11. EXPLANATION OF COMPONENTS 5. LOW PPC PRESSURE This warns that pilot control pressure is low if the monitor lamp flashes. Check for leaks in pilot lines. If none are found & warning persists consult your Komatsu distribu- tor. 11.1.3 C: EMERGENCY STOP ITEMS CAUTION If any monitor lamp flashes, stop the engine or run it at low idling, and take the following action. 1. ENGINE WATER TEMPERATURE If the temperature of the engine cooling water becomes abnormally high, the monitor lamp flashes, and the overheat prevention system is automatically actuated to reduce the engine speed. Stop operations and run the engine at low idling until the engine wa- ter temperature gauge enters the green range.
2. RADIATOR WATER LEVEL If the radiator water level drops, the monitor lamp flashes. Stop the engine, check the radiator water level, and add water if necessary. 3. ENGINE OIL PRESSURE If the engine oil pressure drops below the normal pressure, the moni- tor lamp flashes. At this item, stop the engine and inspect it according to 16.6 “OTHER TROUBLE.” REMARK While the starting switch is ON, the lamp remains lit and goes off once the engine is started. When the engine starts, the buzzer may sound for a short time, however, this does not indicate a fault. PC450-ENG 2-8