Troubleshooting; When It Is Difficult To Start The Engine; When Starter Does Not Start - Kubota SQ-1120 Operator's Manual

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TROUBLESHOOTING

TROUBLESHOOTING
MOKUJIYOU
If the engine does not function properly, use the following chart to identify and correct the cause.
BWhen it is Difficult to Start the Engine
Cause
*Check the fuel tank and fuel filter.
Remove water, dirt and other
impurities.
Fuel is thick and *As all fuel will be filtered by the filter,
doesn't flow. if there should be water or other
foreign matters on the filter, clean the
filter with kerosene or replace the
filter.
*If air is in the fuel filter or injection
lines, the fuel pump will not work
properly. To attain proper fuel
injection pressure, check carefully for
Air or water
loosened fuel line coupling, cap nut
mixed in fuel
and etc.
system.
*Loosen joint bolt atop fuel filter and
air vent screws of fuel injection pump
to eliminate all the air in the fuel
system.
*This is caused when water or dirt is
mixed in the fuel. Clean the nozzle
Thick carbon
injection piece, being careful not to
deposits on
damage the orifice.
orifice of
*Check to see if nozzle is working
injection nozzle.
properly or not. If not, install a new
nozzle.
*[Engine model : D1703-EBG,
V2203-EBG]
Adjust valve clearance to 0.18 to
Valve clearance
0.22 mm when the engine is cold.
is wrong.
[Engine model : V3300-EBG]
Adjust valve clearance to 0.23 to
0.27 mm when the engine is cold.
Leaking valves *Grind valves.
*Adjust injection timing
*[Engine model : D1703-EBG]
The injection timing 15.5 before top
dead center.
Fuel injection [Engine model : V2203-EBG]
timing is wrong. The injection timing 17.0 before top
dead center.
[Engine model : V3300-EBG]
The injection timing 10.0 before top
dead center.
Engine oil *Change grade of oil according to the
becomes thick weather (temperature).
in cold weather
and engine
cranks slow.
Countermeasures
Cause
*Bad valve or excessive wear of
Low rings, pistons and liners cause
compression insufficient compression.
Replace with new parts.
*Charge battery.
Battery is
*In winter, always remove battery
discharged and
from machine, charge fully and keep
the engine will
indoors.
not crank.
Install in machine at time of use.
A If the cause of trouble cannot be found, contact your
local KUBOTA Dealer.
BWhen Starter does not Start
Cause
Emergency *Rotate button to reset emergency
switch "ON" stop.
Battery *Recharge battery.
discharges too
much
Access door is *Close the door.
opened.
Defect of *Check wiring and repair.
contact point or
shortage of
alternator L-
shaped coupler
Alternator defect *Replace.
Fuse blows. *Replace.
Countermeasures
Countermeasures