OPERATION TROUBLES AND ACTIONS OTHER TROUBLE 0. Electrical System 0. ( ): 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. Chassis 0. In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs.
3-103 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 250 HOURS SERVIC • 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) Problem Main causes Remedy Speed of travel, swing, boom, arm, bucket is slow • Lack of hydraulic oil • Add oil to specified level, see CHECK BEFORE STARTING Pump generates abnormal noise • Clogged element in hydraulic tank strainer • Clean, see EVERY 2000 HOURS SERVICE Excessive rise in hydraulic oil temper- ature • Lack of hydraulic oil • Loose fan belt • Add oil to specified level, see CHECK BEFORE STARTING • Adjust fan belt tension, EVERY 250 HOURS SERVICE Track comes off • Track too loose • Adjust track tension, see WHEN REQUIRED Abnormal wear of sprocket