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11. Troubleshooting
Fuel is thick
and doesn’t
Flow
Air or water
mixed in fuel
system
Thick carbon
deposits on
orifice of
injection nozzle.
Valve clearance
is wrong
* 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
of other foreign matters on the
filter, replace the filter.
* 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 cap nut, etc.
* 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.
* Adjust valve clearance inlet 0.2
mm (0.0079 in.), exhaust
0.45mm (0.0177 in.) when the
engine is cold.
Cause
Countermeasures
11.1 Engine Troubleshooting
When Engine is Difficult to Start
Leaking valves
Fuel injection
timing is wrong
Engine oil
become thick in
cold weather
and engine
cranks slow.
Low
compression
Battery is
discharge and
the engine will
not crank.
* Grind valve
* Adjust injection timing.
* The injection timing (before top
dead center) 7°(0.122 rad.)
* Change grade of oil according
to the weather (temperature).
* Bad valve or excessive wear of
rings, pistons and liners
cause insufficient compres-
sion. Replace with new parts.
* Charge battery.
* Use decompression device.
* In winter, always remove
battery from tractor, charge fully
and keep indoors.
Install in tractor at time of use.
Cause
Countermeasures
