16. TROUBLESHOOTING 16.6 OTHER TROUBLE 16.6.1 ELECTRICAL SYSTEM ( ): Always contact your Komatsu distributor when dealing with these items. In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs.
2-104 Problem Main causes Remedy Lamp does not glow brightly even when the engine runs at high speed ‡ Defective wiring ‡ Defective adjustment of fan belt tension (‡ Check, repair loose terminals, disconnections) ‡ Adjust fan belt tension For details, see EVERY 250 HOURS SERVICE Lamp flickers while engine is running Charge level monitor does not go out even when engine is running ‡ Defective alternator ‡ Defective wiring (‡ Replace) (‡ Check, repair) Abnormal noise is generated from alternator ‡ Defective alternator (‡ Replace) Starting motor does not turn when starting switch is turned to ON ‡ Defective wiring ‡ Insufficient battery charge ‡ Defective starting motor (‡ Check, repair) ‡ Charge (‡ Replace) Pinion of starting motor keeps going in and out ‡ Insufficient battery charge ‡ Defective safety relay ‡ Charge (‡ Replace) Starting motor turns engine sluggishly ‡ Insufficient battery charge ‡ Defective starting motor ‡ Charge (‡ Replace) Starting motor disengages before engine starts ‡ Defective wiring ‡ Insufficient battery charge (‡ Check, repair) ‡ Charge Pre-heating monitor does not light ‡ Defective wiring ‡ Defective heater relay ‡ Defective monitor (‡ Check, repair) (‡ Replace) (‡ Replace) Oil pressure monitor does not light up when engine is stopped (starting switch at ON position) ‡ Defective monitor ‡ Defective caution lamp switch (‡ Replace) (‡ Replace) Outside of electrical heater is not warm when touched by hand ‡ Defective wiring ‡ Disconnection in electric heater ‡ Defective operation of heater relay switch (‡ Check, repair) (‡ Replace) (‡ Replace)