This document is printed from SPI². Not for RESALE
78
SEBU8311-02
Maintenance Section
Fuel Injector - Test/Change
NOTICE
Only quali
fi
ed service personel should perform this
maintenance. Refer to the Service Manual or your au-
thorized Perkins dealer or your Perkins distributor for
the complete valve lash adjustment procedure.
Operation of Perkins engines with incorrect valve lash
can reduce engine ef
fi
ciency, and also reduce engine
component life.
Ensure that the engine can not be started while
this maintenance is being performed. To help pre-
vent possible injury, do not use the starting motor
to turn the
fl
ywheel.
Hot engine components can cause burns. Allow
additional time for the engine to cool before mea-
suring/adjusting valve lash clearance.
Ensure that the engine is stopped before measuring
the valve lash. The engine valve lash can be
inspected and adjusted when the temperature of the
engine is hot or cold.
Refer to Systems Operation, Testing and Adjusting,
“Engine Valve Lash - Inspect/Adjust” for more
information.
i02154268
Fuel Injector - Test/Change
Fuel leaked or spilled onto hot surfaces or electri-
cal components can cause a
fi
re.
Make sure that you wear eye protection at all
times during testing. When fuel injection nozzles
are tested, test
fl
uids travel through the ori
fi
ces
of the nozzle tip with high pressure. Under this
amount of pressure, the test
fl
uid can pierce the
skin and cause serious injury to the operator.
Always keep the tip of the fuel injection nozzle
pointed away from the operator and into the fuel
collector and extension.
NOTICE
Do not allow dirt to enter the fuel system. Thoroughly
clean the area around a fuel system component that
will be disconnected. Fit a suitable cover over discon-
nected fuel system component.
Regular maintenance of the fuel injectors is
recommended by Perkins. The fuel injectors must
be removed and tested by an authorized agent. The
fuel injectors should not be cleaned as cleaning with
incorrect tools can damage the nozzle. The fuel
injectors should be renewed only if a fault with the
fuel injectors occurs. Some of the problems that may
indicate that new fuel injectors are needed are listed
below:
•
The engine will not start or the engine is dif
fi
cult
to start.
•
Not enough power
•
The engine mis
fi
res or the engine runs erratically.
•
High fuel consumption
•
Black exhaust smoke
•
The engine knocks or there is vibration in the
engine.
•
Excessive engine temperature
For further information on the removal and the
installation of the fuel injectors, refer to the
Disassembly and Assembly manual.
For further information on the testing of fuel injectors,
refer to the Testing and Adjusting manual.
Identi
fi
cation of a suspect Fuel
Injector
Work carefully around an engine that is running.
Engine parts that are hot, or parts that are moving,
can cause personal injury.
NOTICE
If your skin comes into contact with high pressure fuel,
obtain medical assistence immediately.