Kubota SQ-1120, Руководство оператора, Страница: 55 / 63

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