Kubota Z482-E3 Operator's Manual page 51

40 TROUBLESHOOTING
When engine suddenly stops
Cause
* Check the fuel tank and refill the fuel,
if necessary.
Lack of fuel
* Also check the fuel system for air or
leaks.
* If necessary, replace with a new
Bad nozzle
nozzle.
* Check amount of engine oil with oil
Moving parts are
level gauge.
overheated due to
* Check lubricating oil system.
shortage of
* At every 2 times of oil change, oil filter
lubrication oil or
cartridge should be replaced.
improper
* Check to see if the engine bearing
lubrication.
clearances is within factory specs.
When color of exhaust is especially bad
Cause
Fuel governing
* Contact dealer for repairs.
device bad
Fuel is of
* Select good quality fuel.
extremely poor
Use No. 2-D diesel fuel only.
quality.
* If necessary, replace with new
Nozzle is bad.
nozzle.
* Cause is poor atomization, improper
injection timing, etc. Because of
Combustion is trouble in injection system or in poor
incomplete. valve adjustment, or compression
leakage, poor compression, etc.
Check for the cause.
When engine must be stopped immediately
Cause
Engine revolution
suddenly * Check the adjustments, injection
decreases or timing and the fuel system.
increases.
Unusual sound is
* Check all moving parts carefully.
heard suddenly.
Color of exhaust
* Check the fuel injection system,
suddenly turns
especially the fuel injection nozzle.
dark.
Bearing parts are
* Check the lubricating system.
overheated.
* Check the lubricating system.
* Check, if the engine bearing
clearances are within factory specs.
Oil lamp lights up
* Check the function of the relieve
during operation.
valve in the lubricating system.
* Check pressure switch.
* Check filter base gasket.
Countermeasures
Countermeasures
Countermeasures
When engine overheats
Cause
Engine oil * Check oil level. Replenish oil as
insufficient required.
Fan belt broken or
* Change belt or adjust belt tension.
elongated
Coolant insufficient * Replenish coolant.
Excessive
* Add water only or change to coolant
concentration of
with the specified mixing ratio.
antifreeze
Radiator net or
radiator fin clogged * Clean net or fin carefully.
with dust
Inside of radiator
or coolant flow * Clean or replace radiator and parts.
route corroded
Fan or radiator or
radiator cap * Replace defective parts.
defective
Thermostat * Check thermostat and replace if
defective necessary.
Temperature
* Check temperature with thermometer
gauge or sensor
and replace if necessary.
defective
Overload running * Reduce load.
Head gasket
defective or water * Replace parts.
leakage
Incorrect injection
* Adjust to proper timing.
timing
Unsuitable fuel
* Use the specified fuel.
used
Countermeasures