Perkins 1103D Operation And Maintenance Manual page 63

SEBU8352-02
The fuel injector (1) will need to be removed and the
injector will need to be checked for performance.
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
Removal and Installation of the
Fuel Injectors
Work carefully around an engine that is running.
Engine parts that are hot, or parts that are mov-
ing, can cause personal injury.
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. Al-
ways keep the tip of the fuel injection nozzle
pointed away from the operator and into the fuel
collector and extension.
NOTICE
If your skin comes into contact with high pressure
fuel, obtain medical assistence immediately.
Operate the engine at a fast idle speed in order to
identify the faulty fuel injector. Individually loosen and
tighten the union nut for the high pressure pipe to
each fuel injector. Do not loosen the union nut more
than half a turn. There will be little effect on the
engine speed when the union nut to the faulty fuel
injection nozzle is loosened. Refer to the
Disassembly and Assembly Manual for more
information. Consult your authorized Perkins dealer
or your Perkins distributor for assistance.
Fuel System - Prime
If air enters the fuel system, the air must be purged
from the fuel system before the engine can be
started. Air can enter the fuel system when the
following events occur:
• The fuel tank is empty or the fuel tank has been
partially drained.
• The low pressure fuel lines are disconnected.
• A leak exists in the low pressure fuel system.
• The fuel filter is replaced.
• A new injection pump is installed.
Use the following procedure in order to remove air
from the fuel system:
1. Ensure that all fuel connections are installed
correctly.
2. Turn the keyswitch to the RUN position. Leave the
keyswitch in the RUN position for three minutes. If
a manual purging screw is installed, slacken the
manual purging screw during priming the fuel
system.
3. Crank the engine with the throttle lever in the
closed position until the engine starts.
63
Maintenance Section
Fuel System - Prime
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