Troubleshooting - KUBOTA Z482-E3 Manual De Instrucciones

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TROUBLESHOOTING

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
Air or water mixed
pressure, check carefully for loosened
in fuel system
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.
* Adjust valve clearance to 0.145 to
Valve clearance is
0.185 mm (0.0057 to 0.0072 in.) when
wrong.
the engine is cold.
Leaking valves * Grind valve.
Fuel injection timing
* Check injection timing
is wrong.
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.
* Charge battery.
Battery is
* In winter, always remove battery from
discharged and the
machine, charge fully and keep
engine will not
indoors. Install in machine at time of
crank.
use.
A If the cause of trouble can not be found, contact your KUBOTA dealer.
Countermeasures
B When output is insufficient
Cause
* Bad valve and excessive wear of
Compression is rings, pistons and liners cause
insufficient. insufficient compression. Replace with
Leaking valves new parts.
* 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
Overheating of impurities would cause poor
moving parts lubrication. Change element.
* Check the clearance of bearing are
within factory specs.
* Check injection timing.
* Adjust timing.
* Adjust to proper valve clearance of
Valve clearance is
0.145 to 0.185 mm (0.0057 to 0.0072
wrong.
in.) with engine cold.
* Clean the element every 100 hours of
Air cleaner is dirty
operation.
Fuel injection * Check injection pressure.
pressure is wrong. 13.7 Mpa (140 kgf/cm ; 1991 psi)
* Do not use poor quality fuel as it will
cause wear of the pump. Only use No.
2-D diesel fuel. (See "FUEL" in
Injection pump
"PERIODIC SERVICE" section.)
wear
* Check the fuel injection pump element
and delivery valve assembly and
replace as necessary.
Countermeasures