D: METER GROUP * Confirm that gauges (I), (2) and monitor lamp (3) will light, when the starting switch is turned to ON before the engine is started. If any gauge or monitor lamp does not light, ask your Komatsu distributor to inspect that monitor lamp or gauge. 1. ENGINE COOLING WATER TEMPERATURE GAUGE This gauge indicates the temperature of the cooling water. If the tempera- ture is normal during operation, the green range will light. If the red range lights up during operation, the engine overheat prevention system is actu- ated. * The engine overheat prevention system acts as follows. Red range (1) lights up: The power mode is switched to L mode for each working mode.
Red range (2) lights up: The engine speed is reduced to low idling. * The engine overheat prevention system is actuated until the temperature returns to the green ragne. * If red range (2) lights up, after the engine water temperature is lowered, turn the fuel control dial to low idling (MIN) to cancel the display. (a): White (b): Green (c): Red 2. FUEL GAUGE This gauge indicates the amount of fuel in the fuel tank. If there is enough fuel in the tank while the engine is running, the green range lights. If the red range lights, there is less than 55 liters of fuel in the tank. When the red range lights, add fuel.
* After the starting switch is turned ON, the correct level may not be dis- played for a moment, but this does not indicate any abnormality. (a): Red (b): Green 3. ENGINE PRE-HEATING MONITOR LAMP This shows the preheating time when starting the engine at temperatures below 0°C. It lights up when the starting switch is turned to the HEAT position, and if it is kept in that position, the lamp flashes after approx. 30 seconds to inform that preheating is completed. (After flashing for approx. IO seconds it goes out.) - 12-