WÄRTSILÄ RT-flex50-D, Maintenance Manual

Page: 143 / 522

Maintenance
2124−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 1
Tools: Key to Illustrations:
1 Inside micrometer 94101 1 Cylinder liner
1 Tool cylinder liner measuring 94102 2 Antipolishing ring
1 Measuring gauge 94225 ST Setting screw
⇒
The cylinder liner wear is to be determined af-
ter every piston removal with the cylinder liner
in situ.
⇒
To permit comparisons with previous mea-
sures always carry out measuring in the same
place and note down the values in a log.
⇒
Always use the properly adjusted measuring
gauge 94225.
Check setting screw ’ST’. Its lower pro-
truding length must correspond to the
mean thickness of the built-in compres-
sion shims. This ensures that the topmost
measuring point is located between the top
ring wear ridge and the antipolishing ring.
The unrun position must be thoroughly
cleaned from any deposits or lacquer before
measurement.
⇒
Hook the measuring gauge over the top face
of the cylinder liner.
⇒
The measurements have to be taken in longi-
tudinal and transversal directions to the en-
gine axis by putting the inside micrometer
94101 into the holes provided in the measur-
ing gauge.
For maximum permissible inside diameter re-
fer to Clearance Table
0330−1 ’Cylinder liner’.
⇒
The ridge at the top of the cylinder bore has to
be removed carefully without damaging the
running surface for the piston rings (see
2124−3 ).
⇒
Remove the lower part of the measuring
gauge 94225 for measuring the cylinder liner
with piston in situ. Turn piston to B.D.C.
Cylinder Liner
Measuring Bore Wear
2011-12
1
016.556/08
94101
2
SETTING SCREW ’ST’ DRAWN FOR COM-
PRESSION SHIM THICKNESS = 0 mm.
ST
94225
CHECK
CHECK