23 TROUBLESHOOTING TROUBLESHOOTING ENGLISH If the engine does not function properly, use the following chart to identify and correct the cause. B When it is difficult to start the engine B When output is insufficient A If the cause of trouble can not be found, contact your KUBOTA dealer. Cause Countermeasures Fuel is thick and doesn't flow. * Check the fuel tank and fuel filter. * Remove water, dirt and other impurities. * As all fuel will be filtered by the filter, if there should be water or other foreign matters on the filter, clean the filter with kerosene. Air or water mixed in fuel system * If air is in the fuel filter or injection lines, the fuel pump will not work properly.
To attain proper fuel injection pressure, check carefully for loosened fuel line coupling, loose cap nut, etc. * Loosen joint bolt stop fuel filter and air vent screws of fuel injection pump to eliminate all the air in the fuel system. Thick carbon deposits on orifice of injection nozzle. * This is caused when water or dirt is mixed in the fuel. Clean the nozzle injection piece, being careful not to damage the orifice. * Check to see if nozzle is working properly or not. If not, install a new nozzle. Engine oil becomes thick in cold weather and engine cranks slow. * Change grade of oil according to the weather (temperature.) Battery is discharged and the engine will not crank.
* Charge battery. * In winter, always remove battery from machine, charge fully and keep indoors. Install in machine at time of use. Cause Countermeasures Carbon stuck around orifice of nozzle piece * Clean orifice and needle valve, being very careful not to damage the nozzle orifice. * Check nozzle to see if good. If not, replace with new parts. Fuel is insufficient. * Check fuel system. Overheating of moving parts * Check lubricating oil system. * Check to see if lubricating oil filter is working properly. * Filter element deposited with impurities would cause poor lubrication. Change element. Air cleaner is dirty * Clean the element every 100 hours of operation.
Injection pump wear * Do not use poor quality fuel as it will cause wear of the pump. Only use No. 2-D diesel fuel.