Maintenance and care
34
Before reassembly thoroughly wash
nozzle body and needle in clean test oil.
Hold the needle at the pintle end only; to
avoid corrosion do not touch the lapped
surfaces of the needle with your fingers.
Thoroughly clean all other parts of the
nozzle holder with clean fuel.
Check nozzle discharge pressure in
nozzle tester.
The edge-type filter should not be pressed
into the nozzle holder by approx. 5 mm.
If this depth is exceeded the injector must
be replaced.
1
1 Edge-type filter
Check nozzle discharge pressure in
nozzle tester. Adjust the discharge pres-
sure by inserting shims of suitable thick-
ness under the compression spring.
Caution:
Do not hold your hands under the fuel
jet, as there is a risk of injury. Do not
inhale the atomised fuel. If possible
work under an extraction system.
Installation
Clean seat in cylinder head.
Insert nozzle holder with new gasket.
Tighten union nut with 120 Nm.
Install injection lines free of constraint.
Install leak fuel lines.
Caution:
The injection lines are designed for
high operating pressures and should
thus be handled with particular care.
D When mounting the pipes to the engine
take care of good fitness
D Do not bend pipes to permanent de-
formation (not for replacing the nozzles
either)
D Do not mount any heavily bent pipes
D Avoid bending the pipes at the ends by
more than 2 to 3 degrees
D In case of faults in the injection system
which might have resulted in excessive
operating pressures, not only the failed
part but also the injection line has to be
replaced
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