WÄRTSILÄ PAAE051728, Instruction Manual

Page: 268 / 394

Maximum lift of nozzle, removing of nozzle from holder
6 Clean the components.
If possible, use a chemical carb-
on dissolving solution. If there is no such available, immerse
the details in clean fuel oil, white spirit or similar to soak
carbon. Then clean the components carefully by tools included
in the tool set. Do not use steel wire brushes or hard tools .
Clean the nozzle orifices with needles provided for this pur-
pose. After cleaning, rinse the details to remove carbon resi-
dues and dirt particles.
Before inserting the needle in the nozzle body, immerse the
components in clean fuel oil or special oil for injection systems.
Seat surfaces, sliding surfaces (needle shaft) and sealing
faces against the nozzle holder should be carefully checked.
7 Clean the nozzle holder
and the cap nut carefully; if ne-
cessary, dismantle the nozzle holder to clean all details.
Check the nozzle spring.
8 Check the high pressure sealing faces
of the nozzle
holder, i.e. the contact face to nozzle and the bottom of the fuel
inlet hole.
9 Check maximum lift of nozzle,
i.e. sum of measures A
and B in Fig 16-5. If the wear B exceeds 0.10 mm, the nozzle
holder can be sent to the engine manufacturer for recondition-
ing. If the total lift is out of the value stated in chapter 06,
section 06.2, the nozzle should be replaced by a new one.
B
A
B
A
B
A
Alternative 3
Alternative 1
Alternative 2
Fig 16-5
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16 Injection System 32-200627-01
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