16. TRO UBLESHOOTING 16.7.3 ENGINE ( ): 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.
PC130/150LGP-6K ENG 2-105 Problem Main causes Remedy Engine oil pressure monitor lights up • Engine oil pan oil level is low (sucking in air) • Clogged oil filter cartridge • Defective tightening of oil pipe joint, oil leakage from dam- aged part • Defective engine oil pressure sensor • Add oil to specified level, see CHECK BEFORE STARTING • Replace cartridge, see EVERY 250 HOURS SERVICE (• Check, repair) (• Replace sensor) Steam is emitted from top part of radiator (pressure valve) • Cooling water level low, water leakage • Loosen fan belt • Dirt or scale accumulated in cooling system • Clogged radiator fin or dam- aged fin • Defectie thermostat • Loose radiator filler cap (high altitude operation • Defective water level sensor • Add cooling water, repair, see CHECK BEFORE STARTING • Adjust fan belt tension, see EVERY 1000 HOURS SERV- ICE • Change cooling water, clean inside of cooling system, see WHEN REQUIRED • Clean or repair.
see EVERY 500 HOURS SERVICE (• Replace thermostat) • Tighten cap or replace packing (• Replace sensor) Radiator water level monitor lights up Engine does not start when start- ing motor is turned • Lack of fuel • Air in fuel system • Defective fuel injection pump or nozzle • Starting motor cranks engine sluggishly • Preheating monitor does not light up • Defective compression ° Defective valve clearance • Add fuel, see CHECK BE- FORE STARTING • Repair place where air is sucked in, see EVERY 500 HOURS SERVICE (• Replace pump or nozzle) See ELECTRICAL SYSTEM (° Adjust valve clearance)