Operation Manual

72
TROUBLESHOOTING
TROUBLESHOOTING
ENGINE
TROUBLESHOOTING
If
something
is wrong with
the
engine,
refer to
the
table
below for
the
cause
and
its corrective
measure.
Trouble
Cause
Countermeasure
Engine
is difficult to
start
or
won't
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"
in "SERVICE AS
REQUIRED"
in
"PERIODIC
SERVICE"
section.)
Remove
water
from
the
system
and
replace
the
fuel
filter.
In winter, oil
viscosity
increases,
and
engine
revolution is slow.
Use
oils of different
viscosities,
depending
on
ambient
temperatures.
Use
engine
block
heater.
(Option)
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.
Insufficient
engine
power.
Insufficient or dirty fuel.
The
air
cleaner
is
clogged.
Check
the
fuel
system.
Clean
or
replace
the
element.
Engine
stops
suddenly.
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
exhaust
muffler
is
dumped
with fuel.
Injection
nozzle
trouble.
Fuel
quality is poor.
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
defective
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,
consult
your
local KUBOTA
Dealer.