Kubota Z482-E Operator's Manual page 35

• When engine suddenly stops
Cause Countermeasures
*Check the fuel tank and refill the fuel, if
Lack of fuel
necessary.
*Also check the fuel system 'for air or
leaks.
Bad nozz,le
*If necessary, replace with a new
nozzle.
Moving parts are
·check amount of engine oil with oil
overheated due to
level gauge.
shortage of
*Check lubricating oil system.
lubrication oil or
*At every 2 times of oil change, oil filter
improper
cartridge should be replaced.
lubrication.
*Check to see if the engine bearing
clearances is within factory specs.
NOTE:
• When the engine has suddenly stopped, decompress
the engine by the decomp and 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.
• When color of exhaust is especially bad
Cause
Countermeasures
Fuel governing
*Contact dealer for repairs.
device bad
Fuel is of extremely *Select good quality fuel.
poor quality. Use No. 2-D diesel fuel only.
Nozzle is bad. *If necessary, replace with new nozzle.
*Cause Is poor atomization, improper
injection timing, etc. Because of trouble
Combustion is In injection system or in poor valve
incomplete.
adjustment, or compression leakage,
poor compression, etc.
Check for the cause.
TROUBLESHOOTING
23
• When engine must be stopped immediately
Cause Countermeasures
Engine revolution
suddenly *Check the adjustments, injection timing
decreases or 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
dark.
especially the fuel injection nozzle.
Bearing parts are
*Check the lubricating system.
overheated.
-
*Check the lubricating system.
•check, if the engine bearing
Oil lamp lights up
clearances are within factory specs.
*Check the function of the relieve valve
during operation.
in the lubricating system.
*Check pressure switch.
*Check filter base gasket.
• When engine overheats
Cause Countermeasures
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
antifreeze
with 'the specified mixing ratio.
Radiator net or
radiator fin clogged *Clean net or fin carefully.
with dust
Inside of radiator or
coolant flow route
·c1ean or replace radiator and parts.
corroded
Fan or radiator or
radiator cap
•Replace defective parts.
defective
Thermostat
•check thermostat and replace if
defective necessary.
Temperature gauge
*Check temperature with thermometer
or sensor defective
and replace if necessary.
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