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OPERATION TROUBLES AND ACTIONS Problem Remedy Speed of travel, swing, boom, arm, bucket is slow Add oil to specified level, see CHECK BEFORE STARTING Pump generates abnormal noise (sucking in air) Clogged element in hydraulic tank strainer, lack of oil Clean, see EVERY 2000 HOURS SERVICE Loose fan belt Adjust fan belt tension, EVERY 1000 HOURS SERVICE Clean, see EVERY 500 HOURS SERVICE Add oil to specified level, see CHECK BEFORE STARTING Excessive rise in hydraulic oil temperature Dirty oil cooler Lack of hydraulic oil Track comes off Adjust track tension, see WHEN REQUIRED Abnormal wear of sprocket Bucket rises slowly, does not rise Add oil to specified level, CHECK BEFORE STARTING Does not swing Swing lock switch still applied Turn swing lock switch OFF 3 - 140 Chassis ( ) :
Always contact your Komatsu distributor when dealing with these items. In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs. Main causes Track too loose