleaning solution.6. Flush the system with water, with the engine stopped, until the draining water is clear.7. Close the drain valve.8. Add the coolant solution. See "Cooling System Specifications" and "Lubricant Viscosities and Refill Capacities." Do not add supplemental coolant additive or change element at this time, unless you are not using Caterpillar Antifreeze which contains additive.9. Start the engine and operate it with the radiator cap off, until the thermostat opens and the level stabilizes.10. Maintain the coolant level in the green range of the sight gauge.11. Install the cap.12. Close the radiator guard.13. Stop the engine.Clean the Cooling System Relief Valve
Clean or replace the relief valve if the system overheats or loss of coolant is observed. 1. Remove the radiator cap slowly to relieve pressure.2. Inspect the relief valve and the gasket in the radiator cap. Replace the radiator cap, if the valve or the gasket are worn or damaged.Clean Outside of Radiator Fins
Compressed air is preferred, but high pressure water or steam can be used to remove dust, leaves and general debris from radiator fins.