16. TROUBLESHOOTING 16.4 OTHER TROUBLE ( ): 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.
16.4.1 ELECTRICAL SYSTEM 2-87 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 lamp 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 (‡ Check, repair) ‡ Charge Pinion of starting motor keeps going in and out ‡ Insufficient battery charge ‡ Charge 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 Preheating monitor lamp does not light up (When the temperature of the engine cooling water exceeds 20°C, this condition is normal) ‡ Defective wiring ‡ Defective timer ‡ Defective monitor lamp ‡ Disconnection in glow plug (‡ Check, repair) (‡ Replace) (‡ Replace) (‡ Replace) Air conditioner operation is defective ‡ Blown fuse ‡ Low battery charge ‡ Defective air conditioner switch ‡ Defective blower switch ‡ Defective compressor (‡ Check, repair) ‡ Charge (‡ Replace air conditioner switch) (‡ Replace blower switch) (‡ Replace) Blade does not pitch when pitch operation is carried out (dual tilt specification machine only) ‡ Defective wiring ‡ Defective switch ‡ Defective solenoid valve (‡ Check, repair) (‡ Replace) (‡ Replace)