. OPERATION TROUBLESHOOTING OTHER TROUBLE 3 - 172 ELECTRICAL SYSTEM ( ) : Always contact your Komatsu distributor when dealing with these items. In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs.
Problem Main causes Remedy Lamp does not glow brightly even when the engine runs at high speed Lamp flickers while engine is running ( Check, repair loose terminals, disconnections) Adjust alternator belt tension For details, see EVERY 250 HOURS SERVICE Even when the engine is rotating, the battery charge circuit caution lamp does not go out ( Replace) ( Check, repair) Adjust alternator belt tension For details, see EVERY 250 HOURS SERVICE Abnormal noise is generated from alternator Defective alternator ( Replace) Starting motor does not turn when starting switch is turned to ON ( Check, repair) Charge Pinion of starting motor keeps going in and out Charge Starting motor turns engine sluggishly Charge ( Replace) Starting motor disengages before engine starts ( Check, repair) Charge Preheating pilot lamp does not light up ( Check, repair) ( Replace) ( Replace) Even when engine is stopped, battery charge circuit caution lamp does not light up (starting switch at ON position) ( Check, repair) ( Replace)