| NOTICE |
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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. |
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. 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 in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
Drain the coolant whenever the coolant is dirty or whenever foaming is observed.
The radiator cap is positioned in the top of the hood.
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| Illustration 1 | g00101147 |
- Slowly loosen the radiator cap in order to relieve system pressure. Remove the radiator cap.
- The drain valve is under the radiator. Open the drain valve. Allow the coolant to drain into a suitable container.
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| Illustration 2 | g00103703 |
- Close the drain valve. Fill the system with a solution which consists of clean water and of cooling system cleaner. The concentration of the cooling system cleaner should be 6 to 10 percent.
- Start the engine. Run the engine for 90 minutes. Stop the engine. Drain the cleaning solution into a suitable container.
- While the engine is stopped, flush the system with water. Flush the system until the draining water is clear.
- Close the drain valve.
- Add the coolant solution. See the following topics:
- Operation and Maintenance Manual, "Cooling System Specifications"
- Operation and Maintenance Manual, "Lubricant Viscosities"
- Operation and Maintenance Manual, "Refill Capacities"
Note: If you are using Caterpillar antifreeze, do not add the supplemental coolant additive at this time. Also, do not change the supplemental coolant additive element at this time.
- Operation and Maintenance Manual, "Cooling System Specifications"
- Start the engine. Run the engine without the radiator cap until the thermostat opens and the coolant level stabilizes.
- Maintain the coolant level within 13 mm (.5 inches) of the bottom of the filler pipe.
- If the gasket is damaged, replace the radiator cap. Install the radiator cap.
- Stop the engine.