623H Wheel Tractor-Scraper Caterpillar

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Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand. Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns. Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.

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The cooling system pressure cap is located on top of the engine compartment.

1. Clean the area around the cooling system pressure cap of any dirt or debris. This cleaning must be done before the cooling system pressure cap can be removed.

2. Remove the cooling system pressure cap slowly in order to relieve pressure.

3. Inspect the cooling system pressure cap and the cap seal for damage, deposits, and foreign material. Clean the cooling system pressure cap with a clean cloth. Replace the cooling system pressure cap if the cap is damaged.

4. Install the cooling system pressure cap.