BOLT 1989386 - Caterpillar

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 cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure 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 Coolant Additive contains alkali. Avoid contact with skin and eyes.
Start By:
a. Prepare the machine for maintenance. Refer to Operation and Maintenance Manual, "Prepare the Machine for Maintenance".
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Allow the cooling system to cool.
Remove the filler cap lock, and store the lock for reuse.
Raise the safety lever.Note: The filler cap cannot be removed until the safety lever is raised and system pressure is released.
Slowly loosen the filler cap.
Remove the filler cap, and store the cap for reuse.
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Clean the filler cap.
Inspect the filler cap. If defective, discard the filler cap.
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Install the cleaned or new filler cap.
Lower the safety lever.
Install the safety lock.