190D 2.5 (201.126) L5-2.5L DSL (602.911) (1987)
Fig. 8 Sectional view of cylinder crankcase, pre-combustion chamber & nozzle holder.
On these engines, the thread for attaching the nozzle holder is part of the pre-combustion chamber, Fig. 7. The threaded ring for mounting the
pre-combustion chamber incorporates internal teeth, Fig. 8. Socket tool No. 603589000900 must be used to remove this threaded ring. A sleeve is
installed in the gap between the threaded ring and nozzle holder to prevent the entry of dirt of other debris. When installing, then sleeve must be installed
prior to installation of the nozzle holder.