HOSE AS 3944612 - Caterpillar

At operating temperature, the engine coolant is hot and under pressure.Steam can cause personal injury.Check the coolant level only after the engine has been stopped and the fill cap is cool enough to touch with your bare hand.Remove the fill cap slowly to relieve pressure.Cooling system conditioner contains alkali. Avoid contact with the skin and eyes to prevent personal injury.
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.
Stop the engine. Allow the cooling system to completely cool.
Open the engine compartment.
Carefully loosen the cooling system pressure cap in order to relieve system pressure.
Open the radiator drain valve. Allow some coolant to drain into a suitable container before the sample is taken. Excessive sediment can drain away, and a more accurate sample results. Obtain a sample in an appropriate container. Close the radiator drain valve.
Send the coolant sample to an appropriate lab for analysis. See the Operation and Maintenance Manual, "S O S Coolant Analysis" section.
Refill the cooling system with coolant, as required. See Operation and Maintenance Manual, "Cooling System Specifications".
Tighten the cooling system pressure cap.
Close the engine compartment.