COUPLING GP-FLEXIBLE 4733909 - Caterpillar

Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Note: The Diesel Exhaust Fluid (DEF) tank requires coolant flow around the tank. The Coolant Diverter Valve (CDV) will turn the flow on or off. If the coolant system has been filled with the CDV in the closed position, coolant level will drop because of the opening of the CDV.Engine with Radiator Installed by the Engine Manufacturer
When any servicing or repair of the engine cooling system is performed, the procedure must be performed with the engine on level ground. Level ground will allow you to check accurately the coolant level. This checking will also help in avoiding the risk of introducing an air lock into the coolant system.
Check the coolant level when the engine is stopped and cool.
Loosen filler cap slowly in order to relieve any pressure. Remove the filler cap.
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Maintain the coolant level 25 mm (1 inch) below the filler neck (1).
Check the pressure cap for damage, replace if necessary. Install the pressure cap. Inspect the cooling system for leaks. Engine with Radiator Installed by OEM
Note: The cooling system may not have been provided by Carerpillar. The procedure that follows is for typical cooling systems. Refer to the OEM information for the correct procedures.Check the coolant level when the engine is stopped and cool.
When any servicing or repair of the engine cooling system is performed, the procedure must be performed with the engine on level ground. Level ground will allow you to check accurately the coolant level. This checking will also help in avoiding the risk of introducing an air lock into the coolant system.
Loosen filler cap slowly in order to relieve any pressure. Remove the filler cap.
Maintain the coolant level at the maximum mark that is correct for your application. If the engine is equipped with a sight glass, maintain the coolant level to the correct level in the sight glass.
Check the pressure cap for damage, replace if necessary. Install the pressure cap. Inspect the cooling system for leaks.