26 TROUBLESHOOTING
ENGLISH
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 B When 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 joint bolt stop fuel filter and air
vent screws of fuel injection pump to
eliminate all the air in the fuel system.
Valve clearance is
not as specified.
*
Adjust valve clearance to 0.18 to 0.22
mm (0.007 to 0.0087 in.) when the
engine is cold.
[D1703-M-E3BG, V2003-M-E3BG,
V2003-M-T-E3BG, V2203-M-E3BG,
V2403-M-E3BG]
0.145 to 0.185 mm
(0.0057 to 0.0072 in.)
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
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 of
0.18 to 0.22 mm (0.007 to 0.087 in.)
with engine cold.
[D1703-M-E3BG, V2003-M-E3BG,
V2003-M-T-E3BG, V2203-M-E3BG,
V2403-M-E3BG]
0.145 to 0.185 mm
(0.0057 to 0.0072 in.)
Air cleaner is dirty
*
Clean the element every 100 hours of
operation.
Fuel injection
pressure is wrong.
*
Check injection pressure.
13.7 MPa (140 kgf/cm , 1991 psi)
Injection pump
wear
*
*
Do not use poor quality fuel as it will
cause wear of the pump. Only use No.
2-D diesel fuel.(See "FUEL" in
"PERIODIC SERVICE" Section)
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.
E.book 26 ページ ２００９年４月２３日 木曜日 午前１０時３１分
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