COUPLER AS 2357401 - Caterpillar

Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.
Mixing ELC with other products will reduce the effectiveness of the coolant.This could result in damage to cooling system components.If Caterpillar products are not available and commercial products must be used, make sure they have passed the Caterpillar EC-1 specification for pre-mixed or concentrate coolants and Caterpillar Extender.
Note: The machine was shipped from the factory with Extended Life Coolant (ELC) in the cooling system.For information about the addition of Extender to your cooling system, see the Operation and Maintenance Manual, "Cooling System Coolant (ELC) Extender - Add" or consult your Cat dealer.Drain the coolant whenever the coolant is dirty or whenever the coolant is foaming.Allow the machine to cool before you change the coolant.
Open the engine hood. Refer to Operation and Maintenance Manual, "Access Doors and Covers". Note: The coolant tank is located in the engine compartment next to the engine air cleaner.
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Slowly loosen the cap in order to relieve system pressure. Remove the cap.
Remove the cover plate on the bottom of the engine compartment. Locate the drain for the engine coolant. Open the drain and allow the coolant to drain into a suitable container.
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Remove the access panel under the rear of the machine.
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Open the drain and allow the coolant to drain from the radiator into a suitable container.
Close the drain.
Replace the access panel.
Replace the thermostat. See Operation and Maintenance Manual, "Cooling System Water Temperature Regulator - Replace" for the process for replacing the thermostat.
Add the coolant solution directly to the coolant tank. Refer to Operation and Maintenance Manual, "Capacities - (Refill)". Refer to Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations". Note: Premix the coolant solution before filling the cooling system. The coolant solution should contain 50 percent coolant and 50 percent distilled water.Note: Add the coolant solution at a maximum rate of 5 liters per minute. Air may get trapped inside the engine block. A large amount of trapped air can cause localized heating to occur upon start-up. Localized heating may result in engine damage, which may lead to failure of the engine.
Start the engine. Run the engine without the radiator cap for 30 seconds. Stop the engine. Allow the engine to sit for 1 minute. Check the coolant level. If necessary, add coolant.
Check the coolant level in the coolant tank. Maintain the coolant level to the top mark on the tank.
Stop the engine. Inspect the cap for the coolant tank and the gasket. Replace the cap if the cap or the gasket is damaged. Install the cap.
Close the engine hood.