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 red range (1) lights up during operation, the engine overheat prevention system is actu- ated.
If red range (2) lights up during operation, the alarm buzzer sounds, the engine water temperature monitor flashes, and the overheat prevention sys- tem is actuated. * 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 and the caution monitor lamp flashes. Red range (2) lights up: The engine speed is reduced to low idling, the caution monitor lamp flashes and the alarm buzzer sounds. * 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 35 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 monitor lamp indicates the pre-heating time required when starting the engine at an ambient temperature below 0°C. The monitor lamp lights when the starting switch is turned to HEAT posi- tion and flashes after about 30 seconds to show that the pre-heating is completed. (The monitor lamp will go off after about 10 seconds.) - 12-