16. TROUBLESHOOTING 16.6.2 CHASSIS ( ): 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.
PC450-ENG 2-95 Problem Main causes Remedy • Add oil to specified level, see “CHECK BEFORE STARTING” Speed of travel, swing, boom, arm, bucket is slow • Lack of hydraulic oil Pump generates abnormal noise • Clogged element in hydraulic tank strainer • Clean, see “EVERY 2000 HOURS SERVICE” Excessive rise in hydraulic oil temperature • Loose fan belt • Dirty oil cooler • Lack of hydraulic oil • Adjust fan belt tension, see “EVERY 250 HOURS SERVICE” • 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 Bucket rises slowly, does not rise • Lack of hydraulic oil • Add oil to specified level, see “CHECK BEFORE STARTING”