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Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand. Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns. Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes. |
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Do not change the coolant until you read and understand the material found in the Operation and Maintenance Manual, "Cooling System Specifications" section. Failure to do so could result in damage to the cooling systems components. |
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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. |
If the Diesel Engine Antifreeze/Coolant (DEAC) is dirty or if you observe any foaming in the cooling system, drain the coolant before the recommended interval.
Park the machine on a level surface. Ensure that the parking brake is fully engaged. Lower the dump body.
- Stop the engine and allow the engine to cool.
- Remove the radiator grill. The grill is secured to the hood with four bolts and washers. Raise the hood.
- Slowly remove the cooling system pressure cap in order to relieve pressure.
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| Illustration 1 | g00606333 |
- Open the drain valve. The drain valve is located at the base of the radiator. Allow the coolant to drain into a suitable container.
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| Illustration 2 | g00606334 |
- Close the drain valve. Fill the cooling system with clean water and with a 6 to 10% concentration of cooling system cleaner.
- Start the engine. Run the engine for 90 minutes.
- Stop the engine. Open the drain valve and drain the cleaning solution into a suitable container.
- Flush the cooling system with water until the draining water is transparent.
- Close the drain valve.
- Add the coolant solution. Refer to Operation and Maintenance Manual, "Refill Capacities".
Note: Make sure that the cooling system pressure cap remains off during Step 11 and Step 12.
- Start the engine and run the engine. Leave the pressure cap off until the water temperature regulator opens and until the coolant level stabilizes.
- Maintain the coolant level at approximately 13 mm (0.5 inch) from the bottom of the filler pipe.
- Inspect the gasket of the cooling system pressure cap for damage. If the gasket is damaged, replace the gasket.
- Install the cooling system pressure cap.
- Stop the engine.
- Lower the hood. Install the radiator grill. Secure the radiator grill with four bolts and four washers.