Perkins 402D, 403D, 404D Industrial Engine. Manual - part 19
SEBU8311-01
75
Maintenance Section
Fuel Injector - Test/Change
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 flywheel.
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.
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Fuel Injector - Test/Change
Fuel leaked or spilled onto hot surfaces or electri-
cal components can cause a fire.
Make sure that you wear eye protection at all
times during testing. When fuel injection nozzles
are tested, test fluids travel through the orifices
of the nozzle tip with high pressure. Under this
amount of pressure, the test fluid 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 difficult
to start.
•
Not enough power
•
The engine misfires 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.
Identification 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.
NOTICE
If a fuel injector is suspected of operating outside of
normal parameters it should be removed by a qualified
technician. The suspect fuel injector should be taken
to an authorised agent for inspection.