TROUBLES AND ACTIONS 3.7.6 OTHER TROUBLE 3.7.6.1 ELECTRICAL SYSTEM ( ): Always contact your Komatsu Dealer when dealing with these items. In cases of abnormalities or causes which are not listed below, contact your Komatsu Dealer for repairs.
151 Problem Main causes Remedy Lamp dose not glow brightly even when the engine runs at high speed • Defective wiring • Defective adjustment of fan belt ten- sion • Blown fuse (•) Check, repair loose terminals, disconnections • Adjust fan belt tension For details, see EVERY 500 HOURS SERVICE • Replace Lamp flickers while engine is running Charge level monitor dose 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 dose not turn when starting switch is turned to ON • Defective wiring • Insufficient battery charge • Blown fuse (•) Check, repair • Charge • Replace Starting motor pinion repeatedly moves in and out (makes rattling sound) • 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 Pre-heating monitor dose not lights • Defective wiring • Defective monitor (•) Check, repair (•) Replace Oil pressure monitor dose not light up when engine is stopped (starting switch at ON position) • Defective monitor • Defective oil pressure switch (•) Replace (•) Replace