TROUBLES AND ACTIONS 3.7.6.2 CHASSIS ( ): 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. 3.7.6.3 ENGINE ( ): 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.
152 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 temperature • Lack of hydraulic oil • Loose fan belt • Clogged radiator fins, oil cooler fins • Add oil to specified level, see CHECK BEFORE STARTING • Adjust fan belt tension, EVERY 500 HOURS SERVICE • Clean or repair.
For details, see EVERY 500 HOURS SERVICE Track comes off • Track too loose • Adjust track tension, see WHEN REQUIRED Abnormal wear of sprocket Problem Main causes Remedy Engine oil pressure monitor flashes (buzzer sounds at same time) • Engine oil pan oil level is low (sucking in air) • Clogged oil filter cartridge • Defective tightening of oil pipe joint, oil leakage from damaged part • Defective engine oil pressure sensor • Add oil specified level, see CHECK BEFORE STARTING • Replace cartridge, see EVERY 500 HOURS SERVICE (•) Check, repair (•) Replace sensor Steam is emitted from top part of re- diator (pressure valve) • Cooling waterlevel low, water leaka- ge • Loosen fan belt • Dirt or scale accumulated in cooling system • Clogging radiator fin or damaged fin • Defective thermostat • Loosen radiator filler cap (high altitude operation) • Defective water level sensor • Add cooling water,repair, see CHECK BEFORE STARTING • Adjust fan belt tension, see EVERY 500 HOURS SERVICE • Change cooling water, clean inside of cooling system, see WHEN REQUIRED • Clean or repair,see EVERY 500 HOURS SERVICE (•) Replace themostat • Tighten cap or replacem packing (•) Replace sensor Engine water temperature gauge indi- cator is in red range (at same time, pilot lamp flashes and buzzer sounds) Even when engine is run for a long ti- me, engine water temperature gauge indicator does not enter correct range • Defective thermostat • Monitor defective (•) Replace thermostat (•) Replace monitor)