Perkins Motor Operation and Maintenance Manual (English) - REED
Perkins Motor Operation and Maintenance Manual (English) - REED
Perkins Motor Operation and Maintenance Manual (English) - REED
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SEBU8325-01 67<br />
<strong>Maintenance</strong> Section<br />
Fuel Injector - Test/Change<br />
Refer to Systems <strong>Operation</strong>/Testing <strong>and</strong> Adjusting,<br />
“Engine Valve Lash - Inspect/Adjust” for more<br />
information.<br />
i02682385<br />
Fuel Injector - Test/Change<br />
The fuel injectors should not be cleaned as cleaning<br />
with incorrect tools can damage the nozzle. The fuel<br />
injectors should be renewed only if a fault with the<br />
fuel injectors occurs. Some of the problems that may<br />
indicate that new fuel injectors are needed are listed<br />
below:<br />
• The engine will not start or the engine is difficult<br />
to start.<br />
• Not enough power<br />
Fuel leaked or spilled onto hot surfaces or electrical<br />
components can cause a fire.<br />
NOTICE<br />
Do not allow dirt to enter the fuel system. Thoroughly<br />
clean the area around a fuel system component that<br />
will be disconnected. Fit a suitable cover over disconnected<br />
fuel system component.<br />
NOTICE<br />
If a fuel injector is suspected of operating outside of<br />
normal parameters it should be removed by a qualified<br />
technician. The suspect fuel injector should be taken<br />
to an authorised agent for inspection.<br />
• Theenginemisfires or the engine runs erratically.<br />
• High fuel consumption<br />
• Black exhaust smoke<br />
• The engine knocks or there is vibration in the<br />
engine.<br />
• Excessive engine temperature<br />
Removal <strong>and</strong> Installation of the<br />
Fuel Injectors<br />
Work carefully around an engine that is running.<br />
Engine parts that are hot, or parts that are moving,<br />
can cause personal injury.<br />
Make sure that you wear eye protection at all<br />
times during testing. When fuel injection nozzles<br />
are tested, test fluids travel through the orifices<br />
of the nozzle tip with high pressure. Under this<br />
amount of pressure, the test fluid can pierce the<br />
skin <strong>and</strong> cause serious injury to the operator.<br />
Always keep the tip of the fuel injection nozzle<br />
pointed away from the operator <strong>and</strong> into the fuel<br />
collector <strong>and</strong> extension.<br />
NOTICE<br />
If your skin comes into contact with high pressure fuel,<br />
obtain medical assistence immediately.<br />
Illustration 35<br />
Typical fuel Injector<br />
g01347499<br />
Operate the engine at a fast idle speed in order to<br />
identify the faulty fuel injector. Individually loosen <strong>and</strong><br />
tighten the union nut for the high pressure pipe to<br />
each fuel injector. Do not loosen the union nut more<br />
than half a turn. There will be little effect on the engine<br />
speed when the union nut to the faulty fuel injection<br />
nozzle is loosened. Refer to the Disassembly <strong>and</strong><br />
Assembly <strong>Manual</strong> for more information. Consult your<br />
authorized <strong>Perkins</strong> dealer or your <strong>Perkins</strong> distributor<br />
for assistance.