Kubota MX4800, Operator'S Manual

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96 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, contact 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" section.)
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 (Optional)
A
Battery becomes weak and the
engine does not turn over quick
enough.
A
Clean battery cables & 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.
A
Preheat (glow plug) system
trouble.
A
Check to see if the slow blow fuse of the
preheat (glow plug) blows.
A
Check to see if the preheat (glow plug)
functions in cold weather.
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
damp with fuel.
A
Injection nozzle trouble.
A
Fuel quality is poor.
A Check to see if the preheat (glow plug)
functions in cold weather.
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.
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