Fuel Injection Nozzle - Caution

9226mercedes01

Group
07/21


March 1992
Distribution TDF
Supersedes 07/21 (July 1989)





Fuel Injection Nozzle, Line, and Pump Cleanliness

Description of Revisions:
This SI replaces the previous version dated July 1989. Changes include: Protective plastic cover vendors are listed, dimensions of the fuel injection system openings are listed.

The fuel injection nozzle has not contained a fuel filter cartridge (edge filter) since 1988. See Fig 1. The lack of a filter cartridge requires extreme cleanliness during service operations involving the fuel injection nozzles.

Immediately after removing the fuel injection and return lines from a nozzle assembly, and before removing the assembly from the engine, cap the fuel injection and return lines and the nozzle assembly fuel intake and fuel return openings. After removing the nozzle assembly from the engine, cap the nozzle and seal the assembly in a plastic bag to prevent contaminants from entering the nozzle.

If the injection lines are removed from the injection pump, both the injection lines and the injection pump outlets should be capped.

Some sources for protective plastic covers are listed.


Alliance Plastics
3123 Station Road
Erie, PA 16510-0284
(814) 899-7671


Caplugs Division
2150 Elmwood Avenue
Buffalo, NY 14207
(716) 876-9855


Caplugs Division
7310 S. La Cienago Blvd.
Inglewood, CA 90302
(213) 671-1232





Since the various vendors use different part numbers for different diameter sizes, the actual dimensions of the fuel injection system openings are given in Table 1. It is the responsibility of the servicing center to obtain these protective covers.