Kubota tractor (BX25DLB-AU, LA240A, LA240A, AU-SG, BT602). OPERATOR'S MANUAL - part 36
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TROUBLESHOOTING
TROUBLESHOOTING
ENGINE TROUBLESHOOTING
If something is wrong with the engine, refer to the table below for the cause and its corrective measure.
If you have any questions, consult 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 OF
THE TRACTOR" section.)
A
Remove water from the system and replace
the fuel filter.
A
In winter, oil viscosity increases,
and engine revolution is slow.
A
Use oils of different viscosities, depending on
ambient temperatures.
A
Use engine block heater. (Option)
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 tractor only when the tractor 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
Loose or defective fan belt.
A
Adjust or replace fan belt.
A
Dirty radiator core or grille screens. A Remove all trash.
A
Coolant flow route corroded.
A
Flush cooling system.