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HEAD 3904738 - Caterpillar

3904738 HEAD Caterpillar parts HEAD
Alternative (cross code) number:
Caterpillar 3904738 HEAD
Weight: 20 pounds 9 kg.

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Illustration 1 g00285520
Cooling system filler cap
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.
Remove the cooling system filler cap slowly in order to relieve pressure.
Maintain the coolant level within 13 mm (0.5 inch) of the bottom of the filler pipe. If the engine is equipped with a sight glass, maintain the coolant level to the proper level in the sight glass.
Illustration 2 g00103639
Typical filler cap gaskets
Clean the cooling system filler cap and check the condition of the filler cap gaskets. Replace the cooling system filler cap if the filler cap gaskets are damaged. Reinstall the cooling system filler cap.
Inspect the cooling system for leaks.

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