How to Change Cooling System Coolant (DEAC) for Caterpillar 950F

This instruction show  you guide on how to  change cooling system coolant (DEAC) for Caterpillar 950F.More about Caterpillar repair manuals please refer to:CAT SIS 2021

 

Pressurized system:

Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.

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.

Note: This procedure pertains to Caterpillar Diesel Engine Antifreeze/Coolant (DEAC) only. This procedure does not pertain to machines that are shipped from the factory with Extended Life Coolant (ELC) or to machines that are maintained with Extended Life Coolant (ELC).
CAT SIS 2021 Free Download

Drain the coolant whenever the coolant is dirty or whenever the coolant is foaming.
1. Stop the engine and allow the engine to cool.
2. Slowly loosen the cooling system pressure cap in order to relieve system pressure.
3. Remove the drain plug on the bottom left side of the radiator. Allow the coolant to drain from the cooling system into a suitable container. Install the drain plug.
4. Replace the water temperature regulator

Reference: Refer to Operation and Maintenance Manual, “Cooling System Water Temperature Regulator - Replace” for the correct procedure.
5. Fill the cooling system with a solution which consists of clean water and cooling system cleaner. The concentration of the cooling system cleaner in the solution should be between 6 percent and 10 percent.
6. Start the engine. Run the engine for 90 minutes.
7. Stop the engine. Drain the cleaning solution into a suitable container for disposal.
8. While the engine is stopped, flush the cooling system with water. Flush the system until the draining water is clear. Install the drain plug.
9. Add the coolant solution.Refer to Operation and Maintenance Manual,
“Capacities (Refill)” for the capacity of the cooling system.
Note: If you are using Caterpillar antifreeze, do not add the liquid supplemental coolant additive at this time.
10. Start the engine. Run the engine without the cooling system pressure cap until the water temperature regulator opens and the coolant level stabilizes.
11. Clean the cooling system pressure cap and install the cooling system pressure cap.
12. Stop the engine. Close the engine hood. 

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