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DIESEL FUEL SYSTEM 16. Carbon may be removed from the nozzle valve cone by inserting the valve into the tool illustrated anti-clockwise manner whilst pressing the valve inward. If the nozzle is blued or the seating has a dull circumferential ring indicating pitting or wear, Do not attempt to lap the nozzle valve to body. This process requires special equipment and 17. Clean the auxiliary spray hole using the special tool fitted with probing wire in) diameter. NOTE: Allow (0.062 in) only to extend from the chuck and thus minimise the possibility of of the wire inthehole. ST 18. Examine pressure of nozzle body and nozzle holder to ascertain their freedom from perfectly smooth. 19. With the flushing tool secured to the nozzle testing outfit, fit the nozzle body (spray holes uppermost) vigorously. This flushing process is necessary for which may have become lodged in the body after scraping and probing. ST . . . . . . . . . . Assemble Fit the nozzle valve to nozzle and check for freedom of movement. 21. Immerse the nozzle body and valve in the fluid bath and assemble whilst submerged. 22. Wash the remaining components and assemble the injector in the sequence illustrated during the 23. Set the injection nozzle assembly in accordance with the following test procedure. Bench test injector nozzle and holder assembly 24. To check a nozzle assembly and to ensure that it is functioning correctly, a setting outfit, as illustrated, or non-ferrous sheet metal is most suitable for mounting the outfit; such a surface facilitates the cleanliness essential when checking nozzle parts. prevent spilt fuel spreading. Small containers may of each assembly. These parts are carefully mated by t h e manufacturers and must not be interchanged. Lastly, a small bath with a cover, 37 be positioned to |