47TROUBLESHOOTING
ENGLISH
TROUBLESHOOTING
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 BWhen output is insufficient
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.
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, loose cap nut, etc.
*Loosen air vent screws stop fuel filter
and 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
not as specified.
*Adjust valve clearance when the
engine is cold.
Leaking valves *Grind valve.
Fuel injection
timing is not as
specified.
*Check injection timing.
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
Carbon stuck
around orifice of
nozzle piece
*Clean orifice and needle valve, being
very careful not to damage the nozzle
orifice.
*Check nozzle to see if good. If not,
replace with new parts.
Compression is
insufficient.
Leaking valves
*Bad valve and excessive wear of rings,
pistons and liners cause insufficient
compression. Replace with new parts.
*Grind valves.
Fuel is insufficient. *Check fuel system.
Overheating of
moving parts
*Check lubricating oil system.
*Check to see if lubricating oil filter is
working properly.
*Filter element deposited with
impurities would cause poor lubrication.
Change element.
*Check the clearance of bearing are
within factory specs.
*Check injection timing.
*Adjust timing.
Valve clearance is
not as specified.
*Adjust to proper valve clearance when
the engine is cold.
Air cleaner is dirty
*Clean the element every 100 hours of
operation.
Fuel injection
pressure is not as
specified.
*Check injection pressure.
Injection pump
wear
*Do not use poor quality fuel for it will
cause wear of the pump. Only use No.
2-D diesel fuel.
*Check the fuel injection pump element
and delivery valve assembly and
replace as necessary.
A If the cause of trouble can not be found, contact your KUBOTA dealer.
To Next Page
Loading...
