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Exhaust system > < Charge air system with exhaust gas turbocharger

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Removing and installing O-rings for unit injector
Removing and installing O-rings for unit injector
Special tools and workshop equipment required
t  Assembly device -T10056-
Removing
–  Lever off the O-rings from the grooves of the unit injector with extreme care.
–  Make sure, above all, that the seating surfaces in the slots of the O-rings are not damaged.
Install
  Note
t  Always use the assembly sleeves to install the O-rings. If they are not used there is a risk that the O-rings may become damaged.
t  Observe the correct allocation of the O-rings to the grooves: The ring thickness reduces in the direction of the injection nozzle.
t  Avoid rolling the O-rings when inserting them. The O-rings must not be turned inwards on the slots of the unit injector.
–  Remove the heat-protection seal along with the circlip.
–  Clean the contact surfaces for the O-rings in the grooves of the unit injector with great care.
   
–  Insert the assembly sleeve -T10056/1- on the unit injector up to the stop.
–  Carefully slide the upper, thicker O-ring onto the assembly sleeve and in the groove of the unit injector.
–  Remove assembly device.
  S23-0181
–  Insert the assembly sleeve -T10056/2- on the unit injector up to the stop.
–  Carefully slide the middle, thinner O-ring onto the assembly sleeve and in the groove of the unit injector.
–  Remove assembly device.
  S23-0182
–  Insert the assembly sleeve -T10056/3- on the unit injector up to the stop.
–  Carefully slide the lower O-ring onto the assembly sleeve and insert it in the groove of the unit injector.
–  Remove assembly device.
–  Insert a new heat-protection seal together with the circlip.
  S23-0183

Exhaust system > < Charge air system with exhaust gas turbocharger