2.2.13. Removal, dismantling and cleaning z Unscrew delivery pipe at nozzle holder z Remove leak-off pipe. and at the injection pump. z Release union screw of nozzle holder with special wrench. (EI.03004-0225) z Remove nozzle holder with gasket from the cylinder head. EA6O5007 Note for cleaning nozzles z Clean nozzle body externally from soot and carbon, When cleaning several nozzles at the same time, make sure nozzle bodies and needles are not mixed up. Visually inspect needle and body. z Cleaning is useless if the seat of the needle is indented or the pintle is damaged and the nozzle z Clean annular groove with scraper over full circumference.
Wash out dislodged carbon deposits should be replaced. and dirt. z Scrape needle seat with cleaning cutter, Dip cutter in test oil before use. The cutter can also be clamped in a lathe. z Polish needle seat with wooden cleaning tool, preferably by chucking the needle in a lathe at the z Clean the spray holes of nozzles by chucking a cleaning needle of suitable diameter in the collect. pintle end. If the carbon deposits in the spray holes cannot be removed by rotating and pressing, have the needle project only slightly from the collect and drive out the carbon by lightly tapping on the tool. z Before reassembly thoroughly wash nozzle body and needle in clean test oil.
z Hold the needle at the pintle end only ; to avoid corrosion, do not touch the lapped surfaces of the needle with you fingers. z Thoroughly clean all other parts of the nozzle holder with clean fuel. z Check nozzle discharge pressure in nozzle tester. The edge-type filter should not be pressed into the nozzle holder by more than about 5mrn. If this depth is exceeded the injector must be replaced. CAUTION : Do not hold your hands under the fuel jet, as there is a rise of injury. Do not inhale the atomized oil fuel. If possible, work under an extraction system. EA6O5008 Technical Information - 28 - New nozzle holder 300 + 8 kg/cm2 Used nozzle holder 285 + 8 kg/cm2