TROUBLES AND ACTIONS OPERATION Chassis 3 q ( ): Always contact your Komatsu distributor when dealing with these items. q In cases of abnormalities or causes which are not listed below, contact your Komatsu distributor for repairs.
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 (sucking in air) •Clogged element in hydraulic tank strainer, lack of oil •Clean, see EVERY 2000 HOURS SERVICE •Check fan belt tension, replace •Clean, see EVERY 500 HOURS SERVICE •Add oil to specified level, see CHECK BEFORE STARTING Track comes off •Track too loose •Adjust track tension, see WHEN REQUIRED Abnormal wear of sprocket •Loose fan belt •Dirty oil cooler Excessive rise in hydraulic oil tem- perature •Lack of hydraulic oil Bucket rises slowly, does not rise •Lack of hydraulic oil •Add oil to specified level, CHECK BEFORE STARTING Does not swing •Swing lock switch still applied •Turn swing lock switch OFF 3-130