SCREEN 4258620 - 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.
Replace the water temperature regulator regularly to reduce the chance of unscheduled downtime and of problems with the cooling system.The water temperature regulator should be replaced after the cooling system has been cleaned. Replace the water temperature regulator when the cooling system is drained. Replace the water temperature regulator when the cooling system coolant is drained to a level below the water temperature regulator housing.Note: If you are only replacing the water temperature regulator, drain the cooling system coolant to a level that is below the water temperature regulator housing.
Failure to replace the engine's water temperature regulator on a regularly scheduled basis could cause severe engine damage.
Illustration 1 g06012788
Loosen hose clamp (1) and remove the hose from water temperature regulator housing (3).
Remove bolts (2) from the housing for the water temperature regulator. Remove water temperature regulator housing (3).
Remove the gasket.
Caterpillar engines incorporate a shunt design cooling system and require operating the engine with a thermostat installed.If the thermostat is installed wrong, it will cause the engine to overheat. Inspect gaskets before assembly and replace if worn or damaged.
Install a new water temperature regulator and a new gasket.
Install the hose. Tighten the hose clamp.
Add the cooling system coolant. Check the coolant level.
Inspect pressure cap and the gasket for damage. Replace the pressure cap if the pressure cap or the gasket are damaged.
Install the pressure cap.
Close all access doors and lock the access doors.