Troubleshooting; Engine Troubleshooting - Kubota zd 331 Manual

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

If something is wrong with the engine, refer to the table below for the cause and its corrective measure.
Trouble
Engine is difficult to start or
won't start
Insufficient engine power.
Engine stops suddenly.
Exhaust fumes are
colored. Black
Blue
white
Engine overheats.
If you have any questions, contact your local KUBOTA Dealer.
Cause
A No fuel flow.
A Air or water is in the fuel system. A Check to see if the fuel line coupler bolt and
A In winter, oil viscosity increases,
and engine revolution is slow.
A Battery becomes weak and the
engine does not turn over quick
enough.
A Insufficient or dirty fuel.
A The air cleaner is clogged.
A Insufficient fuel.
A Fuel quality is poor.
A Too much oil.
A Engine is overloaded.
A The inside of exhaust muffler is
dumped with fuel.
A Injection nozzle trouble.
A Fuel quality is poor.
A Engine overloaded.
A Low coolant level.
A Loose or defective fan belt.
A Dirty radiator core
screens.
A Coolant flow route corroded.
A Check the fuel valve position.
A Check the fuel tank and the fuel filter.
Replace filter if necessary.
nut are tight.
A Bleed the fuel system. (See "SERVICE AS
REQUIRED"
section.)
A Use oils of different viscosities, depending on
ambient temperatures.
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 machine only when the
machine is going to be used.
A Check the fuel valve position.
A Check the fuel system.
A Clean the element.
A Check the fuel valve position.
A Refuel.
A Bleed the fuel system if necessary.
A Change the fuel and fuel filter.
A Check the proper amount of oil.
A Reduce engine load.
A Heat the muffler by applying load to the
engine.
A Check the injection nozzle.
A Change the fuel and fuel filter.
A Lower speed or reduce load.
A Fill cooling system to the correct level;
check radiator
connections or leaks.
A Adjust or replace fan belt.
or grille A Remove all trash.
A Flush cooling system.
TROUBLESHOOTING
Countermeasure
in "PERIODIC SERVICE"
and hoses for
79
loose