WÄRTSILÄ Vasa R22, Instruction Manual

Page: 199 / 297

Maximum lift of nozzle, removing of nozzle from holder
5 Clean the details. If possible, use a chemical carbon dis-
solving solution. If there is none available, immerse the details
in clean fuel oil, white spirit or similar to soak carbon. Then
clean the details carefully by the tools 845006. Do not use steel
wire brushes or hard tools! Clean the orifices of the nozzle with
needles provided for this purpose. After cleaning, rinse the
details to remove carbon residues and dirt particles.
Before inserting the needle in the nozzle body, immerse the
details 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.
6 Clean the nozzle holder and cap nut carefully; if neces-
sary, dismantle the nozzle holder to clean all details. Check the
nozzle spring (8).
7 Check the high pressure sealing faces of the nozzle
holder, i.e. the contact face to the nozzle and the bottom of the fuel
inlet hole.
8 Check maximum lift of the nozzle, i.e. the sum of meas-
ures A and B in Fig 16-3. If wear B exceeds 0.05 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 pos. 16, the nozzle should be replaced by a new
one.
9 Reassemble the injection valve.
A
B
Fig 16-3
2216529213
16 Injection System 22-9601
16-10 L’Orange