. OPERATION TROUBLESHOOTING 3 - 139 ENGINE ( ): Always contact your Komatsu distributor when dealing with these it ems. In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs. Problem Main causes Remedy Engine oil pressure cuation lamp lights up Add oil to specified level. See CHECK BEFORE STARTING Replace cartridge, see EVERY 500 HOURS SERVICE ( Check, repair) ( Repair, connect wiring) Steam spurts out from top of radiator (pressure valve) Check, add cooling water. See CHECK BEFORE STARTING Replace belt. See EVERY 500 HOURS SERVICE Change coolant, clean inside of cooling system. See WHEN REQUIRED Clean or repair.
See EVERY 500 HOURS SERVICE ( Replace water temperature gauge) ( Replace thermostat) ( Replace thermostat seal) Tighten or replace cap ( Repair, connect wiring) Maintenance caution lamp lights up, and character display shows "E01" and drop in coolant level. Indicator of engine coolant temperature gauge is in red range Engine coolant temperature caution lamp lights up Indicator of engine coolant temperature gauge stays at lowest position and does not rise ( Replace engine coolant temperature gauge) ( Replace thermostat) ( Install radiator curtain) Engine does not start even when starting motor is turned Add fuel.
See CHECK BEFORE STARTING ( Repair place where air is leaking in) Fill filter with fuel. See EVERY 500 HOURS SERVICE See electrical components See electrical components ( Adjust valve clearance) Set gear shift lever to N (neutral) position Fuel supply occasionally stops Clogged fuel tank breather tube ( Replace breather tube)