MTU 12V4000M73 series Operating Instructions Manual page 190

Note: Observe system pressure.
4. Slowly loosen union on HP line (4).
5. Remove HP line (4).
Note: The fuel stored in the injector drains out
when the adapter (3) is unscrewed.
6. Unscrew adapter (3).
Note: Components are sensitive.
7. Protect contact surfaces of HP line (4) and
adapter (3) on cylinder head and the HP line
(4) itself against damage.
8. Unscrew screw (2).
9. Install installation/removal jig on cylinder
head.
10. Remove injector with installation/removal jig
and take off hold-down clamp.
11. Remove installation/removal jig.
Note: The sealing ring (4) for sealing the combus-
tion chamber must only be used once.
12. Remove sealing ring (4) from injector or use a
self-made wire hook or magnet to take it out
of the cylinder head and dispose properly.
Note: For new assembly:
13. Dispose of injector with O-rings in place.
Note: For repeated assembly:
14. Remove O-rings (3), O-ring (2) and damper
ring (1) from injector.
15. Clean all mating and sealing surfaces.
16. Cover all connections and bores, or seal with
suitable plugs.
188 | Injection Valve / Injector | MS150045/03E 2018-08