CONTROL GP-HEATER 2372303 - Caterpillar

Use only clean water to flush the cooling system when Extended Life Coolant (ELC) is drained and replaced.Drain the Cooling System
Stop the engine and allow the engine to cool. Ensure that the engine will not start when the cooling system is drained.
Illustration 1 g00824061
Filler cap
Loosen the cooling system filler cap (1) slowly in order to relieve any pressure. Remove the cooling system filler cap.
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Locations of the drain plugs (2) Transmission oil cooler (3) Cylinder block
Remove drain plugs (2) and (3). Allow the coolant to drain.
Illustration 3 g00824084
Location of the drain plug and drain valve for the radiator
Remove drain plug (4) that is for the radiator.
Illustration 4 g00824094
Radiator drain valve
Remove the lockwire from radiator drain valve (5). Open the radiator drain valve. Allow the coolant to drain.
Dispose of used engine coolant properly or recycle. Various methods have been proposed to reclaim used coolant for reuse in engine cooling systems. The full distillation procedure is the only method acceptable by Caterpillar to reclaim the used coolant.
For information regarding the disposal and the recycling of used coolant, consult your Caterpillar dealer or consult Caterpillar Service Technology Group:Outside Illinois: 1-800-542-TOOLInside Illinois: 1-800-541-TOOLCanada: 1-800-523-TOOLClean the Cooling System
After the cooling system has been drained, flush the cooling system with clean water in order to remove any debris.
Close the radiator drain valve. Clean the drain plugs and install the drain plugs.
Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.
Fill the cooling system with clean water. Install the cooling system filler cap. Start the engine. Operate the engine until the temperature reaches 49 °C (120 °F) to 66 °C (150 °F).
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. Remove drain plugs (2), (3) and (4). Refer to Illustrations 2 and 3. Open the radiator drain valve. Allow the water to drain.
Flush the cooling system with clean water until the water that drains is clean. Close the radiator drain valve. Clean the drain plugs and install the drain plugs.
Fill the cooling system with clean water. Install the cooling system filler cap. Start the engine. Operate the engine until the temperature reaches 49 °C (120 °F) to 66 °C (150 °F).
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. Remove drain plugs (2), (3) and (4). Refer to Illustrations 2 and 3. Open the radiator drain valve. Allow the water to drain.
Flush the cooling system with clean water until the water that drains is clean. Close the radiator drain valve. Install a new lockwire on the radiator drain valve. Clean the drain plugs and install the drain plugs.Fill the Cooling System
Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.
Fill the cooling system with Extended Life Coolant (ELC). See the Operation and Maintenance Manual,