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Make sure you read and understand the information in the topics Safety and Cooling System Specifications for all information pertaining to water, antifreeze and supplemental coolant additive requirements before you proceed with maintenance of the cooling system. |
Flushing the ELC from the Cooling System
Some engines utilize Extended Life Coolant (ELC). See the Operation and Maintenance Manual, "Maintenance Interval Schedule" for the proper service interval. If an ELC was previously used, flush the cooling system with clean water. No other cleaning agents are required.
Flushing a Standard Coolant from the Cooling System
If you change to an ELC from another type of coolant, use a Caterpillar cleaning agent to flush the cooling system. After you drain the cooling system, thoroughly flush the cooling system with clean water. All of the cleaning agent must be removed from the cooling system.
- Open the radiator access cover in the bottom guard under the engine.
- Loosen the radiator cap slowly in order to release pressure. Remove the radiator cap.
- Open the drain valve and allow the coolant to drain into a suitable container. The drain valve is under the radiator.
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NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
- Flush the cooling system with clean water until the draining water is clean.
- Close the drain valve.
- Add the Extended Life Coolant. See Operation and Maintenance Manual, "Refill Capacities".
- Start the engine. Operate the engine without the radiator cap until the thermostat opens and the coolant level stabilizes.
- Check the coolant reservoir. Maintain the coolant level above the middle of the sight glass.
- Install the radiator cap.
- Stop the engine.
- Close the radiator access cover.