Close the drain valve

TM-5-3805-258-24-1 Loader Scoop Type DED 4x4 Articulated Frame Steer 2 1/2 Cubic Yard Bucket (CCE) Airborne/Airmobile Manual
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TM 5-3805-258-24-1 11. Flush the system with clean water until the draining water is clean. Do not run the engine while flushing 12. Close the drain valve and install all drain plugs, Fill the system with clean water. Start and run the engine for 5 14. Close the drain valve. Add the coolant slowly, 20 liters (5 U.S. gallons) per minute or less, to the proper level, See “Refill Capacities. ” Adding the coolant too fast will produce air pockets in the system. minutes. Stop the engine and drain the cooling system. Repeat this procedure, until the drained water is clean. 15. Run the engine with the radiator cap off until the coolant level stabilizes. 13. Mix the antifreeze solution to provide protection to the lowest expected outside temperature. Add 2 liters (2 quarts) of Caterpillar Cooling System Conditioner or equivalent. 1-26

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