TROUBLESHOOTING
ENGINE TROUBLESHOOTING
If something is wrong with the engine, refer to the following table for the cause and its corrective measure.
Trouble
Cause
Countermeasure
Engine is difficult to
start or will not start.
•
No fuel flow.
•
Check the fuel tank and the fuel filter.
Replace filter if necessary.
•
Air or water is in the fuel system.
•
Check to see if the fuel line coupler bolt and nut are tight.
•
Bleed the fuel system
(See Bleeding fuel system on page 131.)
•
In winter, oil viscosity increases, and en-
gine revolution is slow.
•
Use oils of different viscosities, depending on ambient tempera-
tures.
•
Use engine block heater (optional).
•
Battery becomes weak and the engine
does not turn over quick enough.
•
Clean battery cables and terminals.
•
Charge the battery.
•
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.
M4N-071
•
Preheat (glow plug) system trouble.
•
Check to see if the slow blow fuse of the preheat (glow plug)
blows.
•
Check to see if the preheat (glow plug) functions in cold weather.
M5N-091, M5N-111
•
Intake air heater system trouble.
•
Check to see if the slow blow fuse of the intake air heater blows.
•
Check to see if the intake air heater functions in cold weather.
Insufficient engine
power.
•
Insufficient or dirty fuel.
•
The air cleaner is clogged.
•
Check the fuel system.
•
Clean or replace the element.
M5N-091, M5N-111
•
DEF/AdBlue
®
runs short
•
Add DEF/AdBlue
®
.
Engine stops sud-
denly.
•
Insufficient fuel.
•
Refuel.
•
Bleed the fuel system if necessary.
Exhaust
fumes are
colored.
Black
•
Fuel quality is poor.
•
Too much oil.
•
The air cleaner is clogged.
•
Change the fuel and fuel filter.
•
Check the proper amount of oil.
•
Clean or replace the element.
Blue
white
•
The inside of the exhaust muffler is damp
with fuel.
•
Injection nozzle trouble.
•
Fuel quality is poor.
•
Check to see if the intake air heater functions in cold weather.
•
Heat the muffler by applying load to the engine.
•
Check the injection nozzle.
•
Change the fuel and fuel filter.
Engine overheats.
•
Engine overloaded.
•
Shift to lower gear or reduce load.
•
Low coolant level.
•
Fill cooling system to the correct level; check radiator and hoses
for loose connections or leaks.
•
Loose or damaged fan belt.
•
Adjust or replace fan belt.
•
Dirty radiator core or grille screens.
•
Remove all trash.
•
Coolant flow route corroded.
•
Flush cooling system.
If you have any questions, contact your local KUBOTA Dealer.
ENGINE TROUBLESHOOTING
TROUBLESHOOTING
M4N-071, M5N-091, M5N-111
137
Summary of Contents for M4N-071
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Page 21: ...SAFETY LABELS SAFE OPERATION M4N 071 M5N 091 M5N 111 15...
Page 22: ...SAFE OPERATION 16 M4N 071 M5N 091 M5N 111...
Page 23: ...SAFE OPERATION M4N 071 M5N 091 M5N 111 17...
Page 24: ...SAFE OPERATION 18 M4N 071 M5N 091 M5N 111...
Page 26: ...20 M4N 071 M5N 091 M5N 111...
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