TRANSMISSION 7S7000 - 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, "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.
Topping off or mixing Cat ELC with other products that do not meet Caterpillar EC-1 specifications reduces the effectiveness of the coolant and shortens coolant service life.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 the addition of Extender to your cooling system, see Operation and Maintenance Manual, "Cooling System Coolant Extender (ELC) - Add" or consult your Caterpillar dealer.If an Extended Life Coolant was previously used, flush the cooling system with clean water. No other cleaning agents are required. Use the following procedure to change the Extended Life Coolant.
Illustration 1 g00981214
The cooling system pressure cap is located under the hood at the rear of the machine.
Illustration 2 g00987548
Slowly loosen cooling system pressure cap (1) in order to relieve system pressure.
Illustration 3 g00987549
Open drain valve (2) on the bottom of the radiator. Drain valve (2) can be accessed from the left side of the machine. Allow the coolant to drain into a suitable container.
Flush the cooling system with clean water until the draining water is clean. Close drain valve (2) .
Replace the water temperature regulator at this time.Reference: Refer to Operation and Maintenance Manual, "Cooling System Water Temperature Regulator - Replace".Reference: Refer to Disassembly and Assembly, SENR3611, "3126 Engines for Caterpillar Built Machines".
Add the Extended Life Coolant.Reference: Refer to Operation and Maintenance Manual, "Capacities (Refill)" for the refill capacity of the cooling system.
Start the engine. Run the engine without the cooling system pressure cap until the water temperature regulator opens and the coolant level stabilizes.
Illustration 4 g00987559
Maintain the coolant level in sight gauge (3) on the upper right side of the radiator.
Install pressure cap (1). Stop the engine.