PLATE 4Z8890 - Caterpillar

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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Topping off or mixing Cat ELC with other products that do not meet Caterpillar EC-1 specifications reduces the effectiveness of the coolant, shortens coolant service life, and may cause premature wear to components.Use only Caterpillar products or commercial products that have passed the Caterpillar EC-1 specification for pre-mixed or concentrate coolants. Use only Extender with Cat ELC.Failure to follow these recommendations can result in shortened cooling system component life.
Reference: For information about adding Extender to the cooling system, refer to Operation and Maintenance Manual, "Cooling System Coolant Extender (ELC) - Add" or consult your Caterpillar dealer.
Illustration 1 g01300560The cooling system pressure cap is located under the engine hood at the rear of the machine.
Open the engine hood. Slowly loosen cooling system pressure cap in order to relieve any system pressure. Remove the cooling system pressure cap.
Illustration 2 g01310342
Coolant drain valve
The side frame and the tire are not shown for clarity.
The drain valve is located on the bottom of the transmission cooler on the left side of the machine. Open the drain valve. Allow the coolant to drain into a suitable container.
If an Extended Life Coolant (ELC) was previously used, flush the cooling system with clean water and close the drain valve. No other cleaning agents are required. If you change from another type of coolant to an Extended Life Coolant, close the drain valve. Fill the cooling system with a solution that consists of water with a 6 to 10 percent concentration of Caterpillar cleaning agent. Run the engine for 90 minutes. Then, drain the solution. After you drain the solution, thoroughly flush the cooling system with clean water. All of the cleaning agent must be removed from the cooling system.
Replace the water temperature regulator. Reference: Refer to Operation and Maintenance Manual, "Cooling System Water Temperature Regulator - Replace" for the correct procedure.
Add the Extended Life Coolant. Reference: Refer to Operation and Maintenance Manual, "Capacities (Refill)" for the proper amount.
Start the engine. Run the engine without the cooling system pressure cap until the thermostat opens and the coolant level stabilizes.
Stop the engine. Maintain the coolant level in gauge on the coolant overflow reservoir.
Inspect the cooling system pressure cap and the cap seal. Clean the cooling system pressure cap with a clean cloth. If necessary, replace the cooling system pressure cap.
Install the cooling system pressure cap. Close the engine hood.