11. EXPLANATION OF COMPONENTS Operating check for machine monitor system When the starting switch is turned to the ON position before the engine is started, all the monitors, gauges, and the central warning lamp will light up for approx. 3 seconds, and the alarm buzzer will sound for approx. one second. When this happens, the speedometer will display 88. If no monitor light up, there is probably a failure or disconnection in that circuit, so please contact your Komatsu distributor to have the circuit checked.
When the starting switch is at the ON position, if there is not at the neutral position, transmission shift lever position pilot lamp 1 and the central warning lamp will flash and the alarm buzzer will continue to sound intermittently. At this time, when the lever is placed at neutral, letter “N” is displayed, the central warning lamp goes out and the buzzer stops. Checking for blown caution lamp or pilot lamp bulbs Turn the starting switch to the ON position before starting the engine, press bulb check switch 2 and check that no caution lamp or pilot lamp bulbs are blown. If any lamp does not light up, the bulb is probably blown, so replace the bulb.
If the lamp does not light up even when the bulb is replaced, there is probably a failure or disconnect, so please contact your Komatsu distributor to have the circuit checked. 2-6