Maintenance
9403−3/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 9
1. General
The hydraulic pre-tensioning jacks forming part of the engine tool kit are to be
stored in their tool boxes when not in use, in a clean place, where they are pro-
tected from damage (after greasing them and closing the connections with dust
plugs). We recommend to always keep in stock a sufficient number of new O-rings,
back-up rings, piston seal rings and rod seal rings of the specified quality and di-
mensions.
When fitting new back-up rings, piston and rod seal rings proceed with care, to
avoid their damage; do not use any sharp edged utensils for assistance.
Heat unslit back-up and sealing rings which are used as piston seal rings in boiling
water before fitting them.
Tool 94114b Double pre-tensioning jack
for waisted studs to main bearing
1 Piston 6 Back-up ring
O-ring
Sealing ring
2 Double cylinder 7
3 Round nut 8 Back-up ring
O-ring
Sealing ring
4 Holder 9
5 Vent screw 10 Adapter
11 Closing valve
3
1
2
018.674/09
6
7
9
8
4
5
5
4
1110
ydraulic Pre-tensioning Jacks
toring, Servicing and Maintenance
50−D / 2011-12
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