Troubleshooting - Kubota D1503-M-E Operator's Manual

1ABK0000132.book 25 ページ ２００４年２月１９日 木曜日 午前１０時３０分

TROUBLESHOOTING

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
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, if
doesn't flow.
there should be water or other foreign
matters on the filter, clean the filter with
kerosene.
*If air is in the fuel filter or injection lines,
the fuel pump will not work properly. To
attain proper fuel injection pressure,
Air or water mixed check carefully for loosened fuel line
in fuel system coupling, loose cap nut, etc.
*Loosen joint bolt stop 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 orifice damage the orifice.
of injection nozzle. *Check to see if nozzle is working
properly or not. If not, install a new
nozzle.
*Adjust valve clearance to 0.18 to
Valve clearance is
0.22mm(0.007 to 0.0087 in.) when the
wrong.
engine is cold.
Leaking valves *Grind valve.
*Adjust injection timing
Fuel injection timing
*The injection timing 0.31 rad(18 )
is wrong.
before top dead center.
Engine oil becomes
thick in cold *Change grade of oil according to the
weather and engine weather (temperature.)
cranks slow.
*Bad valve or excessive wear of rings,
Low compression pistons and liners cause insufficient
compression. Replace with new parts.
Battery is *Charge battery.
discharged and the *In winter, always remove battery from
engine will not machine, charge fully and keep indoors.
crank. Install in machine at time of use.
A If the cause of trouble can not be found, contact your KUBOTA dealer.
Countermeasures
TROUBLESHOOTING
B When output is insufficient
Cause Countermeasures
*Clean orifice and needle valve, being
Carbon stuck very careful not to damage the nozzle
around orifice of orifice.
nozzle piece *Check nozzle to see if good. If not,
replace with new parts.
*Bad valve and excessive wear of rings,
Compression is
pistons and liners cause insufficient
insufficient.
compression. Replace with new parts.
Leaking valves
*Grind valves.
Fuel is insufficient. *Check fuel system.
*Check lubricating oil system.
*Check to see if lubricating oil filter is
working properly.
*Filter element deposited with impurities
would cause poor lubrication. Change
Overheating of
element.
moving parts
*Check the clearance of bearing are
within factory specs.
*Check injection timing.
*Adjust timing 0.31 rad(18 ) before top
dead center.
*Adjust to proper valve clearance of
Valve clearance is
0.18 to 0.22 mm(0.007 to 0.0087 in.)
wrong.
with engine cold.
*Clean the element every 100 hours of
Air cleaner is dirty
operation.
Fuel injection *Adjust to proper pressure. 13.7Mpa
pressure is wrong. (140 kgf/cm ; 1991 psi)
*Do not use poor quality fuel as it will
cause wear of the pump. Only use No.
Injection pump 2-D diesel fuel.
wear *Check the fuel injection pump element
and delivery valve assembly and
replace as necessary.
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