Failure to follow these safety precau- tions may lead to a serious accident. 8. PRECAUTIONS FOR OPERATION RADIATOR WATER LEVEL If it is necessary to add water to the radiator, stop the engine and allow the engine and radiator to cool down before adding the water. Slowly loosen the caps to relieve pressure before removing the caps. USE OF LIGHTING When checking fuel, oil, coolant, or battery electrolyte, always use lighting with anti-explosion specifica- tions. If such lighting equipment is not used, there is danger of explosion. PC450-ENG 1-23