D439E Service Manual 4. Fuel system
194
Injector
Components
CAUTION
• Since common rail fuel injection system
operates at high pressure (1600bar), a special
caution should be exercised.
• While engine is running or within 1 minute after
engine stops no works should be made In
relation to common rail fuel injection system.
• In particular, as the Injector solenoid generates
high temperature heat, do not touch it with bare
hands Start the service works only when
engine has been cooled down enough after
engine stops.
• Always keep the safety precautions.
• Ensure working area cleans all the time, and
place the removed injector on the clean cloth
and pay attention to Injector nozzle so that at it
is not polluted by foreign materials.
• Remove the protective caps for Injector and
fuel hose immediately just before performing
the installation.
• When Installing or removing injector, clean the
injector contacting portion and replace O-ring
and nozzle gasket with new one.
• Apply diesel to the O-ring of the Injector before
inserting them into the cylinder head.
• Install injector to the cylinder head vertically
and install It correctly not to cause any damage
such as shock.
• Observe bolts tightening torque when Inserting
and tightening the Injector.
• Never reuse the high-pressure fuel pipe.
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