Drain the Cooling System
- Stop the engine and allow the engine to cool. Close the water inlet for the separate circuit aftercooler. Ensure that the engine will not start when the cooling system is drained.
- Loosen the radiator filler cap slowly in order to relieve any pressure. Remove the radiator filler cap.
- Open the coolant drain. Remove the cooling system drain plugs. Allow the coolant to drain.
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| Illustration 1 | g00728444 |
The cooling system drain is located behind the rear doors. (1) Coolant drain | |
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| Illustration 2 | g00739027 |
Location of the cooling system drain plugs (2) Engine oil cooler (3) Jacket water pump (4) Cylinder block | |
Note: If the engine has a jacket water heater, drain the coolant from the heater.
| NOTICE |
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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 U.S.A.: (309) 675-6277Inside U.S.A.: 1-800-542-TOOLInside Illinois: 1-800-541-TOOLCanada: 1-800-523-TOOLCSTG COSA Geneva, Switzerland: 41-22-849 40 56Clean 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 coolant system drain. Clean the cooling system drain plugs and install the cooling system drain plugs.
- Open the water inlet for the separate circuit aftercooler (if equipped). Fill the cooling system with clean water. Install the radiator filler cap. Operate the engine until the temperature reaches 66 °C (150 °F).
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Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks. |
- Stop the engine and allow the engine to cool. Close the water inlet for the separate circuit aftercooler (if equipped). Ensure that the engine will not start when the cooling system is drained. Loosen the radiator filler cap slowly in order to relieve any pressure. Remove the radiator filler cap.
- Open the cooling system drain. Remove the cooling system drain plugs. Allow the coolant to drain. Flush the cooling system with clean water. Close the cooling system drain. Install the cooling system drain plugs.
- Repeat Steps 3, 4, and 5.
Fill the Cooling System
Note: For information about the proper coolant to use, see this Operation and Maintenance Manual, "Coolant Recommendations" (Maintenance Section). For the capacity of the cooling system, see this Operation and Maintenance Manual, "Refill Capacities" (Maintenance Section).
| NOTICE |
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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). After filling the cooling system, do not install the radiator filler cap.
- Open the water inlet for the separate circuit aftercooler (if equipped). Start the engine. Operate the engine in order to purge the air from the cavities of the engine block. Allow the ELC to warm and allow the coolant level to stabilize. Stop the engine.
- Check the coolant level. Maintain the coolant to the proper level on the sight gauge (if equipped). If a sight gauge is not equipped, maintain the coolant within 13 mm (.5 inch) below the bottom of the filler pipe.
- Clean the radiator filler cap. Inspect the gaskets of the radiator cap. If the gaskets of the radiator filler cap are damaged, discard the old radiator filler cap and install a new radiator filler cap. If the gaskets of the radiator filler cap are not damaged, use a 9S-8140 Pressurizing Pump in order to pressure test the radiator filler cap. The correct pressure is stamped on the face of the radiator filler cap. If the radiator filler cap does not maintain the correct pressure, install a new radiator filler cap.
- Start the engine. Inspect the cooling system for leaks and for proper operating temperature.