CONTROL GP-GOVERNOR 2458512 - Caterpillar

Do not change the coolant until you read and understand the cooling system information in Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations".Failure to do so could result in damage to the cooling system components.
Mixing ELC with other products reduces the effectiveness of the coolant and shortens coolant life. Use only Caterpillar products or commercial products that have passed the Caterpillar EC-1 specifications for premixed or concentrate coolants. Use only Caterpillar Extender with Caterpillar ELC. Failure to follow these recommendations could result in the damage to cooling systems components.If ELC cooling system contamination occurs see the topic Extended Life Coolant (ELC) in the Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations".
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.
If the coolant in the machine is changed to Extended Life Coolant (ELC) from another type of coolant, refer to Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Cat Extended Life Coolant (ELC)".If the coolant is dirty or if you observe any foaming in the cooling system, drain the coolant before the recommended interval.Procedure for the Tractor
Park the machine on a level surface and engage the parking brake. Stop the engine. Allow the engine to cool.
Clean the area around the cooling system pressure cap of any dirt or debris. This must be done before the cooling system pressure cap can be removed.
Slowly remove the cooling system pressure cap in order to release pressure.
Illustration 1 g03427890
The coolant drain valve is located behind guard (1).
Open the coolant drain valve. Drain the coolant into a suitable container.
Flush the cooling system. Follow step 6.a through step 6.h in order to flush the cooling system.
Close the drain valve.
Fill the cooling system with clean water.
Install the pressure cap.
Do not run the engine with plain water in the cooling system for more than 5 min. The water may vaporize and trapped air may damage the NRS cooler.
Start the engine and run the engine until the engine reaches operating temperature.
Stop the engine and allow the engine to cool.
Loosen the pressure cap slowly in order to relieve any pressure in the cooling system.
Open the drain valve that is on the bottom of the radiator and allow the coolant to drain into a suitable container.
Flush the radiator with clean water until the draining water is transparent.
Close the coolant drain valve. Install the access cover.
Add ELC. Refer to the following topics:
Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Cooling System Specifications"
Operation and Maintenance Manual, "Capacities (Refill)"
After the cooling system has been filled, perform the following procedures during initial start-up:
Start the engine without the filler cap.
Run the engine at low idle for 10 minutes.
Then, increase the engine speed to a high idle until the water