77 TROUBLESHOOTING TROUBLESHOOTING ENGINE TROUBLESHOOTING If something is wrong with the engine, refer to the table below for the cause and its corrective countermeasure. If you have any questions, contact your local KUBOTA Dealer. Trouble Cause Countermeasure Engine is difficult to start or won't start. A No fuel flow. A Check the fuel tank and the fuel filter. Replace filter if necessary. A Air or water is in the fuel system. A Check to see if the fuel line coupler bolt and nut are tight. A Bleed the fuel system. (See "Bleeding Fuel System" in "SERVICE AS REQUIRED" in "PERIODIC SERVICE" section.) A In winter, oil viscosity increases, and engine revolution is slow.
A Use oils of different viscosities, depending on ambient temperatures. A Battery becomes weak and the engine does not turn over quick enough. A Clean battery cables and terminals. A Charge the battery. A In cold weather, always remove the battery from the engine, charge and store it indoors. Install it on the vehicle only when the vehicle is going to be used. Insufficient engine power. A Insufficient or dirty fuel. A The air cleaner is clogged. A Check the fuel system. A Clean or replace the element. Engine stops suddenly. A Insufficient fuel. A Refuel. A Bleed the fuel system if necessary. Exhaust fumes are colored. Black A Fuel quality is poor. A Too much oil.
A The air cleaner is clogged. A Change the fuel and fuel filter. A Check the proper amount of oil. A Clean or replace the element. Blue white A The inside of exhaust muffler is dumped with fuel. A Injection nozzle trouble. A Fuel quality is poor. A Heat the muffler by applying load to the engine. A Check the injection nozzle. A Change the fuel and fuel filter. Engine overheats A Engine overloaded. A Shift to lower gear or reduce load. A Low coolant level. A Fill cooling system to the correct level; check radiator and hoses for loose connections or leaks. A The motor driven fan does not turn. A Check to see if the fuse is not blown. A Check the electric system.
A Dirty radiator core or grille screens. A Remove all trash. A Coolant flow route corroded. A Flush cooling system.