16. TROUBLESHOOTING 16.3 OTHER TROUBLE l In cases of abnormalities or causes which are not listed below, distributor for repairs. . ( ): Always contact your Komatsu distributor when dealing with these items.
please contact your Komatsu 16.3.1 ELECTRICAL SYSTEM Problem Main causes Remedy Lamp does not glow brightly even when the engine runs at high speed l Defective wiring (o Check, repair loose terminals, disconnections) l Defective adjustment of fan belt tension l 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 l Defective wiring l Defective alternator (0 Replace) (o Check, repair) Abnormal noise is generated from alternator l Defective alternator (o Replace) Starting motor does not turn when starting switch is turned to ON l Insufficient battery charge l Charge l Defective wiring (o Check, repair) Pinion of starting motor keeps going in and out l Insufficient battery charge l Charge Starting motor turns engine sluggishly l Insufficient battery charge l Charge l Defective starting motor (o Replace) Starting motor disengages before .
Defective wiring l (Check, repair) engine starts l Insufficient battery charge l Charge Heater signal does not glow red l Defective wiring (o Check, repair) l Defective heater signal (o Replace) l Defective heater relay (o Replace) Oil pressure warning lamp does not light up when engine is stopped (starting switch at ON position) l Defective warning lamp l Defective warning lamp switch (o Replace) (o Replace) Charge lamp does not light up when engine is stopped (starting switch at On position) l Defective wiring (o Replace) (o Check, repair) l Defective charge lamp Outside of electrical intake air heater is not warm when touched by hand l Defective wiring (a Check, repair) (o Replace) l Defective operation of heater relay switch l Disconnection in electrical intake air heater (o Check, repair heater relay switch) 2-55