TROUBLESHOOTING 24 ENGLISH B When engine suddenly stops B When engine overheats A When the engine has suddenly stopped, turn the engine lightly by pulling on the fan belt. If the engine turns easily without abnormalities, the cause of the trouble is usually lack of fuel or bad nozzle. B When color of exhaust is especially bad B When engine must be stopped immediately Cause Countermeasures Lack of fuel * Check the fuel tank and refill the fuel, if necessary. * Also check the fuel system for air or leaks. Bad nozzle * If necessary, replace with a new nozzle. Moving parts are overheated due to shortage of lubrication oil or improper lubrication.
* Check amount of engine oil with oil level gauge. * Check lubricating oil system. * At every 2 times of oil change, oil filter cartridge should be replaced. Cause Countermeasures Engine oil insufficient * Check oil level. Replenish oil as required. Fan belt broken or elongated * Change belt or adjust belt tension. Coolant insufficient * Replenish coolant. Excessive concentration of antifreeze * Add water only or change to coolant with the specified mixing ratio. Radiator net or radiator fin clogged with dust * Clean net or fin carefully. Inside of radiator or coolant flow route corroded * Clean or replace radiator and parts.
Fan or radiator or radiator cap defective * Replace defective parts. Thermostat defective * Check thermostat and replace if necessary. Temperature gauge or sensor defective * Check temperature with thermometer and replace if necessary. Overload running * Reduce load. Head gasket defective or water leakage * Replace parts. Unsuitable fuel used * Use the specified fuel. Cause Countermeasures Fuel is of extremely poor quality. * Select good quality fuel. Use No. 2-D diesel fuel only. Nozzle is bad. * If necessary, replace with new nozzle. Cause Countermeasures Color of exhaust suddenly turns dark. * Check the fuel injection system, especially the fuel injection nozzle.
Bearing parts are overheated. * Check the lubricating system. Oil lamp lights up during operation. * Check the lubricating system. * Check the function of the relieve valve in the lubricating system. * Check pressure switch. * Check filter base gasket.