Wartsila RT-flex50-D - Machining of Sealing Face for Injection Valve

Maintenance
2708−3/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 1
Tools: Key to Illustrations:
1 Overhauling device 94270 1 Cylinder cover 5 Profiling cutter
2 Milling cutter holder 6 Centring mandril
3 Guide flange 7 Screw
4 Setscrews
1. General
The seat sealing face in the cylinder cover must be clean and undamaged as the
sealing is metallic.
Should any blow-by of combustion gases have been noticed during engine opera-
tion, the spring packets with their screws of the injection valve are not, under any
circumstances, to be tightened further as a counter measure.
2. Machining of sealing face
Dirty or slightly damaged sealing faces can be r
e-
conditioned on the spot by using overhauling d
e-
vice 94270.
⇒ Carefully insert the profiling cutter, bolted
to
the milling cutter holder, into the hole in th
e
cylinder cover.
⇒ Fasten guide flange 3 with screws 7.
When the tool is being used, the centrin
g
mandril on the profiling cutter on the on
e
hand and the guide flange on the other, giv
e
the tool the necessary stability and directio
n.
⇒ Cutting is done by pressing down lightly wi
th
the hand on the milling cutter holder at th
e
same time as turning the hexagon even
ly
with the other hand using the ring spanner
.
Try to remove as little material as possible b
ut
sufficient, however, to obtain the desire
d
standard for the seating area.
D Putting some sticky grease on the profilin
g
cutter will prevent any foreign matter from e
n-
tering the combustion chamber during ove
r-
haul.
012.903/05
1
4
5
6
2
3 7
C
ylinder Cover
M
achining of Sealing Face for Injection Valve
2010